CLASS RACER FORUM - Plug to piston clearance?

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art leong

12-05-2012 07:12 PM

Plug to piston clearance?

How much clearance should I have? Minimum? This is a hemi style chamber with the plug inthe center of the chamber. Pent roof piston, top of dome is under the plug.

pmrphil

12-05-2012 09:07 PM

Re: Plug to piston clearance?

I would think (depending on RPM, bearing clearance, etc.) .035 -.040 should be plenty. At .030 I have seen a bit of contact at higher RPM (7200-7400)

Mike Taylor 3601

12-06-2012 10:17 AM

Re: Plug to piston clearance?

usaully if misses without gasket (.039) will be fine,I always make sure plug is'nt shrouded
by piston, probaly won't be on hemi style.
Mike Taylor 3601

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