As a premium unit, the Ultra carbs carry other premium features that can be appreciated by those who are serious about performance. An inspection down the throttle bores shows Teflon-coated throttle shafts that are slabbed at the throttle plates and use low-profile fasteners to reduce restriction. Unlike older versions of the Dominator that carried the secondary actuation linkage buried under the main body, the Ultra moves the secondary linkage to an external location, and allows for a quick adjustment of the secondary leverage ratio to alter the secondary opening progression. The air horn features a polished and blended venturi entrance, designed to further improve flow and reduce turbulence. A little further down the bores we find precision billet 12-hole annular boosters for improved signal strength and atomization.
Is an Ultra the right carb for you? If the engine airflow requirements demand the capacity of a Dominator, while reduced weight is a consideration, and if the ultimate in tunability is a virtue that you can't do without, the Ultra is a very enticing package. We found it difficult to resist the draw of this carb's many design features and improved construction when contemplating a carb for the stout 700-plus horsepower big-block Chevy 509 we currently have in the works. We'll be on the dyno with that soon with a full report on the build and the subsequent dyno tuning and testing session next month. With an Ultra Dominator on board, you can bet that we'll have it tuned to a razor's edge.
| ULTRA DOMINATOR APPLICATIONS |
| Part No.: | CFM: | Venturi: | Bore: | Application: | Circuit: |
| 0-80186-2* | 750 | 1.690 | 2.000 | 1x4 | 2 |
| 0-8082-2* | 1,050 | 1.690 | 2.000 | 1x4 | 2 |
| 0-8896-2* | 1,050 | 1.690 | 2.000 | 1x4 | 3 |
| 0-9375-2* | 1,050 | 1.690 | 2.000 | 2x4 | 3 |
| 0-7320-2* | 1,150 | 1.830 | 2.000 | 1x4 | 2 |
| 0-80556-2* | 1,150 | 1.830 | 2.000 | 1x4 | 3 |
| 0-9377-2* | 1,150 | 1.830 | 2.000 | 2x4 | 3 |
| 0-80532-2* | 1,250 | 1.880 | 2.125 | 1x4 | 3 |
| * Add suffix RD for Red Anodized Detail, suffix BK for Black Anodized Detail |
Traditionally, Dominator carbs...
Traditionally, Dominator carbs have had the secondary actuation linkage stuffed in the center of the barrels under the main body. Changes to the linkage action required removing the carb and replacing linkage parts.
The Ultra Dominators feature...
The Ultra Dominators feature an external secondary linkage that is fully adjustable, with multiple secondary link holes for easy linkage ratio changes to alter the secondary staging delay.
You'll find familiar center-hung...
You'll find familiar center-hung float bowls on the Ultra, but not the zinc castings you may be used to. The Ultra bowls are die-cast aluminum, with large sight windows to easily view the fuel level while making float adjustments.
As with the rest of the carb,...
As with the rest of the carb, the Ultra metering blocks (bottom) are made of aluminum rather than cast zinc, and are carved from solid billet. The metering system and gaskets remain the same, as do the jets.
When it comes to hard-core...
When it comes to hard-core tuning and calibration, there is little arguing the fact that removing and replacing screw-in restrictions offers infinitely more flexibility than dealing with fixed orifice drillings. The Ultra's emulsion, enrichment, and idle feed orifices are all replaceable.
With all of the major components...
With all of the major components constructed of lightweight aluminum rather than a combination of zinc and aluminum, the Ultra Dominator offers a substantial weight savings compared the standard carb. We measured a 3.8-pound difference between these two, and that is doubled for a dual-quad installation.