Description
Holley 0-80903HBM Details
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 tested to deliver proven performance!
Features:
- 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 and 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
- Factory ready TPS mounting points for use with data acquisition systems (Holley TPS P/N 534-214 available)
- Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools
- Contoured hex head squirter screws for streamlined airflow
- Fully adjustable stainless steel external linkage can be adjusted for 1:1 progressive, or soft progressive throttle activation. No linkage parts under the carburetor
- 100% wet-flow tested by Holley technicians to assure it arrives ready to run!
- J-Style vent tubes
CARB Warning
For race/ off road use only
| KEY SPECS | |
|---|---|
| MFG. Part # | 0-80903HBM |
| Brand | Holley |
| Carburetor Barrels | 4-Barrel |
| Fuel Type | Gasoline |
| Choke Type | No Choke |
| CFM Range | 1,000-1,099 CFM |
| CFM | 1050 CFM |
| Carburetor Flange Type | 4-Barrel Dominator |
| Finish | Hard Core Gray |
| Material Type | Aluminum |
| Secondary Type | Mechanical |
| Fuel Inlet Type | Dual |
| New or Remanufactured | New |
| Throttle Linkage Type | Universal |
| Supercharged Application | No |
| GENERAL | |
| Model | 4500UHP |
| Booster | Annular Billet Insert |
| Number of Circuits | 3 |
| Emission Code | 4 |
| Throttle Bore | 2.000 inch |
| Venturi Diameter | 1.690 Inch |
| Bolt Hole Pattern | 5.375″ x 5.375″ |
| Primary Main Jet | 84 |
| Primary Power Valve | 6.5 |
| Primary Pump Nozzle Size | 35 |
| Secondary Main Jet | 84 |
| Primary Outer Air Bleed Sizes Included | 65 |
| Primary Inner Air Bleed Sizes Included | 43 |
| Secondary Outer Air Bleed Sizes Included | 65 |
| Secondary Inner Air Bleed Sizes Included | 43 |
| Primary Discharge Nozzle Size | 0.035 Inch |
| Secondary Discharge Nozzle Size | 0.035 Inch |
| GTIN Code | 090127021194 |
| Sold in Quantity | Each |
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