Sorry, I'm only quoting the manufactures. The figures come out of the US hence their preference to stating crank HP. To give a guide in KW's 727 HP is about 540 kW at the engine, or just over 400 at wheels.
I get confused too as when people ask me what HP my GT makes I tend to say around 700 but I am refereing to power at the wheels (not crank).
At a guess to make 727 they would be up around the 9psi mark. with 680 around the 6 psi using a larger diameter pulley.






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