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I've ran into the same exact problem a few different times and has always been cured the same way. A 160 degree thermostat, and the installation of an aluminum radiator!! Nothing else has ever worked for me. When an engine builds a bunch of power, the cooling system is the first to show it.




Exactly but there will be posts contradicting this. On my 500 HP Challenger I have a 26" Griffin aluminum radiator, a 160 degree high flow t/stat, a high flow water pump, a 7 blade aluminum fan, a h/d fan clutch and a stock shroud. I also use Evans NPG+ coolant. I can drive this car through death valley and it won't see 200 degrees on the gauge. -Bob