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. Also if anyone knows how they rate plug temps let me know.
10-1 331 stroker, what plugs and timing?
- Thread starter FeTTstang
- Start date
blksn955.o
Founding Member
TR4 are hotter, NGK gets hotter as the number gets smaller. Stock should be a TR5. I run 1 step colder with a TR6 to go 2 steps colder you need to go with an irridium(sp?) plug and its a TR7i or TRi7.
I run iron gt40 (non-p's) heads with 10.33-10.6 comp. depending on what side of the +/- on cc production variance I am. With the Tr6 plug I am not having any det. issues with the EGR hooked up on 91 or 93 octane (ran 1/2 a tank of 91 as it was all there was).
I run iron gt40 (non-p's) heads with 10.33-10.6 comp. depending on what side of the +/- on cc production variance I am. With the Tr6 plug I am not having any det. issues with the EGR hooked up on 91 or 93 octane (ran 1/2 a tank of 91 as it was all there was).
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