Anybody Actually Goin' Fast With a Holley 3 BBL?

[wheelhop]

Is there a Rosetta-Stone CD I can pick up to help me understand this carb lingo ????

[markjohnson]

I'll tell 'ya.......I agree that Vacuum Secondaries Carbs can be made to run hard, especially advantageous on a traction limited car. Up until a just a few years, Holley even had a 950 HP Model that was available with Vacuum Secondaries. We had one on a buddy's 454 Nova that ran 10.50-60's like clockwork on a 28-10.5 Mickey. It was a great carb and sometimes I wish I had socked that one away for a future application. Unfortunately, they were discontinued because everyone wanted the double pumper version.

[StealthBird]

My 3bbl still has the factory monster choke flap in place. the weird one with the two giant holes that, when the flap is closed, keep the boosters exposed. I went one step further and made a fast idle circuit with a solenoid. When you start the car up and pull the choke closed, it sets the fast idle to 1500 rpm. When you open the choke, the solenoid kicks off and the idle is back to normal.

[MultiMopars]

I agree, a vacuum secondary carb CAN run well performance wise and is far more street friendly than a 2x pumper.

[Plowman]

Bkhpah Dyno sheet on a 427 cu.in. the old 3 barrel on the 1968 Dana,peak at HP at 6400rpm was 642.1 at 4800rpm made 589 ft lbs of torque,THE OLD 3 BARREL!