Spark plugs

jcw31 · 11-27-2014, 01:18 PM

Billy how much do you attribute the difference to them possibly being a different heat range than an iridium plug? A friend had a zz502 crate when we changed from rapidfire [a multiple heat range]
to ngk copper the car also slowed down. The interchanges between different companys dont always match correctly.Also the rapidfires while I agree is a very good plug also has a v tipped ground strap which helps.

Joe

11-27-2014, 01:18 PM	#34
jcw31 Junior Member Join Date: Jan 2013 Posts: 94 Likes: 0 Liked 6 Times in 6 Posts	Re: Spark plugs Billy how much do you attribute the difference to them possibly being a different heat range than an iridium plug? A friend had a zz502 crate when we changed from rapidfire [a multiple heat range] to ngk copper the car also slowed down. The interchanges between different companys dont always match correctly.Also the rapidfires while I agree is a very good plug also has a v tipped ground strap which helps. Joe