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Originally Posted by SVT32VDOHC  The problem is that this motor has tight tolerances. When you keep on the gas that long the blower starts to generate so much heat that the pistons melt. Usually 7 and 8. The head cooling mod does not prevent this from happening, but it is a precaution that people think will help because it cools thoe two cylinders off. It's just not cooling it enough to where that WOT pull won't affect it.
Long story short, don't do it. Too much heat builds up. 2nd-6th gear pull at WOT is insane. Don't blow your motor or kill yourself/others. |
Tight tolerences? Not true at all. I dont know where people get the idea that these motors have any different clearences than any other motors. The entire issue is the thickness of the top land on the pistons. They are the weak link in the motor. I run WOT for 30 mins straight. I run 4k to 7k for 20 to 40 min races in 100+ heat. Anyone who pushes the stock motor hard will break a piston. Just swap out to some Manley 18cc dish and get them top coated. No more issues.