redbud@ihuxq.UUCP (Al Kelkhoff) (10/03/84)
I would like to know if anyone has information regarding spark plug heat ranges. I read recently that to increase the performance of my 2.2 engine I should replace the current N12Y plugs with N9Y or N7Y plugs. As the numbers go down does the heat rating go up? thanks al kelkhoff ihuxq!redbud