Quote:
Originally Posted by Coheed
I did some testing with this turbo. The .82 reached boost onset quicker and made 30whp on the same 24psi. I didn't notice any degradation in throttle response either on an SR20.
Playing around with this turbo I found that the 6-blade non-gtx compressor sounds incredible. Like a jet engine spooling. The GTX doesn't make any noise. The T30 turbine does seem to be pretty restrictive given the size of the compressor. The GTX3576r is a better match overall, the smaller ar housings will want more boost to compensate.
I like to keep the exhaust free-flowing, it lowers backpressure, EGTs, reduces pumping losses etc. The T350 turbine in the GTX3576r is much better suited for what the GTX wheel can flow. Don't forget that improving the exhaust backpressure will also improve VE, and depending on the engine can offset the loss of transient response gained by going to a larger volute. At least, this is what my personal testing shows.
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thanks for the info.. appreciated. i have to contradict your statement on the gtx30r's 11-blade wheel being quiet. @
Sportsguy83's definitely has the jet engine noise
. not so much as @
Ironsquid's 35r, which is insane, but it's definitely there and noticeable.
i haven't really decided for sure what i'll do for the turbo. the 3576r actually sounds like a decent option as well, and more people are pushing me towards the .82 housing. decisions decisions...