Plug gap for aluminum heads?

[fidstang]

Just wondering what gap everyone is running on their N/A aluminum head applications?

 

[Rick 91GT]

Same gap as stock around .053", I played with gap when using my MSD since they say you can go wider and I never saw any improvents when data logging. I actaully had high success with a .040" gap on my old NA combo, they burned better.

It depends on you head, quench are and cam timing, start at .053" and go from there.

 

[fidstang]

Same gap as stock around .053", I played with gap when using my MSD since they say you can go wider and I never saw any improvents when data logging. I actaully had high success with a .040" gap on my old NA combo, they burned better.

It depends on you head, quench are and cam timing, start at .053" and go from there.

Thanks, I'll give that a try. For some reason they were gapped at .036".