When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Reading spark plugs is something more practiced buy the H/P engine guys but nice to know. I just had my plugs out last week to take a look. I am running a P1SC with Kook L/T Headers. Nice to know what's going on in there.
Last edited by frank dupuy; Oct 11, 2005 at 12:52 PM.
Really with todays fuels there is little to be learned by reading plugs unless you add lead to the fuel.
Then you need to shut off the ing. at the end of the wot run and pull the plug to get an accurate reading.
Today you need a good wide band with data logging.