You gotta love these guys When he held it in third (I think) for about 10 seconds at 10k RPM that was just brutal. Not so bad if the engine belongs to someone else I suppose
Over 10k sounds mental, its like it does not want to go any further and something is about to go wrong - but just carries on! Is this the highest anyones ever revved one to consistently?
Why not just have the crank balanced and use a decent harmonic balancer? **** load cheaper and does the same thing pretty much. That engine was never going to make power that high up with no changes to inlet manifold runner length, volume etc, I suspect the cam profile would need looking at also.