S
stevec
Guest
What brand and heat range plugs are you guys using for High boost over 25 psi.
I have an early set of the original GN1 race heads which had some of the worst threads. So I had the spark plugs holes heli- coiled. Now I have to run the gasketed spark plugs and not the tapered seat plugs.
Here is what I have found for the gasketed plugs.
FR2LS stock AC Delco
FR1LS 1 colder AC delco
Autolite
3922 1colder
3923 stock
AR 3933 2 colders big boost clip gapped
Anybody using NGK's have the correct number for the gasketed spark plugs.
Thanks
Steve C
I have an early set of the original GN1 race heads which had some of the worst threads. So I had the spark plugs holes heli- coiled. Now I have to run the gasketed spark plugs and not the tapered seat plugs.
Here is what I have found for the gasketed plugs.
FR2LS stock AC Delco
FR1LS 1 colder AC delco
Autolite
3922 1colder
3923 stock
AR 3933 2 colders big boost clip gapped
Anybody using NGK's have the correct number for the gasketed spark plugs.
Thanks
Steve C