331 Stroker Plugs & Timing?

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FeTTstang

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Nov 21, 2006

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#1

• Dec 1, 2006

• #1

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.

 

ProKiller

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#2

• Dec 1, 2006

• #2

autolite 3924s

 

F

FeTTstang

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Are they gonna be colder than the NGK TR4's?

 

95cobraguy

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Dec 23, 2005

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Dec 1, 2006

#4

• Dec 1, 2006

• #4

ProKiller said:

autolite 3924s

Click to expand...

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.

 

ProKiller

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no clue, but that's the plug that pretty much everybody runs.

 

F

FeTTstang

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95cobraguy said:

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.

Click to expand...

I have iron P heads tho. Should I still run the autolite 3924's still?

 

OrangeMustangGt

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Dec 1, 2006

#7

• Dec 1, 2006

• #7

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.

 

WhiteDevil

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Dec 1, 2006

#8

• Dec 1, 2006

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WHy would you need super cold plugs for your stroker? I run Autolite 3924s(stock heat range) on my 347 and they work great.

 

F

FeTTstang

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#9

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It does not work with the stock plugs it pings, my tuner told me to try colder plugs.

 

legalize420

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Dec 1, 2006

#10

• Dec 1, 2006

• #10

FeTTstang said:

I have iron P heads tho. Should I still run the autolite 3924's still?

Click to expand...

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

 

F

FeTTstang

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#11

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I think I will get some autolite 103's and see how they work.