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Old 10-25-2007, 11:27 AM
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Wayne Maybury Wayne Maybury is offline
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Join Date: Mar 1999
Location: Quebec, Canada, QC
Cobra Make, Engine: Johnex 427 S/C, 351W, 472 HP, 444 lbs. torque
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I have to also do this (make a dropped bottom oval filter). I presently have one of those small chrome S & H filters on mine and while it was not dynoed, my friend did put it on the flow bench. I can't remember the exact results (they are posted somewhere here on CC) but the filter reduced the flow of my 750 Holley by 30 to 40%.

Wayne
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