Hey guys, my ZEX plugs failed after a weak, so I was wondering which NGK's are the cold ones that I should be running with n2o..

Thanks!

 

1033's= bcpr7es

 

The most common for Hondas would probably be either of these two.

NGK BCPR7EY-11 (14mm Thread, 3/4" Projected Tip, 5/8" Hex .042"gap)
NGK BKR7E Non-projected tip

Both these plugs are 7 heat range. Going from a projected tip to a non-projected tip is equivilent to 1/2 heat range colder.

 

Which of the two are better? Do either require gapping? If so, what should I gap them to?

Thanks

 

How about HKS S45i heat range 9?? Good for Nitrous?

 

how about some champion copper plugs. they happened to work well for my friend running nitrous too..