[IMR-Merlin]

Hi all,

I have a built engine with Ruf 3.4 P&C installed. I have a rap that is throttle (engine load) based. It comes on at light throttle and can be held through out the rev range until I add power or reduce power. I am leaning toward piston slap and have heard that some or the Ruf 3.4 pistons were short skirt and prone to this. Anyone on this forum have any input?

Thanks in advance

Brendon