chrgdrt Well-Known Member Joined Nov 1, 2009 Messages 488 Reaction score 292 Location Richmond, Mi Sep 17, 2018 #51 70aarcuda said: i never had a problem getting vacuum secondaries to open.....I have found by using them at the race track that the VS carbs are about a good tenth slower then a same size double pumper... I must be a 1%.......... Quick Fuel Carburetor Secondary Covers 63-12QFT Quick Fuel Adjustable Vacuum Secondary Kits 63-1QFT I used the more expensive billet one since I am a 1%........... Click to expand... Pretty much the same results here, 750VS to an 800DP about a tenth on a mid 11 sec car.
70aarcuda said: i never had a problem getting vacuum secondaries to open.....I have found by using them at the race track that the VS carbs are about a good tenth slower then a same size double pumper... I must be a 1%.......... Quick Fuel Carburetor Secondary Covers 63-12QFT Quick Fuel Adjustable Vacuum Secondary Kits 63-1QFT I used the more expensive billet one since I am a 1%........... Click to expand... Pretty much the same results here, 750VS to an 800DP about a tenth on a mid 11 sec car.
