Originally posted by wattspxr:
Originally posted by PA 3L SVT:
Changing spark plugs in a properly tuned engine will net 0 hp +/- 1, unless the old plugs were damaged or severely worn. In that case, you just get back whatever power the old plugs were robbing.
I don't get where you folks are coming to such conclusions. Whether based on Hypothisis, here say or even supposed engineering background, such claims are not accurate or true.
I won't even get into detail of why this is the case but you guy's need to stop making inaccurate claims. People here will believe anything they see, unfortunate the case!!!
Show me a case of where two different plugs, both basically the same (heat range, gap, etc.) and from a quality manufacturer, have a significant performance difference. Data will make me a believer, otherwise I stick to my claim.
