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Junior SCH Member
What plugs to use with aftercooler\s-trim?
I have an S-trim and just added an after cooler setup and a 2.75 Pulley\7.00 crank pulley with GT-40 iron heads. Not sure on the boost, but at 2.95 I was seeing 10lbs. I currently use AWSF-22C ford plugs which are 1 heat range colder. I was thinking of going to a NGK TR55IX plug because of the after cooler. Should I be okay with those plugs? Thankx.
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Senior SCH Member
Just go with plugs that are 2 ranges colder than stock. Either the autolites or the Motorcrafts.
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