Grizzly

Is the T66 bigger than the Gt3540?

I am looking at running a full BB turbo on a Half Bridge i have a good budget and would have one custom made.

I would like to keep the T4 Footprint but it would'nt be to hard to get a T3 Manifold.

It would be for Road/Track use and i would be running around the 20psi mark, What would you recomend?

Thanks.

680RWHP12A

For a bridge motor i would'nt use anything smaller than a T72! I have a half bridge and that is what i use.. You are headed in the right direction though.20 psi on a t72 with a 13b puts the turbo right in the sweet spot in the compressor efficiency map= turbo efficiency .Since its for road/track use i would use a small hot side , a .81 to be exact/ = no turbo lag comming out of turns. That setup will make 500 whp for sure, i have done it .... chec out this turbo website, they offer a dual ball bearing setup cheaper than the gt3540 www.innovativeturbo.com