So they might actually be worth a shot if you're running an MSD, or some hotter ignition. I've heard a couple of 5.0 owners swear by the platinums, one of them being the guy at the local speed shop - who probably has a hotter than stock ignition. Now it makes sense.systronic said:ive actually read that because those fancy plugs are made of platinum is the reason some older cars dont like them.
the older ignition systems simply dont have enough juice to get a good spark off of platinum.
the article recommended thart all cars made before 1993 avoid the platinum plugs
Thank you, I just put one on my car, and was beginning to wonder... It might be a different story with the MSD box?shakerhood said:I have an MSD Coil on my Stang, but it still only likes the basics! Even if those Expensive plugs helped you a bit, it would be so slim that it would never offset the cost difference.
If you're running a stock ignition, go with the standard copper plugs. Motorcraft, Autolite, Champion, or whoever, and like I said before, I don't know of anything bad to say about the Splitfire SF2Es - other than the price.jbspeed86 said:how do u know what plugs to get anyway, no matter what kinda mods u have? i am putting on heads, cam, upper/lower intake, maf, tb, egr plate, headers, 24lb injectors and a few other things how do i determine what plugs to get and what to gap them at?