FWIW...Patrick James at Pro Systems told me if the car does NOT run faster w/ the air cleaner removed, then the mixture is off. It SHOULD be faster w/ no air cleaner.
Unless you're having some sort of air turbulence issue at speed which is very possible. An air cleaner can help w/ that.
I don't run one at the track b/c I can only fit a small diameter air cleaner w/ a short filter on mine...just use it on the street. It's like 9"x2" or something like that.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 4 speed, Dana 60 '71 Demon 340, no drivetrain, on blocks behind the barn '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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