67Dart273
Well-Known Member
6 packs are rated at a 2bbl. Each for that total. If rated as a 4bbl. they would equal 780CFM.
Not only that, the original AFB / AVS were not rated the same as Holley 4bbls. If I remember right, the Carters were rated "wet" flow, the Holleys "dry" so the Carters actually flowed more as compared to Holley
So far as Holley 2bbl/ 4bbl, very good point. The 4bbls are rated at 1.5" (water) vacuum and the 2bbls rated at 3". A 500cfm Holley 2bbl for example, works out to about 350 CFM when rated as a 4 bbl