Air flow over an object will exchang heat more quickly the faster it moves, know as wind chill factor, but the temp of the air does not change, or its density. I'm also sure the air is cold at 10000 feet, at any speed.
BUT, The point is, non under hood air is better than under hood air. The chevy cowl hood, is a good example this, not a pressure thing, just cool uside air.
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93LXcopcarSOLD14.3@96 @ 4500ft 2.02 60ft on street tires.
my 67 ranchero NOT A 390 ANY MORE! 460! 3.70's cast manifolds, comp cams 262H, performer, 750DP 100K out of 79 F250
NEW(oct20/02)14.58@95mph 2.3 60 ft
corrects to:13.86@100
66 merc comet351w, isky roller 600 lift 268/260@.050, vic jr. 700DP, 5000stall, 4.56's c-4, 3400lbs with driver
12.3@110 @ 4000ft 1.69 60 ft
corrects to:11.69@115
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