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· Registered
590 Posts

The lift you have takes into the rocker ratio, .340 cam lobe lift X 1.5 rocker = .510 at the valve. you should have the clearence checked between the retainer and valve seal , as well as the spring setting at the maximum lift for ciol bind.

· Premium Member
16,270 Posts
Hey whats up guys! lets say my heads have a max lift of .540 and im using a cam that has .507 and .510 lift if I'm using 1.5 roller rockers am I going to have a problem?
507=338 at the lobe
510=340 at the lobe

338 x 1.6= 540.8
340 x 1.6= 544

they do have 1.52 and 1.55 ratio rockers from differant company's.

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