Quote:
Originally Posted by edgehead2000
Not following you on why using a belly pan without extractor is bad. Neither my old NA Chrysler Crossfire or their AMG tuned SRT6 had an extractor; regardless, it still performed beautifully.
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Again, it depends on the car & and the pan but a belly pan is to reduce turbulence of the air moving under the car and dumping all the air from the radiator/engine bay pretty well defeats that not to mention that it won't help overcome lift that way. Also if the pan is extensive enough there isn't enough space for that volume of air to exit effectively stalling the air flow. Probably wouldn't happen with the ZL1 pan but why mess with all the wind tunnel & CFD testing that's already been done by Chevy & others.
So the Crossfire fender vents (AKA extractors) were fake? That's well, disappointing but not surpising. Look at a real AMG or an SLR or an SLS. Hood & fender extractors are functional and the belly is smooth. Even as old as the 300SL MB was keepig radiator air out from under the body. Even more dramatic are some of the super cars. I'm not saying you have to go that far. Those kind of things only start to make a real difference about the time you start breaking the speed limit or for road racing. Look at the amount of vents to this engine bay
http://www.sareni-united.com/en/. Drag racers on the other hand would probably be better served closing off the grills entirely if they're able to cool things quickly after 1/4mi squirt.
Never drove a Crossfire but I did see the Brit. Top Gear test and they hated it but they do get to beat on all the really cool stuff so they're a little jaded I think. BTW they thought the Camaro SS was a real kick.
