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cooling
My immediate thought is that you're under-cooling.I don't believe the fan should ever come on above 40-mph.The ram air should take care of everything.If you do the bellypan later,that could conceivably lower your drag another 12% and she should run even cooler.Make sure that your ductwork between the reduced opening and radiator is air-tight otherwise the stagnation pressure will bleed away,compromising the cooling.If you have to,open some of the block.Driving is stressful enough without having to worry about over-heating.-------- Later on,when you've done other mods,you can close it back as your load will be reduced.-------- As to the GM chin spoiler,any of the "bottom-breathers" will have that to look at.Corvette,Trans Am Firebird,and some Camaros from mid-1990s on.
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