[robchalmers]

I think the RPM difference will make less difference than the load induced by Drag increase at speed. also depends how your fueling - as above is you're running a distributor/carb set up it'll be a world away from a lambda aligned ECU controlled fuelling and ignition system. Mega jolt and Mega squirt are very cool yet accessible systems with amazing 3D mapping potential!! kinda surprised I haven't heard much about folkes on here adapting it for eco-ing rather than POWER!!!!!!!!!!!!!