foxtrot

So I have a 1998 GT and want to try a colder plug say 1-2 heat ranges colder. Yes now that i think about 2 heat ranges colder just to try and knock it out.

Anyone know where I can find the info to select a plug or anyone have any recommendations?

Happy New Year guys!

uedlose

you are gone to have to Google it. all plug mfg. are different. Some go up for colder some go down and then they skip heat ranges for certain plugs

cliffyk

What plugs are you running now, how many miles on them?

What do they look like? I.e. do they look as though they have been running hot?

Spark plug "reading" guide...

uberstang1

Are u running and kind of FI?

Stevo86

2 Heat ranges is hundreds of degrees. I wouldn't drop that much if you aren't running something serious.

uberstang1

On a na motot thats stock with bolt ons there isnt wven a benefit to go one step colder let alone 2, 800rwhp fi only go one step colder.

FrostByte

Getting it data logged or on a dyno would be more productive.