I am debating boosting my 97 rs with 90,000 miles. I know theres no way to tell how long stock internals will last but how long have some of you boosted on a stock motor. If I did turbo it would be something on the smaller side of the spectrum with capabilities to make 300 horsepower or more, should i be considering a 16g? Oh and a buddy of mine has "forged" pistons for his 4g63 and is convinced they'll fit a 420a, any truth in that?

stock internals have been proven to be good to 10psi even ryan9514 has boosted to 12psi on them, how long they last is a different story

as far as the 4g63 pistons no the will NOT fit, tell your friend he is a jackass

I boosted 7 psi for 12k and then 10 psi for 42 seconds.

Take that how you want to.

I eat emo kids for breakfast

1995 Eagle Talon (SOLD)
72' SuperBeetle
72' Standard Beetle
56' Deluxe Beetle

Here is the deal...even though a lot of people will tell you to search because this has been posted more times then I can even remeber, I will fill you in, but you have to promise to search from now on!

OK...when you boost on a N/A platform you are playin a little game called weakest link. Our ringlands are known to go out first...that and our headgaskets are pretty famous parts as well. With that being said, 7psi is what is recommened, but nothing is a guaruntee when you boost the 420a.

I know a lot of people will check their compression first before boosting...you can rent a compression tester from most auto part stores if you don't feel like buying one. Most get around 150 to 190 ruffly across all 4 cyclinders. This is because some test it when the motor is cold and some check it hot. You want to have all 4 cyclinders within 10 of each other, but perferably closer is better.

So once you find out your compression its off to boost land, and I know some that boost 5psi and blow a ringland and some are still boosting 10psi all day long and are fine. Every car is differnt and it all depends on your supporting mods and not doing something stupid in the process of it all. You want to do everything right the first time and don't cut corners on certain things. People wonder why our cars our down a lot..this is the main reason, and the other is they are over 10 years old for some and some rapidly approaching that.

I could sit here and go on and on for hours, but if I were you I would read up for a while before you take on this project. I mean that is half the fun, and if you don't know what your doing...how will you trouble shoot all the problems you will encounter along the way?

Plus tell your friend to read up a little as well...and becareful who you take advice from...take everything with a grain of salt and research everything.

Good luck with your project!

--------------------


- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

Originally posted by Blizare
I boosted 7 psi for 12k and then 10 psi for 42 seconds. Take that how you want to.

I contributed to the Wiki!
EVO IX - just a really expensive boost gauge and a K&N air filter
96 Eclipse RS -awaiting registration and inspection
95 Eclipse GS - parts car
Mods/Profile - http://www.2gnt.com/index.php?d=cs82685

Amen to ^^^ that brothar!

I agree, luck has everything to do with it. I've had numerous times when I spike 12psi on stock motor, feels good but scares the hell out of me. Even had one go to 16, God only knows how my engine held together. I only had 42k miles when I boosted now I'm at 49k and other than melting the wires because of the EGR tube and a bad oil leak I'd say go for it. I never figured 8psi would make that much difference, but it did.

I <3 boost

I contributed to the Wiki!
EVO IX - just a really expensive boost gauge and a K&N air filter
96 Eclipse RS -awaiting registration and inspection
95 Eclipse GS - parts car
Mods/Profile - http://www.2gnt.com/index.php?d=cs82685

I contributed to the Wiki!
EVO IX - just a really expensive boost gauge and a K&N air filter
96 Eclipse RS -awaiting registration and inspection
95 Eclipse GS - parts car
Mods/Profile - http://www.2gnt.com/index.php?d=cs82685

like 70 more horses? holy turbo spool batman! I am not one to condone bench racing, I just was wondering if it would be worth it and apparently it is. now i just have to get my car in a reliable state.

iv been running 6-8psi on the stock block for 2 1/2 years now with no real problems . i guess im pretty lucky

LED tails : Done for now!
99 eclipse rst
cobalt blue met. paint,star stage 2 upgraded t3/t460trim turbo ceramic coated , polished compressor housing, ,optima yellow top, chrome i/c piping ,front mount ntercooler ,apexi turbo timer . zeitronix wb02 ,faze oil ,boost gauge,egt ,bosch 4x plugs,kyb agx struts, pro kit springs.17''adr venomous rims,Falken azenis ,brembo dilled/slotted rotors ,turbo xs bov ,oil catch can,manual shiftknob,autometer pyrometer egt , vortech sfmu,b&m fuel pressure gauge ,accel 310cc injectors ,gasketmatched and polished intake manifold ,58mm throttle body ,no egr,polished turbonetics wastegate,fuel pump rewire,homade fcd and a lot more .LED reverse lights ,sidemarkers and tails .atx to mtx swap . South bend tz clutch . Tons more
http://imageshack.us>


http://www.2gnt.com/index.php?d=boosted60trimrst
My contribution to the wiki
http://www.2gnt.com/index.php?d=crank%20arm%20spindle%20mod%20to%20fit%20power%20panels

Ive been boosting for almost 3 years now. Im at 5 psi at 108,000 miles. Its been boosted since probably around 70,000 miles. But I did get a new headgasket put in and had good compression.
-Todd

Star Stage II, Greddy Type S, ADFX 3" DP, blah blah blah

I've been boosted for about 8 months now on the stock bottom end, and I run 10psi daily, with no problems as of yet. The key is to get your fuel setup correct, a good tune, and get a reliable boost controller that wont spike on you. Oh and Megasquirt is the shit

95 GS-turbo: SOLD
92 Laser AWD- has a lot done, needs a lot more...
88 Suzuki Samurai- Daily beater/mudder

Originally posted by GreenRicer
I've been boosted for about 8 months now on the stock bottom end, and I run 10psi daily, with no problems as of yet. The key is to get your fuel setup correct, a good tune, and get a reliable boost controller that wont spike on you. Oh and Megasquirt is the shit

I contributed to the Wiki!
EVO IX - just a really expensive boost gauge and a K&N air filter
96 Eclipse RS -awaiting registration and inspection
95 Eclipse GS - parts car
Mods/Profile - http://www.2gnt.com/index.php?d=cs82685

Originally posted by cs82685

Originally posted by GreenRicer I've been boosted for about 8 months now on the stock bottom end, and I run 10psi daily, with no problems as of yet. The key is to get your fuel setup correct, a good tune, and get a reliable boost controller that wont spike on you. Oh and Megasquirt is the shit

10 psi huh? what turbo and have you been using megasquirt the entire time, what else does your fuel system consist of? SOrry for all the questions, but as long as my car lasts till I'm out of school in May, I wanna turn the boost up some

_____________________________________


http://www.dsmregistry.com/detail.php?carid=1133
*form follows function*

Originally posted by cs82685

Originally posted by GreenRicer I've been boosted for about 8 months now on the stock bottom end, and I run 10psi daily, with no problems as of yet. The key is to get your fuel setup correct, a good tune, and get a reliable boost controller that wont spike on you. Oh and Megasquirt is the shit

10 psi huh? what turbo and have you been using megasquirt the entire time, what else does your fuel system consist of? SOrry for all the questions, but as long as my car lasts till I'm out of school in May, I wanna turn the boost up some

95 GS-turbo: SOLD
92 Laser AWD- has a lot done, needs a lot more...
88 Suzuki Samurai- Daily beater/mudder

I <3 boost

I contributed to the Wiki!
EVO IX - just a really expensive boost gauge and a K&N air filter
96 Eclipse RS -awaiting registration and inspection
95 Eclipse GS - parts car
Mods/Profile - http://www.2gnt.com/index.php?d=cs82685

When all of you said 8psi, is it 8psi to the motor or 8psi + pressure drop = 6 psi ?. Im boosted since 2 months now, 8psi set at wastegate but with pressure drop my gauge see 6 psi. For now im on stock injectors so ill not play more now but im planning 30lbs and sfmu next summer and was thinking to connect my wastegate vacuum to intake instead of turbo.

I contributed to the Wiki!
EVO IX - just a really expensive boost gauge and a K&N air filter
96 Eclipse RS -awaiting registration and inspection
95 Eclipse GS - parts car
Mods/Profile - http://www.2gnt.com/index.php?d=cs82685

I run stock internals @8psi (Garrett GT28RS turbo) with stock injectors (for the moment). I have had the same lean conditions from FMU issues and bad fuel pumps like others with no horrific results, though I do have EGT warnings and such to tell me when to get off the gas. I've been running it for months now and even ran it for a few weeks @10psi. At the track I pulled a 14.4 with an auto tranny and it shifting into 4th on me at the 1/8th mile (bad TCU). Its a crapshoot with our motors. If you understand that you can kill the engine if you push its limit, you won't be surprised if it happens.

Jamie-
-AUTOMATIC turbo'd 95 Talon ESI@8psi (stock internals)14.0sec=1/4 mile

-2003 Mitsubishi Evo VIII

last october is when i first boosted my 420a. some of you might remember the issues i had but i was on 5psi for about 4 months then got 30#ers and stepped it up to 10psi. ran great til two months ago. i drove like a grampa on the streets but raced every weekend and didn't do too bad. the ring landings on piston-3 had 3 cracks, #4 had 4 cracks and the rings shifted till the openings wher right on eachother. smoked like hell from the oil catch tank. just got wiseco8;8/1 pistons and eagle h-beams in and breaking those and the new clutch in right now. oh, and my clutch slipped @ 10psi on a second consecutive run. every time.

got that megasquirt!

I boosted on stock internals and wish I never did it. Bro. I wish I would of waited a few more months to afford a rebuild with forged internals. I ran 8psi for one month, deployed for 3, came back, and it blew within the first 2 weeks I was back.

Although I ran it a little hard (maybe real hard), I wouldnt of had that problem with a rebuild and a tune. Which is the direction I'm taking now.

-Custom Hahn Racecraft Stage 2 Kit.
-Hahn FMIC
-2.5 Downpipe (Upgrading to 3")
-270cc injectors (Upgrading to 550cc)
-16g Turbo/8 lbs (Upgrading to 17lbs with mechanical boost controller)
-Custom FPR (Upgrading to S-FMU)
-Wiesco 8:8:1 CPR Pistons
-Eagle H Beams
-ARP Main/Head studs
-Centerforce dual friction stage 3
-Dyno Tune Comming Jan-07...