flarhoades

I have a gt91 and currently building a 408. I want to know if I'm wasting my time? Should I build it and see what happens or sell the 408 and build something smaller?

HexenLord

..... another one of these?

What exactly are you expecting not to happen by running it on your 408?

flarhoades

A lot of people have been telling me the 408 is getting ran down in the big end by stock displacement 6.0L. I've put a lot of money towards this build and don't want to go in the wrong direction.

slowlsx

iTrader: (28)

The right combo with any displacement is going to fly, its not all about cubic inch. Dont overthink it, build your motor and let it eat

cjmatt

iTrader: (4)

What size turbine wheel and A/R turbine housing? I honestly think the ideal setup would be an S483 bullseye with a built 4.8 and good set of heads. nobody seems to have built one though

You just need a bigger hotside and itll work fine with the 408 though. Look at Joses GT55's theyll work great on a big 408

Cam72aro

iTrader: (28)

408 gt 91/ 94 here. Runs really well. Build it and let it eat.

flarhoades

It's a gt91 with an ar housing of .75 with a t6 flange. Do you think this is gonna hurt me.

trans2000am

iTrader: (49)

Wow that ar is tiny are u sure that's correct? U will run out of stem quick

flarhoades

I'm a post pic of the turbo but you can change these ar housing correct?

Cam72aro

iTrader: (28)

I didnt think that housing was an option. I thought .96 or 1.08. Is it a t6 or t4 flange?

flarhoades

I can't post the pic but it says .75 are they interchangeable and yea it's a t6 flange

SPRAYED 01

iTrader: (22)

Comp ar?? No way that is the turbine side ar

flarhoades

On the intake side it says a/r. 75 I'll have to look at the exhaust side tonight by the way how do you attach a picture here

hardbodeez

iTrader: (10)

What?

Ask Skinnies how often his car gets ran down in the big end.

Cam72aro

iTrader: (28)

A big inch motor with a big turbo will make more power period. It's just in sizing and combo. On the extreme ends put a 600+" motor against a 4.8. Both with twin turbos, who will win?

rotary1307cc

iTrader: (5)

More turbine. That is the same turbine as the standard pt88

HexenLord

Depends on the turbos.

Cam72aro

iTrader: (28)

Sized correctly a big motor will win every time, it moves more air. I know a lot of little motors that run good, but a 300" motor vs a 706" or bigger has the advantage given the right turbos are installed. It builds more torque and more hp,