Quote Originally Posted by bart View Post
2871 are good for about 370-380 max.. so ive been told...
I think you will find that is incorrect. A GT2871R with 0.86 A/R will make 385+ Axel Bhp on a good SR at 1.3 bar boost and I have seen 400 Axel Bhp on SR's we have built using this turbo at 1.4 bar boost. On E85 we would see about 20 bhp more.

A GT2876R with 0.86 A/R will make 420+ Axel Bhp at 1.3 bar boost and 450+ at 1.5 bar. Again on E85 we get about 20 BHP extra.

A GT3076R 0.86 A/H will make 480+ axel bhp. And a GT3076 1.01 A/R will make 500+ axel bhp easily.

Robbie