Dirtracer50
05-28-2013, 10:40 PM
Due to rules changing I'm removing my roller cam and installing a flat tappet. It's been a few years since I've played with flat tappets and was wondering about spring pressures. The cam is around .555 intake and .570 exhaust lift in the area of 260 @ .050 duration with the edm lifters. The springs I have will be around 145lbs on the seat and about 340lbs over the nose. Are these safe pressures to run? I will break the cam in without the inner springs and break in rockers. Thanks for any help.