Dome radius

[Ron Gusack]

Am I close to having enough radius on this dome? Should the piston deck be done where the intake eyebrow meets it? I'm trying not to lose more dome than necessary and it's a bracket engine.
[IMG[URL=http://s246.photobucket.com/user/rgusack/media/DSC01048_zpszflcpysx.jpg.html]

[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

[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.

[Mike Taylor 3601]

yep should have plenty of room,LOL
Mike Taylor 3601