I'm getting a lot of conflicting information on plug gap for FI and type of plug required. I currently run NGK-TR55 Irridiume at .055" gap at only 6.6psi.. I've been told to close gap to .035" for a improved performance and gas mileage.
What have you found to work best?

 

I recommend the NGK TR6 gapped at .035

 

I run the TR6's as well

 

TR6 .035 here. seems to be the standard radix answer.

 

TR6 .035 is what I ran with the radix and with the turbo.

 

Thanks for posting your experience. Looks like I will switch to TR6 and close the gap to .035" to see how this will work for me.

 

Mike, that's what I'd tell ya too I run the same at the same gap most of the time.

 

no conflict here!

 

same here

 

Go with the ones I gave you ... LOL .... thanks for your help today