I have been going nuts over which turbo I should run for my H22 setup.
My goals are 400-450 whp on pump gas & 500-550 on race gas. Also looking for a streetable powerband with quick spool and good response.

Naturally for quick spool and good response I was looking at the GT30's but my concern is top end power with the 30R's. A lot of people here suggest that the GT35R is a very good choice for the H22, but I am worried that the power will come on too violently for a streetable powerband. Any thoughts? I will probably get the .82 turbine housing on all of the turbo choices listed above.

I just saw a thread today talking about the spool times on the 35R and that sounds pretty reasonable for a turbo of that size. Just would like to know how the power comes on with the 35R. Please point me in the right direction before I go crazy!

 

Incase you needed it again:
https://honda-tech.com/zerothread/1915348

I posted that thread asking about the spool characteristics of the GT35R, not sure if that helps any.

I would also like to know how the powerband is like for the GT35R

 

the GT30's are going to run out of breath short of 550whp....if you NEED that much power go w/ the GT35R

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">the GT30's are going to run out of breath short of 550whp....if you NEED that much power go w/ the GT35R</TD></TR></TABLE>

Would you know how much sooner the GT30's would spool over the GT35R? Does anyone have a dyno graph of an H22 running a GT30R turbo?

It would be really nice to have 550whp on race gas just to mess around with at the track or something, but I would definitely prefer having a useable powerband in the street, so I probably don't NEED that much power.

 

it might be nice to have 550whp at the track but think of the nicer powerband you'd get with the GT30R

 

I am selling my Gt35r t4 thermo coated housings
make great power just going to 42r now
email me israelkmohammed@tmo.blackberry.net if your interested
made 590 @ 25lbs of boost 2l GSR

 

sagaboy3100
you got any dyno sheet using precision GT35r t4 with 58 housing turbine 70 ar cold on that estimated whp? 590@25lbs





Modified by SupaFly at 6:34 AM 3/22/2007

 

gt30r can make 550whp....

remember jeff evans' post?

here
https://honda-tech.com/zerothread?id=1454640

 

yeah i seen that.. 30r on 32psi...
im refering to 600hp on 25spi on this 35r with small housing .58
https://honda-tech.com/zerothread?id=1923514
19psi made 463.

 

Borg Warner S258 anyone??

 

With your displacement I dont see a reason not to go with a GT35RLS with the larger A/R turbine housing. It will spool good and make the peak power you're looking for with a great powerband. The car Jeff Evans tuned to 550whp if I remember correctly he mentioned backpressure was getting to be too high at that level

 

if you can settle for low 500's i would definately go 30r, but if you are leaning more towards 550+ then go 35r its as simple as that. 35r should still have a great powerband but no need to get bigger than you need. im happy with mine on my 1.9 liter but ive also driven 30r setups and you can immediately notice a difference in the powerband.

 

35r gets man handled by the hseries my personal experience i sold mine brand new after the first dyno tune .i say 35 minimum

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xsi-t &raquo;</TD></TR><TR><TD CLASS="quote">With your displacement I dont see a reason not to go with a GT35RLS with the larger A/R turbine housing. It will spool good and make the peak power you're looking for with a great powerband. The car Jeff Evans tuned to 550whp if I remember correctly he mentioned backpressure was getting to be too high at that level</TD></TR></TABLE>

With the smaller turbine having a better spool time and powerband, if it SAFELY makes the power you want, what's the problem with high backpressure?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">With the smaller turbine having a better spool time and powerband, if it SAFELY makes the power you want, what's the problem with high backpressure? </TD></TR></TABLE>

I asked similar questions a long time ago. After talking to people like Tony1, Jeff Evans, Mase and doing my own research I came to the conclusion the smallest turbine to reach excessive power goals isnt ideal. If backpressure starts to become excessive, which it probably will at that power or boost level with that turbine, it's going to lower the knock threshold. The less backpressure the higher the knock threshold or combustion efficiency is going to be; to an extent. To each their own. If he can hit his goals with the 30R more power to him. If it were me I would go with the 35R. Enough rambling I want to see another 500+whp 10 second H22

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alpha &raquo;</TD></TR><TR><TD CLASS="quote">I asked similar questions a long time ago. After talking to people like Tony1, Jeff Evans, Mase and doing my own research I came to the conclusion the smallest turbine to reach excessive power goals isnt ideal. If backpressure starts to become excessive, which it probably will at that power or boost level with that turbine, it's going to lower the knock threshold. The less backpressure the higher the knock threshold or combustion efficiency is going to be; to an extent. To each their own. If he can hit his goals with the 30R more power to him. If it were me I would go with the 35R. Enough rambling I want to see another 500+whp 10 second H22 </TD></TR></TABLE>

I too have talked to many experts on the topic and usually get similar replies. Smaller turbine side has higher backpressure, which means more reversion, which leads to lower knock threshold, therefore makes less power. But is bigger always better? It seems most hondas even street cars run large turbine sides, sometimes larger than necessary and compromising their powerband for peak rpm hp.

My questions is if the smaller one is proven to be capable of safely making your power goal on the fuel you will use, ie it is within your desired knock threshold, albiet with high backpressure, what is the problem with that? Although it loses peak rpm hp it gains a more streetable and usable powerband, which would make the car faster overall on the street. Seems to me its generally just a compromise between what is more important to you.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22 civic &raquo;</TD></TR><TR><TD CLASS="quote">35r gets man handled by the hseries my personal experience i sold mine brand new after the first dyno tune .i say 35 minimum</TD></TR></TABLE>

explain please. what was your setup and 35r specs?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">I too have talked to many experts on the topic and usually get similar replies. Smaller turbine side has higher backpressure, which means more reversion, which leads to lower knock threshold, therefore makes less power. But is bigger always better? It seems most hondas even street cars run large turbine sides, sometimes larger than necessary and compromising their powerband for peak rpm hp.

My questions is if the smaller one is proven to be capable of safely making your power goal on the fuel you will use, ie it is within your desired knock threshold, albiet with high backpressure, what is the problem with that? Although it loses peak rpm hp it gains a more streetable and usable powerband, which would make the car faster overall on the street. Seems to me its generally just a compromise between what is more important to you. </TD></TR></TABLE>

I agree to an extent but were not talking GT30R or T3/T67 P trim or similar. I still think the GT35R is going to have a streetable and usable powerband on an H22 and safely make 550whp. And I am sure once he hits 550whp he is going to want a little more. We always do My last setup I used a GT3076RLE on a 1.8. It was fun but I decided I needed to go larger after 22lbs on pump gas I recently had a customer move from a GT3076RLS to a GT35RLS but on an SR20DET. The GT3076RLS made 430whp @ 21lbs/22lbs on pump gas. Even though we have not been back to the dyno with the 35RLS he is just as happy with spool and happier with power output even though it probably isnt too much more on pump gas

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BB6-213 &raquo;</TD></TR><TR><TD CLASS="quote">

explain please. what was your setup and 35r specs?</TD></TR></TABLE>

do a search under my name in for sale its to long to repost but the short end is i felt after 27 psi the turbo was out or breath it made excellent power per boost up to 23-25 psi (low 500s bye 20 psi)but the motor had a lot left it was a 35r 70 cold 82 hot full built h22 ,tranny blah, blah my above post said man handling meaning as far as spool time i hit the gas and this thing went rite to full boost no prob at all and that is what i think the original poster was looking for i was getting the feeling he thought it wouldnt spool fast and was thinking going the 30..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">do a search under my name in for sale its to long to repost but the short end is i felt after 27 psi the turbo was out or breath it made excellent power per boost up to 23-25 psi (low 500s bye 20 psi)but the motor had a lot left it was a 35r 70 cold 82 hot full built h22 ,tranny blah, blah my above post said man handling meaning as far as spool time i hit the gas and this thing went rite to full boost no prob at all and that is what i think the original poster was looking for i was getting the feeling he thought it wouldnt spool fast and was thinking going the 30.. </TD></TR></TABLE>

Not everyone is going to make HT expected numbers Off topic but that was a clean EK