Re: Spark Plugs

Posted by PackardV8 On 2012/5/19 17:53:36

Quote:
" Heat ranges - Why are they important to me?"

Owen gives a good explanation.

I mite add:
A plug that is too hot (way too hot) can cause engine damage such a burned hole in piston or edge of valve. HOWEVER, such a plug that is too hot would cause rather obvious and conspicuous symptoms such as a rather loud spark knock. Obvious and conspicuous to the exteant that a reasonable and sober minded individual would take action not to over load the engine and to replace with a colder plug at some very near future convenient time before running the engine too hard.

The hotter the plug the better the gas mileage. But of course there are limits as indicated above. The hotter the plug the SHORTER the plug life.

The COLDER the plug the HOTTERR the engine has to run. Too cold of a plug not likely to cause engine damage because the engine will run like shit so bad that u won't want to drive it and maybe not even get it start in cooler weather.