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, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '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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