Pullig

Heres my question i have a 95 prelude with H23 no-vtec. Im spraying about a 50 shot with 0.036 nitrous and .024 fuel. My a/f are perfect like i want them good and rich. I do have it at stock timing.

I also am running the NGK 7 heat range which is 1 degree colder because stock is 6s. Well when i checked the plugs aftr a wot pull i noticed a slight pre-ignition sign on the porcelain.

Some very tiny black specks not too major and i noticed very slight amount of aluminum specs which would indicate pre-ignition. Well my question is that i really dont want to pull any timing i would like to keep the distributor at stock setting.

Could i get NGK 8 heat range and clear this up and gain more power than pulling some timing? Im wanting to run a 75 shot here soon just after i get my jets. What would be the corresponding fuel jet to use if im using an 0.040 jet for nitrous?

Cuz i would liek to keep the a/fs just like they are now . I was thinking of using a .028 ..

SOHC_MShue

pull timing

slowhonduh93

retard timing yo.... otherwise by using a colder plug than you have... its not going to help you with any of your problems... do it right or let your engine go boom....

Phase Change Racing

You need to take a couple degrees of timing out and a lot of fuel. .036/.024 is Wayyy too rich. You will cause a lot more harm than good running that rich.