I am finishing my nitrous set up (150 wet shot) and switched out the plugs to a NGK part number 3346 (7) heat range gapped to .30. The car ran 2 mile an hours slower and lost a .15 in the 1/4 mile N/A.

My question is does the plug and gap hurt your NA times that much, weather was good so it wasn't that. Just curious, could the gap be too tight?

 

I run BR7's gapped at .30 and it doesn't affect n/a performance at all. That's not the issue...it's from something else