Venomous281

iTrader: (11)

Ive got a 4.8 Silverado I plan on throwing a S475 in. A friend gave it to me since he didn't need it anymore, I was wondering if anyone has run one with a T6 1.32 A/R before on a 4.8. I plan on going with a custom boost cam, tbss intake, ported 243's milled down to achieve a c/r of 10:1 or so to help the 4.8 spool the s475. If im wrong on this some advice would help me a lot. Im also going to run a 4L80 with a 3600 yank. The setup will be a log style system, 80lb injectors, LPE 340 pump till I do a return style fuel system.

mrstepheneades

S475 will feed it good. Boost may not come in till 4000rpm depending on turbine size. But I love this turbo. Dependable and is making great power on my ls1. My boost comes in at 3500rpm making about 5psi at that point and full tilt at 4100-4200rpm. I have the 1.32a/r and 96mm turbine.

hellbents10

iTrader: (10)

It will be very very easy to put the wrong cam in it, other then that it would be great on the 4.8, expect full boost by about 4600rpm with a reasonable waste gate spring in it.

BMF_Racing

iTrader: (6)

Keep your hot side pipe size as small as possible to help it spool. To bad its not the 1.10 turbine side version, it would be more at home on a 4.8, but what you have will work just a touch more RPM to spool. Good luck, it will be fun.

Venomous281

iTrader: (11)

Would a 2.25 pipe be too big?

Forcefed86

iTrader: (4)

Probably. Depends how much power you want. 2" should support 1000 crank....or so a few of the "pros" say. Would be really interesting to see how fast boost came on with that combo. I'd look into a something small like the isky 212/212/ 112 cam. It's been proven to work very well on a few 4.8's.

dezlfrek

iTrader: (1)

you can have a 1.10 made for it. I'm going with a 475/87/1.0 on my 4.8 with a 38-4k stall.