Hey everyone. I have a 95 5-speed with a 331 stroker with 10-1 compression with GT40P heads and TFS intake and cam. I have NGK TR4 plugs and I cant get it timed right. They are the coldest plugs that NGK has for the 302. I have tried every timing setting from 8-14 and it pings at no matter what I have it set at. I have also tried one step hotter plugs earlier and it still pinged. What plugs should I use for this motor? I dont care what brand and I don't want fancy platinum ones either. Any help would be great.
331 Stroker Plugs & Timing?
- Thread starter FeTTstang
- Start date
95cobraguy
Member
i agree. get rid of those ngk's (which belong in nissans) and put the autolites in (which belong in fords with aluminum heads). if u want a colder plug than the autolite 3924 than u can go with an autolite 3923, 3922, etc.
OrangeMustangGt
Founding Member
If you have gt40 p heads, then you need autolight 104's or 103's for a colder plug.
i run 103's with 10lbs of boost ob my gt-40p heads and they are cold enough, but you might still be able to use a 104 n/a
the plugs people are talking about above are not for gt-40p heads, which take a special plug due to sparkplug placement for "fast Burn" combustion chambers.
i run 103's with 10lbs of boost ob my gt-40p heads and they are cold enough, but you might still be able to use a 104 n/a
the plugs people are talking about above are not for gt-40p heads, which take a special plug due to sparkplug placement for "fast Burn" combustion chambers.
WhiteDevil
New Member
WHy would you need super cold plugs for your stroker? I run Autolite 3924s(stock heat range) on my 347 and they work great.
legalize420
Active Member
i think the 3924's are for aluminum heads. i read that iron gt40 heads use autolite 764's. i know thats what i had in mne. i went to the 103's for nitrous
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