Hey

I'm questioning which turbo would best fit my application, Here it is: 95 gsr, J.E. 9.1 cr pistons, eagle H beam rods, GE block guard, 660 cc injectors, Hondata s200, 3" exhaust, walboro fuel pump, aem fpr, rev hard manifold, stock head.

I would like to reach 350-400whp, before 15 psi. Is this possible with one of these turbos?

Let me Know

 

why before 15psi, you have futur plans? just max out a t3|t04E .57 and youl be in that 350-400whp range...go bigger if you have futur plans...

BTW:who's tuning your car in montreal?

 

I've heard that stock sleeves start getting weak after 15 psi.

I still looking for a good tuner in Montreal. Do you know any?

 

I got the feeling that your a boost addict so I would pick the GT32E.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95GSRT &raquo;</TD></TR><TR><TD CLASS="quote">I've heard that stock sleeves start getting weak after 15 psi.

I still looking for a good tuner in Montreal. Do you know any?</TD></TR></TABLE>

15psi is totally meaningless. Your sleeves will start getting weak after a certain stress on the motor(power output) NOT how much boost you run through it.

 

You could bust stock sleeves at 6 psi if you lean out and detonate enough. The amount of boost has nothing to do with sleeve failure. It has to do with tuning and as mentioned above, your power level. I'd say stock sleeves are fairly reliable until the 400whp level, provided the engine was tuned properly. But some people have made more power than that on stock sleeves. How long did they last is the question.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kleefton &raquo;</TD></TR><TR><TD CLASS="quote">You could bust stock sleeves at 6 psi if you lean out and detonate enough. The amount of boost has nothing to do with sleeve failure. It has to do with tuning and as mentioned above, your power level. I'd say stock sleeves are fairly reliable until the 400whp level, provided the engine was tuned properly. But some people have made more power than that on stock sleeves. How long did they last is the question. </TD></TR></TABLE>

This is so true. I was talking to a mustang guy that had the biggest turbo I have ever seen on a car. The a/r was a 1! The guy was running around 550-600hp on 3PSI. The psi is not the thing to look at. It the volume.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kleefton &raquo;</TD></TR><TR><TD CLASS="quote">You could bust stock sleeves at 6 psi if you lean out and detonate enough. The amount of boost has nothing to do with sleeve failure. It has to do with tuning and as mentioned above, your power level. I'd say stock sleeves are fairly reliable until the 400whp level, provided the engine was tuned properly. But some people have made more power than that on stock sleeves. How long did they last is the question. </TD></TR></TABLE>

What he said lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95GSRT &raquo;</TD></TR><TR><TD CLASS="quote">
I would like to reach 350-400whp, before 15 psi. Is this possible with one of these turbos?
</TD></TR></TABLE>

W/ that compression, No.. Not 400 before 15psi. The closest that will do that is the GT3037 and 60 Trim. Then you're looking at about 15psi or slightly more.

All of these are great choices. Make sure that you're choosing it to fit YOUR needs. Not some Internet dick stroke stuff...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 95GSRT &raquo;</TD></TR><TR><TD CLASS="quote">I've heard that stock sleeves start getting weak after 15 psi.

I still looking for a good tuner in Montreal. Do you know any?</TD></TR></TABLE>

I would be worried about 15psi on stock sleeves. The beat in block guards will distort the cylinders and you should definetly hone the cylinders oversize after driving it in.The blocks cast surfaces are not accurate enough not to distort the cylinders. The tune up and engine management would have to be right on.

 

umm, no. they sleeves will be fine.

search around..plenty of people have made 500+ whp on stock sleeves and they ahve lasted.

a good tuner in mtl.... none..lol. im not sure.

 

Thanks for all the input guys. Still questioning which turbo is best. I'll take the risk with the sleeves. Personally I'm leaning more towards the gt30r. Which of these turbos has the best spool, and which will make 350-400whp with the fewest psi

 

Well, let me take a shot at this. Here's a breakdown by turbo:

SC34 - 545 peak hp at crank, 463 peak hp at wheel

GT3071RLE - 440 peak hp at crank, 374 peak hp at wheel

GT3076RLE - 520 peak hp at crank, 442 peak hp at wheel

GT3255E - 380 peak hp at crank, 323 peak hp at wheel (guesstimate)

GT3257E - 420 peak hp at crank, 357 peak hp at wheel (guesstimate)

All figures are approximate and depend on state of tune up on the vehicle. Remember that you power at the wheel will be lower since you're not running the turbo at peak. One of the other responders was right in that volume, not boost is what matters most.

With that in mind, the SC34 would be the best choice because it would give you more airflow at lower boost levels. However, the GT30R has the most efficient compressor wheel (78% at 22 lbs) & would spool quicker because, in part, of the ball bearing center section. Give me a call if we can answer any other questions.

Rod Short
Sales Manager
Precision Turbo
(219) 996-7832
8-5 Central Time

 

thanks for the info Rod, very help full.generally with the gt3076rle, by what rpm would I have full boost? as well as the sc34? which one has better spool time?

 

bump

 

I dont know for your turbo related question... but for your tuning... you have only one choice.

http://www.tappauto.com

Mat

 

The GT3076RLE would spool quicker. Hard to really say when you would get full boost. We're not an install shop, so we don't get a lot of this info. Too many variables to really give you a firm number, but certainly before 4,000 rpm.

Rod Short
Sales Manager
Precision Turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rod Short &raquo;</TD></TR><TR><TD CLASS="quote">The GT3076RLE would spool quicker. Hard to really say when you would get full boost. We're not an install shop, so we don't get a lot of this info. Too many variables to really give you a firm number, but certainly before 4,000 rpm.

Rod Short
Sales Manager
Precision Turbo</TD></TR></TABLE>

Hey Rod, (Mac @ Speed Trapp)

We found that on a B18c1 ON AVERAGE for the the SC34, spool started at about 3200-3300rpms and reached full boost by about 4000 or so. This has put 3" exhaust, high flow cat, and 2.5" downpipe into account.

I agree w/ Rod, either the SC34 or GT32E would make a great choice is staying in a Journal-bearing. Precision uses 360 degree thrust bearings as opposed to Garrett's standard 270 degree bearing. This means longer life in the long run.

BTW. Tell Jim he Don't call me no more

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Rod Short &raquo;</TD></TR><TR><TD CLASS="quote">
GT3255E - 380 peak hp at crank, 323 peak hp at wheel (guesstimate)

GT3257E - 420 peak hp at crank, 357 peak hp at wheel (guesstimate)
</TD></TR></TABLE>

These guesstimates seem really low. Could you do me a favor and look up the actual numbers? I'm considering the GT3255 for 350whp on a LSVTEC. Thanks.

 

Hey Mac . . . Jim's on vacation right now, but I'll pass the message on next week.

I agree that those numbers sound low, but Garrett tends to understate their ratings. This came straight out of their catalog. You could probably add 25-30 hp and still be quite safe.

Rod Short
Sales Manager
Precision Turbo

 

I got this from Precision's website:



It says 520 for the GT32. Is that accurate?

 

Yea, I have the GT32E, I thought it was good to wayy over 357, like at least 450whp. . .

 

im pretty sure the gt32e is good for 500-520 flywheel hp

 

Okay, if the web site says so, I'll go with that.

Rod

 

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

With that in mind, the SC34 would be the best choice because it would give you more airflow at lower boost levels. However, the GT30R has the most efficient compressor wheel (78% at 22 lbs) & would spool quicker because, in part, of the ball bearing center section. Give me a call if we can answer any other questions.
</TD></TR></TABLE>

Hey Rod,

You mention that the SC34 gives more power at lower boost. What would be the benefit of that, since people in this thread feel that boost is not a limitation rather hp is? I mean, couldn't you just run the faster spooling turbo and up the boost to hit the hp levels you want?