ECOJET

hi ppl
im looking to build a very hipo V6 turbo (L36 type)
assuming its going to run about 8.5:1 comp, im lookin at get a beastly turbo. Im thinking of grabbing a t-76, but obviously i dont want real bad lag, so is there much merit to gettin the turbo but going a smaller housing like a .85 a/r or so? Im looking for it to spooling at around 2500 as im gonna run a 3g stally.
or is it REALLY just too big? even with a smaller exh housing?
** EDIT: turbo would be a ball bearing by the way.

NOSjohn

iTrader: (9)

V6...as in a Stage motor? I know of only a few 3.8 Buicks running a T-76 and they have forged internals AND a girdle on the bottom end. I'm not so sure a "hipo L32" can handle the torque of a T-76. What parts do you plan on putting in this "hipo L32" ? Do you know the block web thickness? Do you know the limitations of the block? I think some other questions need to be cleared up before you worry about lag, stall and what size turbo...but that's just me.

ECOJET

dunno what u mean by stage motor?
it should hold, diamond forged pistons and forged rods, cranks are meant to be pretty tuff.
Stock they are 4 bolt mains (cross bolted)
Who can ever know the limits of a blocks casting... ls1s when they came out ppl said they wouldnt hold more than 300rwkw b4 breaking, that figure has been shattered so much its not funny.

rip the jacker

By "stage" motor NOSJohn is refering to the turbobuick motors in the 80's. I think you are refering to the 3.8 in 4th gen f-bodies. As far as the abuse the block can take, I have no idea. Although a t76 is probably a little extreme for your application. I'm thinking you will see some serious lag.

ECOJET

you're probably right.. it is a massive turbo thats for sure.
But being ball bearing and going with a pretty small exh housing there should be a compromise, maybe a t72 is more my go..

eviltwins

How about a horsepower goal? Trying to recommend a turbo for you is like trying to tell a chick over the phone what bra size she should wear.

ECOJET

lol nice example..
Well hoping to make about 500-550rwhp..

chuntington101

i dont know much about the engine in question, but on a 4 pot aiming for that sort of horse power i would go for a Garrett GT35R with the largest exhaust housing (1.06 i think). Garrett GT's have the best rep when it comes to spool up/lag and run very well at low boost presures as well as high (over 2bar or 30psi).

just my opinion and i have no idea if the engine would be to big for it. another alternative would be a couple of GT2832. these should spool up prety quick (popular on Skylines) and still kick out more than what you want.

Please dont total kill me for what i have said, im a Brit and no naff all about the above engine.

thanks Chris.

eviltwins

If you want 500-550 RWHP why are you looking at a 900 RWHP capable T76?

I kinda agree with huntington. If 550 is your limit and really don't want to push it any harder period amen, then I think the GT35R is a great fit for you. If you want to make a bit more power later on, you might want to look into something a pinch bigger to give you some room to grow. A T66 or T67 would be a nice step that would give you some breathing room past the GT35R.

ECOJET

wow guys i had no idea a t-76 is that big, i looked more into it and i think a t72 is definately the go.. its a 800-850hp turbo so its more than enough.
Or possibly a gt40r, we'll see how it goes

ls1newbie

The T72 is probably way too much for what you want.
We have a GN with a T72, it lags baaaddd. Good luck.

smokinHawk

iTrader: (48)

you proably would want a T63ish for your goals.
should give you the power you set.

JZ 97 SS 1500

iTrader: (2)

For the money the PT63/64E or MP T70 is the way to go. They will spool quite quick and have big top end with the nod going to the T70. The MP T70 will spool fast for a 70mm since its a lightweight shaft vs the Big shaft units like the other 70, 72, 74, 76...etc. The price is also hard to beat. E-mail me if you need any prices.

Jose

RedHardSupra

iTrader: (1)

you can get over 630rw with the new T61 and 680rw with older T63. That's probably what you'd want for your application. How nice is the head, and what type of exhaust manifold do you have?