Holley 1250 CFM Generation 3 Dominator Carburetor 1 x 4 Gas 3 Circuit Metering

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Product Description
Holley 1250 CFM Generation 3 Dominator Carburetor 1 x 4 Gas 3 Circuit Metering
The original Dominator? took carburetion to another level in 1969 when it was developed for NASCAR? racing. It has been refined over the years and has received its biggest change ever. The Gen 3 Ultra Dominator features a brand new main?body, brand new state?of?the?art calibrations, high volume fuel bowls and sizes up to 1475 CFM!
The patent pending GEN 3 main?body is 5/16" taller than the previous generation! This new height allowed for larger radius air entries which were optimized using Computational Fluid Dynamics (CFD) software to deliver smoother flow into new fully machined, big bore venturii.
The main-body also features an integrated idle bypass valve that allows for idle adjustments while maintaining the correct throttle plate to transfer slot relationship as well as an extended air cleaner flange for easy air scoop attachment when using the available air scoop adapter.
The Gen 3 utilizes high capacity fuel bowls which feature 20% more fuel capacity to eliminate starvation, integrated fuel shelf to minimize fuel aeration and internal baffling to control fuel slosh. Other features include all aluminum construction, 12 hole billet booster inserts, fully tunable billet metering blocks, adjustable external linkage, throttle position sensor mounting points and knurled (hand adjustable) curb idle screws
Each calibration has been dyno and track tested to deliver proven performance!
Features:
All aluminum construction saves 3.8lbs. over original models (28% weight savings)
Shiny with black anodized billet aluminum metering block and booster inserts
Designed for use on Drag race, Pro Street, or any high horsepower engines
Calibrations optimized for today's larger race engines and new fuels
Fully machined from venturii throat to throttle bore for predictable & repeatable performance
Integrated idle bypass valve allows for adjustment of idle while maintaining correct throttle plate to transfer slot relationship
12 hole billet booster inserts for superior atomization and crisp throttle response
Metering blocks feature improved durability, true gasket sealing and fully adjustable (emulsion bleeds, power valve channel restrictors & idle feed restrictors)
Dual 50cc accelerator pumps provide the perfect amount of fuel from idle to full throttle
Fuel bowls provide 20% more fuel capacity while controlling slosh with internal baffling
Clear sight windows on both sides of bowls for easy and safe fuel level adjustments
Built in drain plug in front center of bowl provides easy access to empty contents of bowl
-8 (o-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side
Specs:
Barrels: 4
Billet Color: Shiny with Black Billet
Booster: Annular Billet Insert
Brand: Holley
CFM: 1250
Choke: None
Circuit: 3
Emission Code: 4
Finish: Shiny
Fuel: Gasoline
Fuel Inlet: Dual
High Speed Air Bleed: 34
Idle Air Bleed Size: 51
Intermediate Air Bleed: 70
Material: Aluminum
Model: 4500
Needle and Seat Size: 120;120
Primary Main Jet: 92
Primary Power Valve: 5.5
Primary Pump Nozzle Size: 40
Product Type: Carburetor
Secondaries: Mechanical
Secondary Main Jet: 102
Secondary Pump Nozzle Size: 40
Supercharged Application: No
Throttle Bore: 2.125 inch
Venturii Size: 1.880 inch
Part Number: 0-80908BK
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