PurpleCherokee said:Spark plugs are about 99% hype. Example: Bosch Platinum +4's... pure crap. I got suckered into spendin 8 bucks a plug only to have it seperate a couple months later. A spark is NEVER gunna be divided up across four ground electrodes. Each ground electrode would have to have the EXACT same resistance and be the EXACT same distance from the electrode, which is impossible to achieve. So unless you're workin some MAJOR voltage, you'll never get the spark to jump into all four ground electrodes. All those extra electrodes do is block the a/f mix from getting to the electrode thus resulting in a less complete burn if anything. What I'm saying is that I don't think they're any better than a $1 plug. I happen to like Autolites... they're cheap and reliable. I run Autolite platinums and have never had a problem with them at all. Iridiums I guess if you wanna spend the money would be ok too but I suspect you'd never tell a difference in a DD.
If one electrod fouls then the plug is dead. The foul creats the least resistance to ground and it won't spark. If you use Chamions watch out for the ones made in Mexico. They have a nasty habit of snapping off in the head when you take them out.Mike1331 said:My plugs are getting fouled from running rich and I like the idea of running one with a few tips so the spark can find an un-fouled tip. Although it seems to run ok with the champions. .
wolfpackjeeper said:those E3 plugs are crap, we sell them for lawnmowers and I wouldnt even put one in that. It is a "gimmick" plug. It is kinda like buying the magnet to go on your fuel rail to line up the molecules for a better burn. And yes, if you are fouling out plugs you could go up a heat range or 2, but I would check out the fuel regulator first. The vacuum line tends to come loose and expand over time, causes it to run rich(at least mine)
NGK 2262's are 2 heat ranges hotter,btw
alex22 said:The 4 electrodes are there to make the plug last 4 times as long. Ever notice how a high mileage engine's plug gap will be massive? My Ferd plugs with over 100K on them had a gap of .105 (were supposed to be .040). When the spark wears down the first electrode the air gap will add resistance to that ground strap so the spark will jump to the next clocest ground. The extra grounds "in the way" probly have a very minimal effect on the flame speed.
~Alex
wolfpackjeeper said:I think you want zfr5f11 ngk's, but I am not sure of that PN, I will check tomorrow if no one beats me to it