spark plug question
Ok I have a 93 fastback with a 97blacktop sr with the usual bolt-ons. full 3" exhaust (extension/dp/catback) intake, ic, coil-pack set up, etc. no boost controller. I'm currently using NGK 3330 (BCPR7ES) sparkplugs at a 33 gap, pretty much someone swore by them and ive been using them but lately im not so sure if theyre the right thing to be using. so im wondering if anyone has any other suggestions. what model sparkplug and what gapping to use. any feedback would be greatly appreciated.
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