Originally posted by erlrich:
Corey -
Just wondering - did the car run ok when it was cold? How hot was it that day? These cars have a well-earned reputation for being hot-heads. I know I spent half of my first track day (mid-July, mid-90's) running around with the heater blasting. Since I installed a Koyo radiator I've had no problems with heat, and that is with NGK ZFR5E plugs and 94 octane gas (w/stock internals). I have to agree with Jim & Tristan it sounds like something more than just wrong plugs, either ignition or maybe even cam timing.
One other thought, did you check the head for straightness before you put it back on? It wouldn't take much of a leak in the head gasket area to cause the problems you're describing.
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