livingwater
New member
Anyone have any idea how carb companies calculate flow rates?
I took the two throttle bodies that Holley markets to GM TBI users, and calculated backwards from their rated number (CFM) to air velocity based on the area the air has to go through. It seemed like a reasonable idea, until I came up with velocity numbers which were about 30,000 ft/min apart.
My purpose for this investigation is to ensure that I am doing correct calculations for a cold air intake on my wife's Suburban. Sure, I could just throw some 4 or 6 inch tube in there, but I'd rather take the time to optimise it.
Thanks.
I took the two throttle bodies that Holley markets to GM TBI users, and calculated backwards from their rated number (CFM) to air velocity based on the area the air has to go through. It seemed like a reasonable idea, until I came up with velocity numbers which were about 30,000 ft/min apart.
My purpose for this investigation is to ensure that I am doing correct calculations for a cold air intake on my wife's Suburban. Sure, I could just throw some 4 or 6 inch tube in there, but I'd rather take the time to optimise it.
Thanks.