| Go back to previous topic | | Forum name | Performance/Engine | | Topic subject | NoObs - your lesson for the day: CAN U ANSWER THIS...? | | Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=65834 |
65834, NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Skrilla, Jan-05-04 09:54 AM
What causes air to enter the cylinders and WHY. The atmosphere pushing in air as the pistons move up and down or the pistons sucking in air....
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65835, RE: CAN U ANSWER THIS...? Posted by extreme97nt, Jan-05-04 10:02 AM
The pistons suck the air in on the down stroke and then compress it on the way up once the intake valves close.
 best time so far 14.3 @ 101.1mph
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65836, RE: CAN U ANSWER THIS...? Posted by oRACLe063, Jan-05-04 10:02 AM
survey says vaccuum ... fire consumes air ....the absence of air creates a vacuum ... a vaccuum likes sucking things ... :wary
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65840, RE: CAN U ANSWER THIS...? Posted by DarkOne, Jan-05-04 10:11 AM
I can't beleive i just read this question from you of all people. What is this world coming to? My faith in Old Schoolers has been shaken to its foundations.
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65841, RE: CAN U ANSWER THIS...? Posted by Michael_97RS, Jan-05-04 10:12 AM
Originally posted by DarkOne I can't beleive i just read this question from you of all people. What is this world coming to? My faith in Old Schoolers has been shaken to its foundations.
I hope it was a question to teach a lesson. Josiah should know better.

http://www.exileracing.com una salus victus Mods List: http://highlander.dsmpower.com/sig.htm
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65843, RE: CAN U ANSWER THIS...? Posted by Skrilla, Jan-05-04 10:33 AM
Originally posted by Michael_97RSOriginally posted by DarkOne I can't beleive i just read this question from you of all people. What is this world coming to? My faith in Old Schoolers has been shaken to its foundations. I hope it was a question to teach a lesson. Josiah should know better. http://www.exileracing.com una salus victus Mods List: http://highlander.dsmpower.com/sig.htm
NAIL ON HEAD SIR, NAIL ON HEAD
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65844, RE: CAN U ANSWER THIS...? Posted by Skrilla, Jan-05-04 10:35 AM
Originally posted by DarkOne I can't beleive i just read this question from you of all people. What is this world coming to? My faith in Old Schoolers has been shaken to its foundations.
LMAO! Dino you fucktard, my car accident didn't warp my brain It is EXACTLY what Mike said,
ROFLMAO!!
EDIT: I'm still waiting to hear the CORRECT answer which means NO ONE answered yet
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65845, RE: CAN U ANSWER THIS...? Posted by DarkOne, Jan-05-04 10:36 AM
Well, having every bone in your face broken can do strange things to a person. :shrug At least dumb isn't contagious.. i'd be severely infected at this point.. ;-)
Anyway, all jokes aside, i'll let the KNOOBS answer this one.
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65847, RE: CAN U ANSWER THIS...? Posted by Skrilla, Jan-05-04 10:48 AM
Originally posted by DarkOne ...At least dumb isn't contagious.. . i'd be severely infected at this point.. ;-)...
LOL...This is going into my signature
My question still hasn't been answered by anybody...at least try people
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65848, RE: CAN U ANSWER THIS...? Posted by Michael_97RS, Jan-05-04 11:00 AM
Give em some time Josiah, don't spoil the lesson yet.

http://www.exileracing.com una salus victus Mods List: http://highlander.dsmpower.com/sig.htm
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65850, RE: CAN U ANSWER THIS...? Posted by Eagle 5, Jan-05-04 11:33 AM
there are little hamsters running on spinning wheels, the wheels suck air in from the outside into the cylinders. kind of like little fans, they make a nice buzzing noise..... oh wait, thats how a honda works...
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65851, RE: CAN U ANSWER THIS...? Posted by run4cvr, Jan-05-04 11:47 AM
Air is sucked into the cylinder as the piston travels from TDC to BDC. This holds true until you add forced induction.
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65854, RE: CAN U ANSWER THIS...? Posted by bullox, Jan-05-04 12:07 PM
there are little crackheads down there sucking their brains out for just one more hit ______________ Chris 96 ESI 5 spd Milwaukee, WI
Originally posted by Z87RSMan the Mustang is an American icon...I have one because it sounds great
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65858, RE: CAN U ANSWER THIS...? Posted by Avenger, Jan-05-04 12:57 PM
:wary
This is pretty funny actually.
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65865, RE: CAN U ANSWER THIS...? Posted by bullox, Jan-05-04 01:48 PM
Next on 2GNT.com - elitism running rampant - what can YOU do about it? Details at ten. ______________ Chris 96 ESI 5 spd Milwaukee, WI
Originally posted by Z87RSMan the Mustang is an American icon...I have one because it sounds great
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65866, RE: CAN U ANSWER THIS...? Posted by onetrav, Jan-05-04 01:55 PM
About the hamster coment, you were close but not quite right. The hamsters on the wheels run, the running is maintained as mechanical energy. The engine itself would not need air at all if the hamster didnt have to breath. The better the intake flow, the better your hamsters breathe, therefore, the better the car runs!:D
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65884, RE: CAN U ANSWER THIS...? Posted by DarkOne, Jan-05-04 06:06 PM
Originally posted by bullox Next on 2GNT.com - elitism running rampant - what can YOU do about it? Details at ten.
LOL. We're old friends, let us play.
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65869, RE: CAN U ANSWER THIS...? Posted by foggy45, Jan-05-04 02:50 PM
On the intake stroke, the intake valve has opened. The piston is moving down, and a mixture of air and vaporized fuel is being pushed by atmospheric pressure into the cylinder through the intake valve port.
good enough?:shrug
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66251, RE: CAN U ANSWER THIS...? Posted by CrazyEclipse, Jan-10-04 07:47 AM
Originally posted by Eagle 5 there are little hamsters running on spinning wheels, the wheels suck air in from the outside into the cylinders. kind of like little fans, they make a nice buzzing noise..... oh wait, thats how a honda works...
NICE!
 Undergoing MAJOR modifications, inside and out member# 2498 / girl member# unknown
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65868, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by mrj82, Jan-05-04 02:04 PM
Originally posted by Skrilla What causes air to enter the cylinders and WHY. The atmosphere pushing in air as the pistons move up and down or the pistons sucking in air....
Ok I bet I got your answer for you. As soon as the intake valve/valves open atmosphereic pressure is higher then cylinder pressure therefor high pressure follows low pressure filling the cylinder. Of course depending on overlap of your camshaft, the exhaust valve may still be opening and the exhaust pulse leaving the cylinder will draw in fresh air too. I know why and how it works, I'm just not good at explaining it. After all I went to school to learn this shit.
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65871, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by mrj82, Jan-05-04 03:20 PM
What the hell foggy you trying to rip off my answer? I clearly posted my answer first(look at the time) and now your sounding pretty much like you got that idea from me...........
I got the sonic if you got the boom.
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65926, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 05:44 AM
Originally posted by mrj82 What the hell foggy you trying to rip off my answer? I clearly posted my answer first(look at the time) and now your sounding pretty much like you got that idea from me........... I got the sonic if you got the boom.
lmao, thought this was damn funny
MOMMMMMMA HE TOOOK MY ANSWERRRR
_________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65961, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by VX100, Jan-06-04 09:14 AM
Basic fundemental question, the answer to which is essential to understanding how an internal combustion engine works.
We could have an on-line class about the workings of the internal combustion engine, taught be Skrilla, Mike, Thura, and Dino.. err, maybe not Dino, as he'd fail people randomly for the hell of it or for stupid questions.. }(
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65962, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by DarkOne, Jan-06-04 09:19 AM
Originally posted by VX100 maybe not Dino, as he'd fail people randomly for the hell of it or for stupid questions.. }(
I'm such a mean, mean man.
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65963, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 09:21 AM
the piston starts at the top, the intake valve opens, and the piston moves down to let the engine take in a cylinder-full of air and gasoline. (aka it uses vaccum to suck in air on the intake stroke) _________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65967, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by mototool, Jan-06-04 10:47 AM
I laugh at all of you.
Everyone knows that a TURBO forces the air into the cylinder :wary
Wait, maybe I'm just making shit up. Yep. That's it. Sorry, I was pretending that I was someone else for a second.
Everyone knows that a long rod engine has a larger rod angle because the rod is longer. Oh, wait, I'm full of shit and totally wrong on that one, too.
;( <- that was me in the bathroom today.
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65968, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 10:52 AM
mototool = dino's alter ego _________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65970, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by mototool, Jan-06-04 10:58 AM
Originally posted by turbo8u mototool = dino's alter ego
*sigh*
I wish. I want Dino to fill my loins with all of the creamy goodness that he has to offer. My loins ache for his man juices.
If you were half the man that Dino is, I'd ache for yours, too.
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65971, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 11:04 AM
Originally posted by mototoolOriginally posted by turbo8u mototool = dino's alter ego *sigh* I wish. I want Dino to fill my loins with all of the creamy goodness that he has to offer. My loins ache for his man juices. If you were half the man that Dino is, I'd ache for yours, too.
wtf? ghey bastard.
_________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65973, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by finxster, Jan-06-04 11:07 AM
Originally posted by mototoolOriginally posted by turbo8u mototool = dino's alter ego *sigh* I wish. I want Dino to fill my loins with all of the creamy goodness that he has to offer. My loins ache for his man juices. If you were half the man that Dino is, I'd ache for yours, too.
wtf?
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65975, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 11:10 AM
i seriously think its just dino fucking around _________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65981, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Skrilla, Jan-06-04 11:23 AM
Originally posted by turbo8ui seriously think its just dino fucking around _________ 96 talon esi-t san clemente, ca DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
Wow. I was thinking the same thing, but then he'd be having arguments with himself :shrug :+
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65982, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 11:26 AM
Originally posted by Skrilla Wow. I was thinking the same thing, but then he'd be having arguments with himself :shrug :+
if any of us said this to dino, we'd be banned. but not mototool, thats why i figured it was dino just fucking around on a name he knows he can say anything he wants on
Originally posted by mototoolOriginally posted by DarkOneLet's keep the name calling and yo mama jokes to a bare minimum, k? Your mom.
mototool just needs to shut the fuck up
_________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65991, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by bullox, Jan-06-04 12:05 PM
i put de gas in de car and it go. :shrug
:+ ______________ Chris 96 ESI 5 spd Milwaukee, WI
Originally posted by Z87RSMan the Mustang is an American icon...I have one because it sounds great
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65977, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Skrilla, Jan-06-04 11:12 AM
Originally posted by VX100 ...We could have an on-line class about the workings of the internal combustion engine, taught be Skrilla, Mike, Thura, and Dino.. err, maybe not Dino, as he'd fail people randomly for the hell of it or for stupid questions.. }(
And yourself if I remember correctly, Dino would definitely be a teacher, he'd be the principal, the guy you saw once you fucked up, lol.
I must say, I see one very good answer regarding pressure fronts. Vacuum is cause by nature and pressure (atmospheric) whereas suction could almost be considered artificial (I don't feel like checking it out now anyway). Why else would space be called a Vacuum. This is the basis on which non pressurized motors are refered to as being Naturally Aspirated. Becuase it is the pressure (14.7lbs to be exact) of Nature that fills the chambers. Intake restriction is what limits how well the chambers are filled (called Volumentric Efficiency-VE) for you No0bs). The artificial suction produced by turbos to draw in air to bring into the cylinders is what makes engines operate over VE. This is the reason a 2L@15lbs can make the power of a 4Liter+ NA, or why at twice the atmospheric pressure our motors make almost twice the power, of course there are other variables but this is consistant with it's understanding. A variable I've become infatuated with (Yes parts of my motor I'd have wet dreams over) as of late is the Camshaft which can use dramatic overlap and duration to create blow threw to slam air into the combustion chamber when the valves close, packing in that extra bit of O2.
Other things which aren't mainstream yet are sound waves used on tuned intake manifolds which can produce more power with the proper length or tuned headers helps exhaust pulses from running into eachother and exiting the engine quickly and *efficiently* (quicker velocity leads to better chamber filling hence VE)
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65979, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Uberingram, Jan-06-04 11:21 AM
Too many big words...head hurts.../me dies
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65980, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 11:22 AM
Originally posted by Uberingram Too many big words...head hurts.../me dies
lol thats what im screamin up in hurrr
_________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65993, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by jamesman, Jan-06-04 12:07 PM
The reality is that space is a lack of air, hence total vacuum. pressure on earth is caused by the atmosphere acting like a balloon around the earth. Vacuum is truly the lack of Air. 100 % vacuum will be a condition where a chamber or vessel has a complete lack of all air within. Different planets with different masses and atmospheric densities will have a different atmospheric pressure than the earth's 14.5 psi or so. So, with regards to an engine, if the piston is at TDC then only the availiable volume will be filled with the 14.5 atmospheric PSI. As the piston moves down towards BDC, the 14.5 atmospheric PSI will rush into the cylinder to fill the increasing volume of the cylinder where the intake valves will eventually close. "suction" by standard terms is what you would feel if you were to place your hand over the intake ports while the piston is moving from TDC to BDC. Also, since the piston to cylinder wall contact is basically a seal, this actually helps draw in air more effectively than if it were to passively fill the chamber by just atmospheric pressure. There is a point where you can actually get more air in the cylinder than it can hold statically. This is due to the fact that the air going into the cylinder has a velocity and when the piston reaches BDC although the cylinder volume at this point does not increase, the momentum of the moving air will actually force a little more air into the cylinder. this would be the ideal time for the intake valves to close, and from my research, this is what high performance NA cars are after. this is also one reason why adjustable cam gears help to extract more power.
okay, i'm done
late james
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66003, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Skrilla, Jan-06-04 12:50 PM
Originally posted by jamesman The reality is that space is a lack of air, hence total vacuum. pressure on earth is caused by the atmosphere acting like a balloon around the earth. Vacuum is truly the lack of Air. 100 % vacuum will be a condition where a chamber or vessel has a complete lack of all air within. Different planets with different masses and atmospheric densities will have a different atmospheric pressure than the earth's 14.5 psi or so. So, with regards to an engine, if the piston is at TDC then only the availiable volume will be filled with the 14.5 atmospheric PSI. As the piston moves down towards BDC, the 14.5 atmospheric PSI will rush into the cylinder to fill the increasing volume of the cylinder where the intake valves will eventually close. "suction" by standard terms is what you would feel if you were to place your hand over the intake ports while the piston is moving from TDC to BDC. Also, since the piston to cylinder wall contact is basically a seal, this actually helps draw in air more effectively than if it were to passively fill the chamber by just atmospheric pressure. There is a point where you can actually get more air in the cylinder than it can hold statically. This is due to the fact that the air going into the cylinder has a velocity and when the piston reaches BDC although the cylinder volume at this point does not increase, the momentum of the moving air will actually force a little more air into the cylinder. this would be the ideal time for the intake valves to close, and from my research, this is what high performance NA cars are after. this is also one reason why adjustable cam gears help to extract more power. okay, i'm done late james
Yup something else I don't want to get into. I like that explanation but
Originally posted by jamesman Also, since the piston to cylinder wall contact is basically a seal, this actually helps draw in air more effectively than if it were to passively fill the chamber by just atmospheric pressure.
I totally dissagree with, as a matter of fact it impossible for cylinder to draw in air, it is totally up to the atmosphere to allow it to enter, or better yet to push it in, as must a turbo do. If there were no presure and the cylinder were totally sealed the block would sieze. The best analogy I can come up with is when you have a gas container and there is a little hole needed to allow air to displace the gas as it is poured into your take, without the *displacing hole* (haha made that word up). The container would buckle back and forth while the air was displaced upon entering where the gas poured out of; even similar to completely turning over a 2L of soda so that the top is facing down. The container damn near goes into convultions until the liquid is gone (try this you will know what I mean). Now the Motor can't buckle in such a manner, but without pressure and the motor fighting the atmosphere the engine, again, would sieze. *Some* pressure will be trapped in the block, of course (because metal is tougher than plastic), in the process, but that's why we have a PCV.
So the moral of the story is that the atmosphere pushes in air the motor does not suck it in. Have you ever put your hand on the drain of a full bath tub, it feels like the drain is "sucking" your hand but really it's the water pushing to escape and drain, that is the same thing here folks. The outside pressure creates the Vacuum as stated quite excellently here
Originally posted by jamesman The reality is that space is a lack of air, hence total vacuum. pressure on earth is caused by the atmosphere acting like a balloon around the earth. Vacuum is truly the lack of Air
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66004, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 12:56 PM
^^^ exactly skrilla
why do you think your car runs like ass in the mountains? lower psi in the air (not sea level) _________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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66005, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Skrilla, Jan-06-04 01:00 PM
Originally posted by turbo8u^^^ exactly skrilla why do you think your car runs like ass in the mountains? lower psi in the air (not sea level) _________ 96 talon esi-t san clemente, ca DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
nail on head,
because there isn't enough pressure to push in enough air
More air will yeild higher A/F ratio with enough fuel, we all know that burning more fuel will gain more power
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66006, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-06-04 01:04 PM
i guess you learn somethin new everyday, eh? _________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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66058, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by jamesman, Jan-07-04 08:20 AM
if the cylinder volume is increasing faster than the flow rate that the ports can handle then the seal between the piston and cylinder will cause air to be drawn in faster than atmospheric pressure can push it in. Yes, if we were not talking about a dynamic system then you would be correct, but we have a changing volume here. The 2 liter soda you are talking about is a fixed volume system. Since the volume of the bottle remains constant and you are removing the liquid from the inside, you are decreasing the amount of material but not decreasing the volume. then you get the convulsions where the fixed volume is trying to maintain its size by displacing soda with air. We are not talking about the same thing here. There are many variables that are not being addressed and yes the basic premise is that atmospheric pressure fills our cylinders, but it ain't as simple as that.
late james
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66115, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by micyek, Jan-08-04 08:09 AM
Originally posted by jamesman if the cylinder volume is increasing faster than the flow rate that the ports can handle then the seal between the piston and cylinder will cause air to be drawn in faster than atmospheric pressure can push it in. Yes, if we were not talking about a dynamic system then you would be correct, but we have a changing volume here. The 2 liter soda you are talking about is a fixed volume system. Since the volume of the bottle remains constant and you are removing the liquid from the inside, you are decreasing the amount of material but not decreasing the volume. then you get the convulsions where the fixed volume is trying to maintain its size by displacing soda with air. We are not talking about the same thing here. There are many variables that are not being addressed and yes the basic premise is that atmospheric pressure fills our cylinders, but it ain't as simple as that. late james
probably no one will see this but oh well...your right....if you squeeze that bottle of soda the fulid comes out much more efficently because your decreasing the volume of the container.
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66043, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Michael_97RS, Jan-07-04 03:56 AM
Originally posted by SkrillaOriginally posted by VX100 ...We could have an on-line class about the workings of the internal combustion engine, taught be Skrilla, Mike, Thura, and Dino.. err, maybe not Dino, as he'd fail people randomly for the hell of it or for stupid questions.. }( And yourself if I remember correctly, Dino would definitely be a teacher, he'd be the principal, the guy you saw once you fucked up, lol. I must say, I see one very good answer regarding pressure fronts. Vacuum is cause by nature and pressure (atmospheric) whereas suction could almost be considered artificial (I don't feel like checking it out now anyway). Why else would space be called a Vacuum. This is the basis on which non pressurized motors are refered to as being Naturally Aspirated. Becuase it is the pressure (14.7lbs to be exact) of Nature that fills the chambers. Intake restriction is what limits how well the chambers are filled (called Volumentric Efficiency-VE) for you No0bs). The artificial suction produced by turbos to draw in air to bring into the cylinders is what makes engines operate over VE. This is the reason a 2L@15lbs can make the power of a 4Liter+ NA, or why at twice the atmospheric pressure our motors make almost twice the power, of course there are other variables but this is consistant with it's understanding. A variable I've become infatuated with (Yes parts of my motor I'd have wet dreams over) as of late is the Camshaft which can use dramatic overlap and duration to create blow threw to slam air into the combustion chamber when the valves close, packing in that extra bit of O2. Other things which aren't mainstream yet are sound waves used on tuned intake manifolds which can produce more power with the proper length or tuned headers helps exhaust pulses from running into eachother and exiting the engine quickly and *efficiently* (quicker velocity leads to better chamber filling hence VE)
Yeah, Todd neglected his school race team experience when he was volunteering teachers.
On the matter is intake design and restriction. There's a sacrafice for driveability. A larger runner is obviously going to flow well on the high end. But go to big and the velocity of the air coming in will slow down and not be able to fill the chamber effectively. due to valve timing, duration, speed of the piston, and scavanging effact of the exhaust(more below).
I'll expand on your last part: Tuned headers and proper exhaust set up wil lead to better chamber filling. A cam with overlap will have more time for the xhaust gas to leave and pull in fresh air behind it. As the exhaust gas pulses exit they move with such velocity as they hit the collector the speed of the exhaust pulse will continue to move in the direction it is forced, in the exhaust runners that do not have exhaust pulses yet the pressure in them is lower, the exhaust gas pulse that is moving pulls the next along with it to fill this lower pressure area. This is called the scavenging effect. (historical note: this used to be called supercharging, before blowers were created). This scavenging effact as it speeds along the next exhaust gas pulse, can pull is along faster. Which in turn will speed the fresh air that follows the spend exhaust gases helping fill the chamber better and faster.

Exile Racing Technologies: http://www.exileracing.com una salus victus Mods List: http://highlander.dsmpower.com/sig.htm
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66050, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by turbo8u, Jan-07-04 05:17 AM
two words:
over-lap _________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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65994, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by foggy45, Jan-06-04 12:08 PM
sorry MRJ82 didnt mean to peak at your answer.
i hit reply on the first page cuz i was tired of the jokers. not that they werent funny!
i just wanted to win! after it posted i noticed i was sitting after you.
for the record i didnt rip your answer.
we can race for it, then ill buy ya a beer. fair?:cheers
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66000, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by babybeclipse, Jan-06-04 12:44 PM
ok, time for noob language.
Piston thingy goes down
Air from intake go into motor to chase piston like a dumb dog after a car.
valves closes (air goes "oh shit") and the piston aka car runs over the dog (air/fuel charge) to the top of the cylinder.
stuff goes boom and then the piston flyes to the bottom of the bore then tells the exhaust to GTFO when the exhaust valves open!
Hope that clears things up for all you noobies:thumbsup
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66008, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by hydrata, Jan-06-04 01:24 PM
you know what, i'm both glad for this thread and pissed off. yes, i know i'm a noob and i gladly admit it, for we all start somewhere. even you old schoolers were noob's once, believe it or not. so i do appreciate the online lesson and information, but i do not appreciate the pompous attitude you guys do it in. one reason i enjoy this board is for the feeling of willingness to help. please do not turn into a board that turns away noobs by acting like arrogant dicks. everyone starts somewhere, just bear with them. i understand the original intent of the thread was to teach, but ummm, there's better ways to go about it, and it could really come about without all the sarcastic and arrogant attitudes. please, stick to being helpful, don't expect us to know everything, and realize, we're trying to learn, and there's a certain sense of respect for the "teacher" don't ruin that.
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66024, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by Mystic511, Jan-06-04 04:48 PM
hydrata, most 'noobs' sit quietly until they can gather enough info to be accepted as a non noob, at which point they earn the right to bash noobs. What we're talkin about is the maturation of any individual as he learns more. This sociological aspect of noobs can be reflected in everything. Frats, upperclassmen-lowerclassmen relationships, veteran soldiers-new recruits, etc etc. You're fighting against human characterisitc, what you're saying isn't going to change anything, it'll most likely just draw attention to yourself as a whiner. Not tryin to bash you, just showin you truth of the matter. :)
Back on post subject: So skrilla, you're trying to tell me this whole post was just physics debate? I thought it was just easier to use the word "suck" and imply that the elements in question are being pushed to equalize pressure between two environments.. because, well, it's easier to say suck.
But, my answer was going to be that when the intake valve(s) open, air is being drawn in. Can I use the word "drawn" or is that just as bad as "suck"? }(
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66031, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by hydrata, Jan-06-04 06:34 PM
mystic, you're going overboard...it's an internet forum, not some established form of hierarchy, sheesh.
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66034, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by bullox, Jan-06-04 07:55 PM
Originally posted by hydrata mystic, you're going overboard...it's an internet forum, not some established form of hierarchy, sheesh.
now now, lets not make a scene :+
______________ Chris 96 ESI 5 spd Milwaukee, WI
Quote by Travis Bickle Some day a real rain will come and wash all the scum off the streets.
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66026, RE: NoObs - your lesson for the day: CAN U ANSWER THIS...? Posted by mrj82, Jan-06-04 05:04 PM
Originally posted by foggy45 sorry MRJ82 didnt mean to peak at your answer. i hit reply on the first page cuz i was tired of the jokers. not that they werent funny! i just wanted to win! after it posted i noticed i was sitting after you. for the record i didnt rip your answer. we can race for it, then ill buy ya a beer. fair?:cheers
I'm sorry bro I was just joking there. I didn't think anyone would take me serious lol. Anyway at least noone had to tell us that the atmosphere is what fills the cylinders. Lucky me, I have to change my intake gasket asap, then I'll buy me a pulley puller and put on my udp. I just made my own ground wire kit, works pretty good, the car pulls a little harder around 3.5k-6k rpm. Pretty impressive for some wires that didn't cost me a thing. I work at a car audio shop btw.
I got the sonic if you got the boom.
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66060, Noob Honors program... Posted by ez, Jan-07-04 08:42 AM
Okay, extra credit for figuring out what would be the ideal length and diameter of intake runners (having a REALISTIC length), as well as the ideal plenum volume for a hypothetical intake manifold (single plenum design) for a 2 L engine, for the purpose of having a helmholtz resonating effect somewhere between 5000 and 7000 rpm }(
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66061, RE: Noob Honors program... Posted by babybeclipse, Jan-07-04 09:00 AM
Originally posted by ez Okay, extra credit for figuring out what would be the ideal length and diameter of intake runners (having a REALISTIC length), as well as the ideal plenum volume for a hypothetical intake manifold (single plenum design) for a 2 L engine, for the purpose of having a helmholtz resonating effect somewhere between 5000 and 7000 rpm }(
I'll have to get back to you on that one. Having problems carrying the one:P
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66067, RE: Noob Honors program... Posted by turbo8u, Jan-07-04 09:41 AM
Originally posted by ez Okay, extra credit for figuring out what would be the ideal length and diameter of intake runners (having a REALISTIC length), as well as the ideal plenum volume for a hypothetical intake manifold (single plenum design) for a 2 L engine, for the purpose of having a helmholtz resonating effect somewhere between 5000 and 7000 rpm }(
pez, you're to smart for your own good. one day your brain is going to blow up, and who knows....it might smell like blueberries, lol
_________ 96 talon esi-t san clemente, ca
DarkOne> Screw you guys, i'm going home. chrysler kid> and fyi i have never HAD to shave. DR1665> I'm sure your Talon and my Talon are all there needs to be, since we're the only two Talons that really matter around here
Originally posted by sarahdr1665 ...some girls like the "nerdy" guys
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66073, RE: Noob Honors program... Posted by foggy45, Jan-07-04 12:28 PM
can i get the question in english please? my head hurts, im gonna go fix my car or somthing and then find the library and a physics book!:9
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66075, RE: Noob Honors program... Posted by etx, Jan-07-04 01:01 PM
hah! Skrilla want't to play with the knoobs! :D
Your right, but throughout the course of life we regard such a phenomena as sucking, not lack of volume. Trick question. :P
It's the same reason your ears pop at the bottom of a swimming pool. The force of alllll the watter above you is tring to displace the air in your head because the air is lighter. Well... It's close to the same idea. Water is heavier than air, just like air is heavier than a lack of air.
You guys don't like lessons in physics? Stop playing with your car, physics is the basis of eveything we are doing. :7 Etx, like physics.
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66106, RE: Noob Honors program... Posted by Skrilla, Jan-08-04 04:56 AM
Originally posted by etx hah! Skrilla want't to play with the knoobs! :D Your right, but throughout the course of life we regard such a phenomena as sucking, not lack of volume. Trick question. :P It's the same reason your ears pop at the bottom of a swimming pool. The force of alllll the watter above you is tring to displace the air in your head because the air is lighter. Well... It's close to the same idea. Water is heavier than air, just like air is heavier than a lack of air. You guys don't like lessons in physics? Stop playing with your car, physics is the basis of eveything we are doing. :7 Etx, like physics.
LOL yup physics is fun :thumbsup
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66109, RE: Noob Honors program... Posted by etx, Jan-08-04 07:24 AM
Fun until you get water traped in your head from swimming at the bottom of the pool!
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66188, RE: Noob Honors program... Posted by Eagle 5, Jan-09-04 05:20 AM
Also instead of saying lack of air, you can say air fills the cylidners because of a pressure drop. yeah its the same thing as lack of air so air goes in but a lack of air generally means lower pressure. Works the same way as the air in a gas turbine (or jet engine) air moves to where there is lower pressure, right after its been compressed there is a diffuser before the combustor, air moves toward the lower pressure. same in a car engine, air goes where there is lower pressure.
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66224, RE: Noob Honors program... Posted by Pyscodragon, Jan-09-04 03:22 PM
Dont we have better things to be discussin like why in the hell we dont have a better flowing head on our block? And not ask ?'s that if you dont know you shouldnt be moddin your car....... Ahhh screw it lets screw with the noobs minds :cheers
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66226, RE: Noob Honors program... Posted by etx, Jan-09-04 03:55 PM
Our head flows fine. It could use some work, but it's on par if you ask me.
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66255, RE: Noob Honors program... Posted by Skrilla, Jan-10-04 09:52 AM
Originally posted by Pyscodragon Dont we have better things to be discussin like why in the hell we dont have a better flowing head on our block? And not ask ?'s that if you dont know you shouldnt be moddin your car....... Ahhh screw it lets screw with the noobs minds :cheers
Um are heads are the shit
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