No2 Plugs

[coralcoupe1993]

I may spray the notch with a 75-100 shot (wet kit). What pugs should I run???? It has TFS heads so now I have Autolite 3924s.

[coralcoupe1993]

Well the TFS TW heads take an autolite 3924. What should I gap these pigs at?

[Viper_ed]

I'd go 2 heat ranges cooler than stock with that much nitrous and gap them at .028.

[Pure Stock]

Colin, higher cylinder pressures developed by high compression, large camshafts, blowers and nitrous oxide, not to mention the RPM ranges we run our engines at while racing, make colder plugs mandatory to eliminate plug overheating and engine damage. The colder type plug removes heat more quickly, and will reduce the chance of pre-ignition/detonation and burn-out of the firing end.

On weaker or stock ignitions, opening up the gap CAN increase the spark kernel size, thereby creating a more efficient burn. The problem lies in that any added gap creates more strain on the other ignition parts.
Coils may not have enough stored energy to fire, or in the least case, not enough energy to cross the gap, creating a miss-fire.

*General* Guideline for V8 engines reduce gap about .004" for every 50 hp shot you add (Higher output ingnitions *can* allow for the gap to be opened up somewhat.)

[Rodeheaver's]

i would say go with a .030 gap and use that as a starting point for tuning, and deff 2 steps colder to be safe but the plugs may want to foul out during normal driving.. if you need some help come and give me a visit.

[coralcoupe1993]

Cool. Since the No2 is just an idea, I will just keep these plugs! oh and they are at 30.