[Tom Vaught]

Ok, Time I guess to explain Picture #1 and #2 in Post # 159.

The pictures show a typical 3 Circuit Metering Block with the left Main Well wall machined away. By doing this now anyone can see that there is a new part installed in the normal empty Main Well. The part installed is the Emulsion Tube and Idle Feed Restriction for the Idle Circuit of the 3 Circuit Dominator Carb.

So if you have a street car and want the Dominator look, Holley came up with a way to package the Idle Circuit, Intermediate Circuit, and the Main Circuit in the normal 2 Circuit Metering Block carb.

But you can also see that the Idle Circuit now takes up a bunch of space in the normally empty Main Well. So on the street and some spirited racing on the track the carb functions fine.

But put the carb into a true race mode with large jetting requirements, "We have a problem NASA"
(The Idle Tube acts as a restriction in the Main Well and blocks additional fuel from going to the engine once you get past about a #9 Holley Jet.
You can take the Jet completely out of the well and it will not make any difference as the Idle Tube is downstream of the Main Jet and is the controlling restriction in the circuit.

So what do Holley Dominator Carb Builders like Shaker455, Tuner, MarkAudio, and myself do?
We convert the carbs back to Two Circuit carbs.
No restriction in the Main Wells, plenty of fuel even on an alcohol carb, and the carb is designed for Racing, not street manners.

So every Guy who bought the 3 Circuit Carb vs the "plain" Two Circuit" carb just put a carb "Throttle Stop" on his racing package if he bought a Holley Dominator 3 circuit carb.

Now IF the carb was a Custom Built deal from Beaswell, etc with custom Everything then maybe you still can make a 3 circuit carb work. Just don't expect the normal Jegs or Summit deal to work for you. Holley just tried to make the street guy happy with a Dominator.

Tom V.