Spark Plug Selection Information

[Hodgie1013]

Here is a little insight that I found helpful. Just thought others may have similar querys...

"• Supercharging/turbocharging: With increased pressure and temperature in the chamber, two or more heat ranges colder may be needed. Extreme high-boost race-only applications may need a surface-gap plug."

http://www.carcraft.com/techarticles/sp ... index.html