The 8 blade takes less power to turn. And then it says it’s about 10 HP at 7000 RPM. I can guarantee that that 10 HP is nothing compared to the HP loss from 160 degrees to 195 degrees, plus the fact that those high coolant temps make the engine much more sensitive to detonation so you can’t run as much compression (power and efficiency loss) and you can’t run as aggressive cam timing or you will be into detonation.
