Well decided that i am going turbo on my next set up. I have been reading all i can an researching to find out all i can and be informed about what i am doing. I am going to do a rear mount gt76 set up. I like the concept and idea of the rear mounts and my buddy has an STS kit and built motor and that thig flys! I talked to sts about what a/r i should run. They told me to run .96, he said there will be plenty of exhause to spool that thing. he also said he saw a similiar set up where the guys was hitting peak boost at 4000. To me it just sounded like that is a high a/r. I plan on spinning 6500 out of her. Just not that familiar with them.

also is it alot more bennificial to run a ball bearing turbo vs. a regualr one?

Any help would be great guys!

Thanks
chris

 

Full boost by 4? I plan on it around 2 for me.

I am not a fan of the sts style, although I honestly can't say anything horrible about it.

My best advice is lots of planning. I am putting my stuff together now and close to starting mine up, but coming from a high compression / nitrous motor I have had to change almost everything in the car.

What are you power or time goals. Whats the use of the car. All that jive

 

just drive it for fun, want 800 - 900 rwhp. no time goal, going to do it right. i am in the same boat, just had a high compression nitrous motor too.

I know alot of people are not fans of that set up, Its all in the turbo selection. I did all the math and figuring out what i need. i came to the conclusion that i need a t-76 .96 a/r Q-trim.

I would rather be a bit big and use a 50 shot to spool the thing then be small and flat line on the power.

 

Why stop at a 50? lol. I would consider doing a reverse curve progressive setup on anything that was slow to spool. But I am only shooting for @ 600 to the wheels and a super fast spool time.

Keep us updated. I got my heads on last night, so I'll have my day soon.

 

On the topic of STS kits, I have a friend that had an STS kit on his 02 WS6. With Florida thunderstorms and flash floods he eventually hydro locked his motor. Fortunately he didn't trash the motor by bending a rod or anything, but he did remove the kit after that happened. They are proven to make plenty of power and have a unique sound, but not best suited for a DD IMO.

-Pete-

 

Not going to happen with a butt-mount turbo.

 

It can happen with a rearmount... just not the turbo he has picked out

12sec94z28 - I think you will see peak boost somewhere between 4500-4800rpm with that turbo and A/r. Do alot of reading on ls1tech as they have more guys running rearmounts over there. I dont think you'll come close to 800rwhp with that T76 because you wont be able to push that turbo hard neough with it mounted in the rear. You'll need 18-20psi to hit 800rwhp with a T76 (and a stout engine), and you'll be lucky to get 15psi out of it.

Dont be surprised if its a bit laggy and you only make 550-600rwhp @ 15psi. You will need some serious heads/cam to get you to where you were hoping to be.

 

so what do you guys recomend for the turbo and what a/r? I called sts and asked what power their kit made with that turbo and all of the specs and he told me that it would be in the neighborhood of 700 at 15 pounds but i would still be able to turn it up. He said it woudl be capable of 900 plus HP.

The specs of thoer kit with a T-76
were .96 A/R
Q-trim

 

You could hit 700rwhp... but your heads better be damn good. I dont see much more than that though with it at the rear. Start with the .96 housing, it will be laggy though, but give it a try. Its easy enough to switch the housing out.

 

The Q-trim exhaust housing will be a terd, though. The GTQ is better and the GTS is better still. A T76 Q-trim will NOT make anywhere near 900 rwhp. In fact, no T76 in a butt-mount will get anywhere near that.

 

I'm shooting for about 700RWHP and I'm running an intercooled PTK front-mount kit with that same turbo while running fully ported AFR LT4 heads and a full custom bottom end. You'll definitely have to go with a different setup to get to those power levels. Get a stout bottom end and add a lot of juice if you only want to go rear-mount and hit 900RWHP.

 

I was seriously looking at the T-76GTS kit from PTK. Let me know any #s or track times or install or pics or whatever...just holler at me. Very interested in your set up, thanks.

 

You wont have a problem hitting your numbers....

 

The highest I've heard of from a PTK kit with T76GTS is 990 rwhp and 152 mph in the quarter. He swapped to a T88 and it went 1010 rwhp and about 156 mph. However, for most people, the kit with the 76GTS will only go about 750 rwhp (auto) or 850 rwhp (m6). That equates to 900-1000 fwhp at 355 - 383 cid.

Mike

 

I have the option to get the the s trim. Is there a better route for me to go al togeather? I would be satisfied with 700 rwhp. Would it be better to make this a front mount set up? If so would the specs on the turbo need to be different like the a/r? I want someting that has an abundace of power bbut dosent have horrible lag. I am new to turbos and am trying to learn all i can. I sold my 93 z race car with a built 396 to build this turbo car. It went high 9's so i would like this one to do that too.