I just started my car today and it sounds like it missing. Plugs are due so Im going to start there. I was considering using NGK Copper V-power plugs R5672A-8 and gap at .35. Did some searching but no clear answers so can anyone suggest a good plug for my set up, I know some people like the coppers. Comptech S/C 8-9psi AEM EMS RC injectors. Any advise would be so helpful.
Thanks guys

 

Most people use NGK Iridium BKR8EIX (NGK 2668) and love them. I'm one of those people.

 

^ X2.

 

I had my car at the dyno the other week. I am running BKR8EIX and 12.5+psi on a SOS kit. It was breaking up at around 7.8-8k, sounding as if it was hitting a revlimiter. I had left the stock gap which was .32 I beleive. While the car was still on the rollers, I pulled the plugs and gapped them to .25. Reinstalled them and the car spun trouble free to it set 8500 rpm.

I am running this plug gap setup for now. However, I plan on getting those Okada coils or the BAS and running the BKR8EIX at their stock gap.

 

BKR8EIX or ik24 gap'ed to 25. The cooper plugs you mentioned are equivalent to the BKR8EIX but doesn't have resistors so it might interfere with the cars electronics and induce problems. For some guys they work but for other don't.

 

Same here. Gapped to .024. Currently being tuned @ PTuning. So far no issues. And yes the plugs you use should have a resistor in them.

 

Thanks guys, started a new thread as plugs didnt solve