fits model: Xp.

( Brand: Holley ), ( Manufacturer Part Number: 0-80845HBX ), ( Part Type: Carburetor ), ( UPC: 090127713563 )
The Holley 0-80845HBX Ultra HP Carburetor is a high-performance, fuel-injected carburetor that delivers superior engine response and precision fuel delivery for racing applications. This carburetor is part of Holley's Ultra series, which is known for its advanced features, ease of use, and durability.
The Ultra XP carburetor utilizes Holley's proven HP series internals, with a sleeved 850 CFM borosilicon nitride bowl for excellent flow and durability. This carburetor also features a high-flow chromed baffled base plate and a heavy-duty diaphragm to ensure proper fuel level and consistent delivery.
One of the standout features of the Ultra XP carburetor is its integrated Electronic Fuel Injection (EFI) system, which can be optimized through Holley's EFI management software. This system allows for fuel pressure, base circle size, and other critical factors to be dialed in for optimal engine performance. The carburetor also includes a built-in air ubble to eliminate the need for an external vacuum pump.
The Ultra XP also includes Holley's exclusive High-Ram intake manifold design, which allows for the intake manifold to be placed higher on the engine for improved ram air effect. This design helps to increase engine efficiency and power output by allowing the engine to draw in denser, cooler air.
Another key feature of the Ultra XP carburetor is its adjustable idle mixture control, which allows for quick and easy adjustments to the idle mixture ratio. Additionally, the carburetor includes dual feed fuel bowls to ensure that each cylinder receives an even fuel mixture for optimal engine performance.
The Ultra XP carburetor also includes a variety of other performance-enhancing features, such as a 5-blade adjustable primary and 3-blade adjustable secondary venturi for improved fuel atomization and air/fuel mixture, as well as adjustable emission controls for LEGUARD and LS1 applications.
Overall, the Holley 0-80845HBX Ultra HP Carburetor is a high-performance, fuel-injected carburetor that delivers superior engine response, precision fuel delivery, and advanced features for racing applications. With its integrated EFI system, High-Ram intake manifold design, and adjustable idle mixture control, this carburetor is a must-have for serious racers looking to optimize their engine performance.
The Holley 0-80845HBX Ultra HP Carburetor is a popular choice among performance enthusiasts looking for a high-performance carburetor. Here are some pros and cons to help you make an informed decision regarding this product:
Pros:1. High Flow Design: The Ultra HP carburetor is engineered for high performance applications, capable of delivering large amounts of fuel for increased horsepower and torque.
2. Multiple Fuel Systems: Holley offers this carburetor in various configurations, including mechanical secondaries and electric choke options to cater to specific engine setups.
3. Easy-to-Tune: The Ultra HP carburetor comes with a progressive linkage system, making it easier to tune for optimal performance.
4. Customizable: It offers a wide range of customization options to adapt to various engine setups, fuels, and driving conditions.
5. Rugged Construction: Built with billet aluminum bodies and chromemolly metal nitride-hardcoated shafts, this carburetor can handle high horsepower engine applications with ease.
Cons:1. Complex Installation: The installation process can be time-consuming and may require professional assistance, especially for more complex engine setups with multiple fuel systems or electric choke configurations.
2. Expensive: Compared to stock or lower-performance carburetors, the Ultra HP is an expensive investment, with prices that significantly exceed the cost of standard options.
3. Responsiveness: Depending on the engine setup, some users have reported issues with the carburetor's responsiveness, particularly under heavy acceleration or at high RPMs.
4. Compatibility: This carburetor may not be compatible with all vehicles and engines, although Holley offers various configurations to help mitigate this concern.
Ending Conclusion:The Holley 0-80845HBX Ultra HP Carburetor is a top-performing option for high-horsepower engine applications, offering several benefits such as its high flow design, customizability, and easy tuning. However, it comes with a few notable drawbacks like complex installation, potential responsiveness issues, and its high cost. If you're looking for peak engine performance and are willing to invest time and money, the Ultra HP is a solid choice; otherwise, you may want to consider alternative, less expensive options.
Provides choice of 1:1 or progressive secondary throttle actuation for ultimate control secondary opening rate; Base plate designed with a boss that can be consumer machined vacuum source; Stainless steel plates; Includes notched float and jet extensions; 100% wet-flow tested by Holley technicians to assure it arrives ready run!;. 0-80845HBX Holley Ultra XP Carburetor: 950 cfm - 4150 Mechanical Secondaries Hard Core Gray E85;Aluminum Construction saves 4.5 lbs 38% weight savings ; with black anodized billet aluminum metering block and booster inserts; designed for use on Drag race, circle track, or any high horsepower engines; E85 specific calibration; Contoured venture inlet offers balanced airflow increased horsepower; Air bleeds moved outward to allow a smoother transition of from the top carburetor into venture; Metering blocks feature improved durability, true gasket sealing fully adjustable emulsion bleeds, power valve channel restricts idle feed restricts ; Integrated bypass eliminates need holes in throttle plates allows proper adjustment while maintaining correct plate transfer slot relationship.; Helps maintain good control when using radical camshafts.; Fuel bowls provide 20% more fuel capacity controlling slosh internal baffling; Clear sight windows both sides easy safe level adjustments; Built drain plug front bowl provides access empty contents bowl; 8AN o-ringed threads offer large variety plumbing options can be plumbed either side; .130 stainless needle seats demand E-85; 4 corner you precisely your system; perfect off line launches; Elongated dual pattern mounting fitment intakes square flange Holley Dominate ; Knurled hand adjustable primary secondary curb screws without tools; Primary shaft capped prevent entry debris contaminates; Throttle is slabbed undercut airflow; Factory machined accessory hole addition stop. Buyer pays return shipping. A signature is required on all UPS orders over $750.