hey guys, ive got a 393 , aluminum heads, moderately built with a lightning efi system on it. any thoughts on what kind of gap i should be running on the plugs? thanks!

 

Off the top of my head I'd recommend ~.045" for starters. If you're feeling adventurous open the gap up ~.0025 at a time until it starts to stumble at WOT and then close it up one step, measure, remember for future reference.

 

thanks alot!

 

.044 should work nicely.