Turbo / Gate questions

[Maj]

Hey

Read up as much as I could before posting, sorry if its been covered before, please fwd me the link.

My mate has a T3/T4 Turbo with a Trial 38mm gate on his Busa, producing 270hp. He tells me this set up was a cheap way of getting extra power.

My question is, what turbo and gate works best for higher power figures, keep in mind the bike is not a street bike so there are no restrictions on clearance etc.

is the T3/T4 turbo (say from a nissan) ok to use? is a 38mm gate to small?

Thanks

Depends what boost level he is running , which t3/t4and how far he wants to go,
270 is probably around 10 psi, with the right mods and race fuel like c16 he could go to 25 or so psi before running out of the efficancy zone of his turbo , a bigger turbo like a bigger t3/t4 or gt35 would make more power at a given boost level but at a cost of more lag.
38mm wastegate is good for most turbo's , probably be getting too small if you went huge like a gt40
What supporting features like engine build , electronics & fuel system are you planing