Thread: NGK Spark Plug
View Single Post
Old 08-23-2008, 08:50 PM
Dave31's Avatar
Dave31 Dave31 is offline
Super Moderator
Join Date: Mar 2008
Location: Old Pueblo,Arizona
Posts: 11,118
Default Re: NGK Spark Plug

For NGK spark plugs there is a simple rule of thumb:
Low heat rating number (for inst. BP4ES) "Hot spark plug".
high heat intake due to long insulator tip.
High heat rating number (for inst. BP8ES) "Cold spark plug".
Low heat intake, due to short insulator tip.
Reply With Quote