Dome radius

[Ron Gusack]

Originally Posted by Mike Taylor 3601

I would make sure spark plug isn't blocked or hit by dome,if so and piston has enough material I would cut slot/notch in dome for spark plug so it isn't blocked. Not only will this keep from smashing gap together,but will be able to run less timing.
Mike Taylor 3601

Thanks Mike, I'm putting this closed chamber piston in an open chamber head so I think the chances of the plug interference are slim. I'm hoping a fire slot isn't necessary because I think the dome height is low enough. Grumps old book says the dome radius should be 1/4 inch, so I guess I have more to do.