I tried something interesting. I tied of the vacuum secondaries on my 390 Holley and went out for a spin. WOT spins and I can’t tell much difference having all 4 or just running on 2.
Would a double pumper with mechanical secondaries be better? It would get all 4 open quicker. Or maybe just a 500 CFM 2 barrel would be better. I realize that 235 CI doesn’t require much I the way of carb (CFM), but if it was bigger than needed wouldn’t the engine just pull what it could use?
Any thoughts?
Humm…
Luis
