Valve to Piston Clearance

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Originally Posted by tpepmeie

Yes. But was an over rev situation. I design around .060 intake, .100 exhaust. If the driver is sketchy, now I?ll increase that. [emoji5]


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Thanks Todd! Any idea what the RPM's were when the valves touched? And what the clearance was prior to that? Any other contributing factors? I ran with 0.084" exhaust clearance on my '93 motor and never had an issue. I try to stay as close to factory ramp rates as possible.

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