how many psi is the gt30r efficient to? i'm sure teh gt35r can make more power on less lbs but what about the powerband? if a gt30r can do 471 @17 lbs but it's efficient up to 30lbs then i'd rather get the gt30r and boost 25-28lbs and have 500+whp with a broader powerband.

 

all this talk of big turbos make me feel like my t3/t4 57 trim .63ar feel like a t25

i want the gt35r bad

 

here's the problem

at 25 psi the charge air temps would be very elevated.. combine that with street use (stop and go driving, traffic) the intercooler gets heat soaked. at this point detonation becomes a problem.... the lower the psi the denser and cooler the charge air is... thats what im looking for

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Flamenco-T &raquo;</TD></TR><TR><TD CLASS="quote">

it's the largest compressor wheel, 94mm ex, 74mm in. 1.01 A/R on the hot side.

It's actually for sale...

stan</TD></TR></TABLE>Maybe I'm missing something, but the Garrett catalog has a 102mm Exducer/74mm inducer GT42 and a 94mm/70mm GT42 wheel. I don't see a 94mm/74mm GT42 wheel.

A 62 trim really doesn't seem like it would be all that appealing for what most of us are trying to do with larger turbochargers. Large trim wheels generally have terrible efficiency at high pressure ratios, which is where most of us will need to be to justify some 90+ pound/min turbo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by flip1199 &raquo;</TD></TR><TR><TD CLASS="quote">how many psi is the gt30r efficient to? i'm sure teh gt35r can make more power on less lbs but what about the powerband? if a gt30r can do 471 @17 lbs but it's efficient up to 30lbs then i'd rather get the gt30r and boost 25-28lbs and have 500+whp with a broader powerband.</TD></TR></TABLE>


yeah it is good to 30psi or so and 17psi with 471whp is no joke on pump with fast spool