Ok I know the recommended are as below…. Generally well a good starting point…

MSD + NA = 0.50 gap
MSD + boost under 8psi = Stock gap
MSD + boost over 8psi = 0.34 MAX

Anyway what I question is what unit’s are the above measurements taken in is that millimetres (mm) or inches (‘)

Because if there mm that’s a very small gap when boosting over 8psi.


Regards James

 

James, those numbers are in inches, and it should be .050, .034, etc. I've been running .032 gap with my plugs at 12psi w/ an msd 6al setup.

 

Great looks like my original source of that information forgot the extra 0 !

Thanks for clearing that up !