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Whats about the average max, is it like .540 and 280^. Does it matter if its stock valve sizes or not?
 

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Hmm.. hard to say. It depends more on valve size and duration of the cam. I'm running 1.90's and a 224* intake w/.542 lift and 1.60's with a 232* w/.563 lift exhaust and had to grind only slightly into the intake valve relief.
 

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Yeah, it's all about the duration, not the lift. I have .544 lift with 1.90 intake valves and stock pistons with no probs.
 

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Well, I ran stock intakes, 1.6 exh with a Lunati cam(Ron Anderson Custom) with .535/.544 on 226*/236* on a 110 CL for many years. No fly cutting either..........
 
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