93 twin turbo mods (was 93 GT)
Posted: Wed Sep 26, 2001 7:51 pm
well i dunno josh... There are a couple schools of thought here...
The primary one here, is the one that most drag racers use. Take out BOTH
turbos and just replace it with one big turbo, say something to the degree
of a t78. That's something that TT Supras, RX-7s, GTOs, and 300zx's have
been doing for a while. yes, this will increase turbo lag, but depending on
your setup, it may not be too terrible. this setup will indeed give you the
most reliable horsepower. mate this to a 3 inch exhaust from the turbo back,
increased fuel and spark; and you'd have yourself one damn fast legacy.
Another thing to do would be to see if there is an upgrade kit available
that would increase the size of both turbos. This would keep them
proportionally similar to the stock design.
What you were saying about overspooling the primary turbo may or may not be
true. When it comes down to turbos, if you want horsepower, you don't want
your cats.
Tim, you won't want to have both turbos coming on at the same time, that
defeats the purpose of the twin turbo design - small turbo for boost at low
rpms, and the biggun will take over and make big boost up top.
So to recap: A) get 1 big turbo. B) get a replacement kit that increases
both turbos proportionally. C) free-er flowing exhaust is always better for
turbos.
-Jason
>From: "Josh Colombo" <jcc189@psu.edu>
>no I do not believe so, I don't think it would produce good results, how
>the plumbing is setup to the turbos, also, I'm not really sure how boost
>would come on, and such.
>
>The thing that is going to produce the best results, for your particular
>car and config is to get a larger exhaust, cat-back. DO NOT remove the
>cats, you will overspool primary turbo. Then get a larger secondary
>turbo, for more boost/power at higher rpms.
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The primary one here, is the one that most drag racers use. Take out BOTH
turbos and just replace it with one big turbo, say something to the degree
of a t78. That's something that TT Supras, RX-7s, GTOs, and 300zx's have
been doing for a while. yes, this will increase turbo lag, but depending on
your setup, it may not be too terrible. this setup will indeed give you the
most reliable horsepower. mate this to a 3 inch exhaust from the turbo back,
increased fuel and spark; and you'd have yourself one damn fast legacy.
Another thing to do would be to see if there is an upgrade kit available
that would increase the size of both turbos. This would keep them
proportionally similar to the stock design.
What you were saying about overspooling the primary turbo may or may not be
true. When it comes down to turbos, if you want horsepower, you don't want
your cats.
Tim, you won't want to have both turbos coming on at the same time, that
defeats the purpose of the twin turbo design - small turbo for boost at low
rpms, and the biggun will take over and make big boost up top.
So to recap: A) get 1 big turbo. B) get a replacement kit that increases
both turbos proportionally. C) free-er flowing exhaust is always better for
turbos.
-Jason
>From: "Josh Colombo" <jcc189@psu.edu>
>no I do not believe so, I don't think it would produce good results, how
>the plumbing is setup to the turbos, also, I'm not really sure how boost
>would come on, and such.
>
>The thing that is going to produce the best results, for your particular
>car and config is to get a larger exhaust, cat-back. DO NOT remove the
>cats, you will overspool primary turbo. Then get a larger secondary
>turbo, for more boost/power at higher rpms.
_________________________________________________________________
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------------------------ ---------------------~-->
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CLICK HERE to search
600,000 scholarships!
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