Originally Posted by
Canada1
Hello Rob,
As you can see from Crazycage's experience - 160 hp @ 6psi and your 105 hp @ 5 psi.
Even at those very low boost pressures appx. 50 hp difference.
I don't think I would be too far off saying 80 hp gain is in the proper head/inlet manifold when boosting at 1 bar is possible.
Cheers
I agree, but you are somewhat ignoring the larger exhaust housing, different inlet manifold, cam etc etc. The 55bhp difference is not JUST down to the head @ 6psi. I don't think an 80bhp gain at 1bar is realistic, @14psi an rst makes maybe 160-170 bhp in standard form, so 240-250bhp from 1 bar with just a very good head and manifold isn't going to happen. Look at Karlos's engine, superb head, a good newmans cam high Cr etc and he is making 230 @ a lot more than 1 bar. Even with a larger exhaust housing i still don't think he would see 240-250bhp @ only 1 bar and i think he has a very well spec'd engine.
I do stand to be happily corrected! I think jam sport have an engine making 360 bhp at 22psi??? which has had A LOT of development and has a GT30. This i doubt is over 200brake @ 1bar.......
Rob,