760+ WHP Time-Attack Toyota Supra - Turbo Upgrade | ALPHA 8 Fabrication 

B58 all the way

Vr30 can achieve 750 whp on z1 turbos. When built it can achieve 1000whp on ams alpha 10 turbos. The vr30 has more bore 86mm, and a stroke of 86mm, the vr30 can achieve more rpm therefore more hp than the b58. The b58 has a bore of 82mm and 94mm stroke, stroke gives more torque but less rpm therefore less hp. The b58 is has a lot of torque, but that doesn’t matter nearly as much as hp. The vr30 is the more capable engine, the only difference was that the b58 had more aftermarket support, which the vr30 is now catching up to.

stock block built trans

GTX35