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Forum nameTurbo/Nitrous Tech
Topic subjectSome basic turbo tech chat between murix and I
Topic URLhttp://forums.2gnt.com/dcboard.php?az=show_topic&forum=8&topic_id=16165
16165, Some basic turbo tech chat between murix and I
Posted by Mystic511, Dec-31-69 06:00 PM
Thought this would be interesting for those who don't know too much about turbos:

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MUR1X: when did they introduce purple M&M'S??
Mystic511: purple??
MUR1X: yeah
MUR1X: I am eating some now
Mystic511: that's the one that only like me and two other people voted for
MUR1X: there are a lot of purple ones in this bag though
Mystic511: dark or pastel?
MUR1X: dark
Mystic511: maybe they were suppose to be blue, but m&m fucked up?
MUR1X: they have blue ones though
MUR1X: purple yellow purple blue purple brown purple green purple red
MUR1X: blah
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ok, so that part had nothing to do with turbos, but i thought it was funny.

things have been edited to make sense, and also to cut out the crap talk. =P
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MUR1X: which sounds like aS20G to me ;)
MUR1X: and defeats the point since a S20G will actually accomplish what I want
MUR1X: but I do not want the lag
MUR1X: Bill once spoke to me about a possible BB option - that might be my solution
MUR1X: but the argument I had was that the A/R housing is too large so the turbo does not spool till late in the game
MUR1X: a S20G starts spooling when a S16G does but the larger wheel makes the process itself take longer
MUR1X: going bb would make a S20G very much like a S16G and what I want
MUR1X: but that is assuming it is possible - Bill did mention it once to me
MUR1X: I guess that would be the cheapest ideal route for me to go
MUR1X: I want midrange - lag = peaky
MUR1X: same stupid shit as vtec
MUR1X: area under the curve means a lot more
Mystic511: s20g with BB = good.
Mystic511: that's all i got from that.
Mystic511: heh
MUR1X: yes :D
MUR1X: hehe
MUR1X: the downfall of the super turbos is their single selling point
MUR1X: the 10cm A/R housing
MUR1X: the A/R house sizing determines when initial spool-up occurs
MUR1X: wheel size determine how long spool up will take
MUR1X: that means bb would cut down on total spool up time but not when it begins to spool
MUR1X: the advantage of larger housing is less backpressure, no boost creep, and more overall flow
MUR1X: a big 16G flows 550 where a S16G flows 575cfm
MUR1X: a 20G flows 650 and a S20G flows 680cfm
Mystic511: awesome
Mystic511: you just cleared up turbo tech for me in 5 mintues
MUR1X: hehe oh :)
MUR1X: another consideration is that lag is actually good for fwd because a small fast spooling turbo can break the tires
MUR1X: but their is a window between too much and not enough lag
MUR1X: I am determined to stay in it
MUR1X: for a streetable fwd the S16G does quite well actually
MUR1X: long gears help traction too
Mystic511: yea, i think s16g is a really good turbo.. that's why i decided on hrc instead of star
MUR1X: the star turbo is fine but I want to knwo who sized it
MUR1X: it is weird on paper to me
Mystic511: it's stupid.
Mystic511: =P
MUR1X: I want to know if those guys get compressor surge
Mystic511: the BB option was the only thing that made me interested in star
MUR1X: I doubt it
MUR1X: the BB is overhyped
MUR1X: Greg has it
MUR1X: I am asking him when he makes 16psi by
MUR1X: he makes 16psi at 4200rpm
MUR1X: he dynoed 283@15psi
MUR1X: Armond makes 18 at 3800-4000 and dynoed 324fwhp
MUR1X: go figure
Mystic511: heh

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16166, RE: Some basic turbo tech chat between murix and I
Posted by MuRiX, Dec-31-69 06:00 PM
I should mention a few more things.

A lot of this is my mindless rambling. Yes I think turbo to myself all the time. :)

A larger turbo actually helps with reducing backpressure, heat, egt's, and detonation. A large turbo will be rather laggy yet allow more TOTAL maximum power on pump gas because of less detonation. There is a lot more to it than that. In fact, I think the only reason Greg got away with running so much boost with so little trouble might be this reason alone. Who knows. In theory it works. (THIS IS THE OVER-SIMPLIFIED EXPLANATION.)

I am mostly concerned with area under the curve which affects streetability so I am looking for a compromise between quick spooling and large which I have yet to completely find. I have a few turbos in mind but some of it will lead me down the custom route. That is process of mind ramblings.

It all depends on what you want, how you use your car, and your future goals/plans.

Oh, and I really do want to know when they introduced purple M&M's?
16167, RE: Some basic turbo tech chat between murix and I
Posted by Greg, Dec-31-69 06:00 PM
>Oh, and I really do want to know when they introduced purple
>M&M's?

Murix you always yell at peeps for posting in the wrong section and you post about Purple M&M's in the Turbo Section??? What's up with that?? TAKE IT TO THE PITS! :P Damn Moderators these days
16168, RE: Some basic turbo tech chat between murix and I
Posted by DarkOne, Dec-31-69 06:00 PM
Guess i'm not alone on my laggy T3/T04e..
16169, RE: Some basic turbo tech chat between murix and I
Posted by whodatt1, Dec-31-69 06:00 PM
so I guess i should not worry about my 10-12psi peaks on my t3/t04E when the westgate does not open.. ;) hehehe


16170, RE: Some basic turbo tech chat between murix and I
Posted by vegasdsmr, Dec-31-69 06:00 PM
i had a conversation the other day with a fellow dsmr about my needs from a turbo, and we were talkin bout a super 20g w/10 degree clip for better top end.

i dunno shit yet about turbos, but i luv to learn :-)
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