Holley carburetor identification list numbers
Also look for a designator like -A, or -AAS. This further defines the carburetor number. Most kits will be found ok with just the LIST number. You will find carburetor numbers listed as RA, or something similar.
Holley 2300 Identification
In this case the LIST is Once the LIST number is found enter it in our search box. The correct kit will be displayed. Can't find what you need? Contact Us.
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Rochester 2 Barrel Carburetor Brass Float. All primary sides include an accelerator pump, which is activated by the throttle linkage. The pump serves to inject an added boost of fuel to eliminate bog or lag when the throttles are opened, which is especially critical at lower engine speeds. With a vacuum secondary design, the secondaries begin to open according to vacuum developed in one of the primary bore venturis, as engine load increases.
During quick accelerator operation under load, a slight delay may be encountered while the secondaries begin to open. You can tune the vacuum secondary by changing to a lighter or heavier spring inside the vacuum diaphragm housing. Double Pumper carburetors are equipped with mechanical secondaries; a second, separate accelerator pump circuit is located on the secondary side. The Ultra series is available with various color-coded blocks and baseplate in blue, red, and Hard Core Black. The Ultra Series carbs are offered in either mechanical- or electric-choke versions.
The Ultra HP series eliminates the choke provision. Double Pumper carbs are best suited to lighter-weight vehicles, those equipped with a manual transmission, and those with high— stall-speed automatic transmissions in the 3,rpm range. Introduced In , the HP-series Street Avenger includes cast aluminum bodies with billet metering blocks and baseplates that reduce overall weight by an astounding 5 pounds compared to previous carbs.
This line of carbs is also offered in both diecast and aluminum body construction. The lineup is quite extensive. In , Holley released a new aluminum Ultra HP series carb with 30 new and improved features, including larger 1.
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Although the majority of Avenger carbs have electric choke, six versions within the entire lineup are offered with manual choke. All Avengers have vacuum secondaries.
How to Identify Your Holley or Demon Carburetor - Holley Blog
Street Avenger carbs were designed and calibrated specifically for optimal street performance, with features including a secondary metering block, four vacuum ports for positive crankcase ventilation, power brake, spark, and vacuum accessories. The Avenger series is not designed for immediate bolt-on use with Chrysler automatic overdrive transmissions. Depending on your throttle bracket, you also need a throttle stud PN , , or The Street Avenger includes a Ford automatic transmission kickdown, but not for use with overdrive transmissions.
The Ultra Street Avenger series has aluminum construction and anodized billet aluminum metering blocks and baseplate available in various colors. The Ultra is lighter for those concerned with minimizing weight and comes in several anodized colors. Personally, I love the Ultra series; in addition to the benefit of reduced weight, they look way cool.
In addition to reduced weight and the obvious visual appeal, the anodizing protects the aluminum from long-term corrosion. The Ultra Series carbs has convenient glass fuel bowl sights, making it much easier to check fuel bowl level during adjustments without the need to remove a solid brass plug.
In recent years, black has become the go-to color for those who wish to break out of the chrome-and-color mold and create a pro, understated, somewhat monochromatic appearance. All Ultra and Ultra HP carbs have double-pumper operation with an accelerator pump for each fuel bowl. The Ultra HP series Double Pumper carbs have no choke and are designed for racing applications for which a choke is not required. This is a tumble-polished aluminum body and billet aluminum metering blocks and baseplate anodized in red PN RD. The Street HP carbs have a smooth, contoured venturi area for superior airflow.
The boosters, the dichromate finished components directly over each venturi, are the down-leg style with a single fuel hole inside each barrel opening. The Street HP series is offered in yellow chromate, black, or tumble-polished finish. Sizes range from to cfm. This Ultra HP carb is mounted to an intake manifold that has been smoothed and hydro-dipped for a carbon-fiber appearance.
Note the absence of a secondary accelerator pump on the rear bowl on this Street Avenger. Street Avenger carbs are specially designed and calibrated for optimum street performance; they are available in sizes ranging from to cfm.
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All have vacuum secondary operation and are available with either manual or electric chokes. The aluminum construction reduces weight. Avenger carbs have an accelerator pump only at the primary bowl location. Note the dual fuel-feed fittings on the primary and secondary bowls.
What To Look For When Buying A Used Holley Carburetor
Avengers are series carbs, so the secondary side has metering blocks with serviceable jets. A quick-change vacuum housing cover allows changing the vacuum spring without the need to disassemble the entire housing unit. The cover is secured with two screws. Simply remove the two screws and then remove the cover and spring. Some carbs, such as the Avenger, have this as standard equipment. The quick-change feature can be retrofitted to other carbs with a secondary vacuum kit. The housing cover and spring simply pull out.
An O-ring seats onto the top of the housing.
If it pops loose, be sure to reinstall it into its groove. The vacuum diaphragm spring sticks onto the housing top and is easily changed to a lighter or heavier spring to tune the secondary opening rate. This prevents excess fuel spillover from sloshing out of the vent tubes. This is a cfm Truck Avenger PN Photo Courtesy Holley Performance Products. The Avenger Truck series is a unique design, intended specifically for truck and off-road applications.
It has a single fuel inlet, square fuel bowls with side-hung floats, and an exclusive metering block and vent tube designed to prevent fuel spillover at extreme angles. Flood-free operation accommodates climbing angles up to 40 degrees as well as side-hill maneuvers and nose-down descents up to 30 degrees.
The Dominator was designed as a large-airflow racing carburetor and debuted in although some sources say , initially to address the needs of NASCAR competition. Shortly thereafter, it was offered to the public. Today, the is extremely popular in drag racing applications. The Dominator flange is unique to the series. You must use a manifold designed for use with a Dominator or install an adapter mounting plate to accept a Dominator. A Dominator cannot bolt to an intake manifold that is not designed for its larger bolt pattern.
The Dominator series ranges from cfm all the way to 1, cfm. Float bowls and metering blocks are similar to those found in the series, but the features an appreciably larger main body with the unique secondary linkage located between the front and rear throttle bores, underneath the main body.
Throttle bores have a hefty 2. The Dominator series was developed specifically for top-end horsepower and torque. The classic Dominator has an aluminum main body with contoured venturi inlets for balanced airflow, a high-flow metering system, and annular boosters. The fuel bowls allow inlet plumbing on either side. The classic Dominator is offered in two- or three-circuit configurations and choices of 1 x 4 or 2 x 4 setups.
It also includes 20 percent larger fuel bowls to eliminate starvation, hole billet booster inserts, adjustable external linkage, and provisions for mounting a throttle position sensor. Annular boosters on the Dominator have a series of fuel orifices spaced around the inside diameter of each booster for superior fuel atomization.
Boosters help to pull fuel from the bowls as air passes through them.