340 nitrous plugs

[aaronk785]

I’m going with a 100 shot on my 340. I have SM heads. Can I run a projected tip plug since the plug is recessed so much. Ngk 6 projected or ngk 7 non projected? Nitrous will be used to race only. 80% street 20% track.

 

[flyfish]

If it were me, I would use NGK R5671A-8's....The R5671A-7's is probably fine too at that level, you just don't want too hot of a plug...and no to the projected tips.