recently upgraded my t3 60-1 (0.63 a/r) turbo on my b16a with a GCG turbo GT35R ( been fitted with a 1.06a/r turbine housing and a 66mm t04R comp wheel)
the best time we ran with the 60-1 was a 9.93@147mph at 34psi, this set up was very fun to drive and was always in the power band on gear changes.
since changing to the larger modified GCG GT35R the car is very lazzy and laggy between gear changes (best time we ran was a 10.81@139mph at 27psi).
i shift at 9000 and am on stock b16a cams.
i have recently bought CTR cams and am going to fit them.
my question-
has anyone had a similar combo (to large turbo/small engine) and added NOS to combat the lag?
what were the results?
im trying to get 30psi at around 7000rpm.

 

i see no need to spray that setup,.

the b16 cams were probably not making any power up there, while the CTR's will widen your powerband, you can rev higher, thus falling back into a larger power window. maybe try shifting faster

have you thought about going to an LS or GSR bottom end ?

 

You could try a smaller exhaust housing.

 

You have b16 cams, a b16 block, and a 9k redline. It's no wonder it doesn't work.

Put some ITR cams in it and rev it to 10.5-11k or swap it to a bigger B block (ls or gsr) and rev it to 10k.

 

How much compression are you running? You could pick spool up quite a bit with 10:1 or higher.

I agree with turning it higher, but I would redo the whole head setup to take advantage of that.

The nitrous will definately be an easy fix, but mine hits the tires pretty damn hard. It also may make your car illegal for SFWD if you have a swap...or whatever the class will be. Maybe it won't. I don't know what chassis you have.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4piston &raquo;</TD></TR><TR><TD CLASS="quote">How much compression are you running? You could pick spool up quite a bit with 10:1 or higher.


</TD></TR></TABLE>

Not really, the compression makes very little difference in spool. Displacement does WAY more for spool.

 

I'm sure people have different results.

 

have u thought of going to a smaller AR? .82? and 30psi on that turbo not gonna happen unless u have a pretty plugged up motor, and if that was the case id port the head, bigger cams, etc.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaveF &raquo;</TD></TR><TR><TD CLASS="quote">i see no need to spray that setup,.

the b16 cams were probably not making any power up there, while the CTR's will widen your powerband, you can rev higher, thus falling back into a larger power window. maybe try shifting faster

have you thought about going to an LS or GSR bottom end ? </TD></TR></TABLE>

yeh will try spinning it to 10,000 next time out with the new CTR cams, i have thort of going with a bigger LS or GSR bottom end, just cant affort it at the moment.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Garcia-Racing &raquo;</TD></TR><TR><TD CLASS="quote">You could try a smaller exhaust housing. </TD></TR></TABLE>

yeh we thort of changing to a 0.82 rear housing, just hoping the back pressure wont go to high.
when we had the t3 60-1 with the 0.63 it had 65psi backpressure at 34psi boost, now with the new turbo is 25psi backpressure at 27psi boost..... just were we wont it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 4piston &raquo;</TD></TR><TR><TD CLASS="quote">How much compression are you running? You could pick spool up quite a bit with 10:1 or higher.

I agree with turning it higher, but I would redo the whole head setup to take advantage of that.

The nitrous will definately be an easy fix, but mine hits the tires pretty damn hard. It also may make your car illegal for SFWD if you have a swap...or whatever the class will be. Maybe it won't. I don't know what chassis you have.

</TD></TR></TABLE>

comp is at 9-1, the class we run is called Front-Mod and it allows 2 power adders, so turbo and the use of NOS is ok.

 

if it is allowed then why not spray it? even if you swap to a 1.8


Modified by ilovuall at 5:41 PM 1/9/2008

 

You definately need a smaller turbine housing!

 

Rev it, Spray it, and then see what happens.

 

you can make power higher, get some $50 gsr cams, and rev it to 10k. i let off at 9900 in my b16 w/gsr's, t3 62-1 .82, and the graph was still climbing when i let off.

 

its all about exhaust gases, more displacement, better cams, or change the aspect ratio

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX11Z &raquo;</TD></TR><TR><TD CLASS="quote">recently upgraded my t3 60-1 (0.63 a/r) turbo on my b16a with a GCG turbo GT35R ( been fitted with a 1.06a/r turbine housing and a 66mm t04R comp wheel)
the best time we ran with the 60-1 was a 9.93@147mph at 34psi, this set up was very fun to drive and was always in the power band on gear changes.
since changing to the larger modified GCG GT35R the car is very lazzy and laggy between gear changes (best time we ran was a 10.81@139mph at 27psi).
i shift at 9000 and am on stock b16a cams.
i have recently bought CTR cams and am going to fit them.
my question-
has anyone had a similar combo (to large turbo/small engine) and added NOS to combat the lag?
what were the results?
im trying to get 30psi at around 7000rpm.
</TD></TR></TABLE>
Do you still have the unported head fitted as well ?
Regards Dyno Dave

 

As others were saying some bigger cams would definately help too.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX11Z &raquo;</TD></TR><TR><TD CLASS="quote">recently upgraded with a GCG turbo GT35R ( been fitted with a 1.06a/r turbine housing and a 66mm t04R comp wheel)</TD></TR></TABLE>

GT35r's are really not that lazy. I think your combo is a bit of a mismatch.

Starting with the B16 engine the compressor you have is plenty and you shouldn't need nitrous. All you have to do is rev to 10-10.5k and you're going to make tons more speed down the track.

But your turbo is also an issue. The GT35 backside you're running is not enough to keep pushing that 66mm compressor to high rpm. If you want the most out of your compressor your turbine side needs to give you leverage and this turbine wheel is wasting alot of energy just to keep this compressor going.

The right backside for that 66mm is atleast a GT37, GT40, P trim etc. I wouldn't be surprised if you achieve the same backpressure and spool you have now w/ a ptrim and .82ar but it would open your up compressor up considerably.

Mismatch combos like this show good results at low boost levels because the compressor never really has to spin hard enough to reach the point that the turbine gets overworked. In your case I think you reached that point and opening things up with the big AR in back just hurt your spool even more.

Get a straight GT40 on there and rev to 10.5k I bet you like it alot better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dyno Dave &raquo;</TD></TR><TR><TD CLASS="quote">
Do you still have the unported head fitted as well ?
Regards Dyno Dave </TD></TR></TABLE>

head has been mildly ported in behind the valve seats and knife edged

 

Have you degreed the cam in? Just wondering what your centerlines are?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CNCPORT.COM &raquo;</TD></TR><TR><TD CLASS="quote">Have you degreed the cam in? Just wondering what your centerlines are?</TD></TR></TABLE>

just fitted the CTR cams. still using stock cam gears