Hey cyrk, was wondering why "cooler" is better in the combustion chamber, I am needing new plugs and trying to decide betwen the 20's or 22's. i have a s/c with a 5psi pulley. I will probably get the 20's since you are satified, just confused on the "why cooler is better" part.
Super VXer
To lower the temperature of the combusting air and fuel is to run cooler heat range spark plugs. Many supercharger manufacturers will recommend cooler plugs for supercharged engines. Go with the IK20, 22 is way overkill.
VXer in the Sky
I'm running 16 of these in my AMG and they rock. Alpine does NOT recommend a cooler plug with their SC kit.
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