turbotaws6

I want to make about 800rwhp. I have a 408 rearmount turbo with a t70. Its a 6spd. its making about 625rwhp at 8psi right now. How would a st76 work? Or would a gts76 work better? Or should i go bigger? Ive looked around theres not much info for rearmounts making this much power so i would appreciate your input.

DrTurbo

iTrader: (3)

ST76 would make more power and would spool the same as the 76GTS, but the packaging is a little larger. We have the 76GTS's as well and they are great units.

OHSIXCTSV

^ i know a few rear mounts that make power in that ballpark.
my goal is 500-550 rwhp (with bone stock ls2) and will be using
either a gt60 or gt67. at @ 8 psi
so my guess is your on par with your goal...
any pics of your setup? and good luck!

Jake@EPP

We used a 76GTS on a 408 butt mount car, it had a .81 EX housing. The top hp number was right around 700rwhp on 11#.

Spool was somewhat an issue, boost came on around 3800-4000. This was majorly due to having the SLP long tubes and a full 3in exhaust.

Going to a 4in downpipe made a huge diffrence though. Even though its a small run, the stocker 3in was a big restriction.

turbotaws6

How would the st76 fit in the back due to its larger size? How musch biggers is int then the 76gts. What ar would guys recomment its about 98% street 2% track? & no i dont have pics yet. i have fmic with no meth but the meth will go back on soon.

DrTurbo

iTrader: (3)

ST76 is about 1" larger on the comp cover. The unit with a 1.10A/R would spool fine.

turbotaws6

Do u know anyone that has put a st76 in the rear? & if it would have problems fitting?

DrTurbo

iTrader: (3)

Zombie on this board has an ST80 in the rear.

turbotaws6

How much smaller is a st76 then a st80? cuz i know a st80 is pretty big?

DrTurbo

iTrader: (3)

Externally same size.

abbaskhan

go with the 80 and a .86 ar
wrap everything!!! use stock manifolds have them ported make sure u dont use to big of an exhaust or a peaky cam

turbotaws6

Who else makeds a good 80 trim & who makes the best 76 trim?

turbotaws6

So ive been hearing about a bunch of 76 trims. which would be better for my application & y? 76gts, gt42 76r, st76, or a tc76 or tc78. is there much difference between these? which 1 would you choose & y? i just dont want to run out of effiency towards the top

OUTLAWZ RACING

iTrader: (9)

I have a gts 76 numbers in the sig. How the hell did you get 625 on 8#? Best mine did was around 590. And I would go with a st80 due to the fact my tq falls off at 6600 rpm.

ninetres

iTrader: (35)

So shift.

OUTLAWZ RACING

iTrader: (9)

right

CamaroSS19

iTrader: (24)

I would go with the 80 even though I think they are little tooo big for a rear mount ,the bigger turbo is needed with the 408

Zombie

iTrader: (2)

I'd personally go with an 88mm if I had a 408, but I use an automatic transmission.

vandal0-0

iTrader: (3)

I run a Garrett t88 out back with my 408.

Mike @ New Era

iTrader: (10)

What about the GT4294 , should work well with this set up .