Phoneguy
Cometic HG stress tester
- Joined
- Aug 27, 2002
- Messages
- 6,879
I'm using Denso "iridium" plugs that are factory gapped at .040 and I am using at the factory setting. According to Denso the iridiums take approx. half the voltage to fire as standard plugs and withstands heat well.
I am running 12/14 psi of boost thou with pump gas and the car has run 10.80's with the working air off. So it's making some power and the car has not missed yet with that wide of a gap. If I were to push the boost up to the low 20's I would close the gap to .035/.032 to start off with to be safe. Car runs clean on the street with the TT street chip.
At that low of boost I doubt you will see an issue with an .040 gap but I would not push it.