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Old 12-29-2017, 09:08 AM
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Tom Vaught Tom Vaught is offline
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Join Date: Dec 2001
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Food for thought:

If you have a Dominator Carb that has the ability to get 12.6-12.8 Air Fuel ratio on a 2 circuit Dominator Carb, then why is a third circuit needed?

Basic Reason, To extend the t-slot circuit artificially.

A idle/t-slot is a very small orifice with a small Idle Air Bleed. The Main Air Bleed is small so it will not start the Main Booster flow early, but this can be done by using a 3 circuit carb.

The 3rd circuit is filling the fuel delivery space between the Idle Circuit and the Main Booster Circuit. From a Holley design point there might be some benefits to that extra complexity, (and some $$$), but from a reality stand point is it really necessary to have that third circuit Holley Dominator when a 2 circuit Dominator can do the same thing and it will be cheaper and easier to calibrate because it does not have that Emulsion tube inside the metering block (for the 3rd circuit).

Tom V.

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