Ultra XP Aluminum Carburetor

Name: Ultra XP Aluminum Carburetor
Brand: HOLLEY
SKU: 510-0-80835HBX
Price: 1217.95 USD
Availability: OutOfStock

Currently Unavailable

This product is no longer available. Please call customer service for assistance at 1-800-345-4545.

950 CFM

For Methanol Fuel Only
950 CFM
Hard Core Gray w/Black

Xtreme Performance - Holley Ultra XP Methanol carburetors! Ultra XP Methanol carbs are 38% lighter than our original HP, have fuel capacity that is 20% greater and 30 other new features! They're available in the Hard Core Gray hard coat anodized finish with Black billet for improved corrosion protection. Holley Ultra XP Methanol carburetors offer new features such as an integrated idle bypass valve that allows for idle adjustments while maintaining the correct throttle plate to transfer slot relationship, 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, fully tunable billet metering blocks, billet base plate, adjustable secondary linkage and knurled (hand adjustable) curb idle screws. Holley Ultra XP carburetors are the ultimate in square bore race carburetors!
Features:
Aluminum Construction (saves 4.5 lbs - 38% weight savings)
Hard Core Gray with black anodized billet aluminum metering block and booster inserts
Designed for use on Drag race, circle track, or any high horsepower engines
Methanol specific calibration
Contoured venturi inlet offers balanced airflow for increased horsepower
Air bleeds moved outward to allow a smoother transition of airflow from the top of the carburetor into the venturi
Metering blocks feature improved durability, true gasket sealing and fully adjustable (emulsion bleeds, power valve channel restrictors & idle feed restrictors)
Integrated idle bypass valve eliminates the need for holes in throttle plates and allows for proper adjustment of idle while maintaining correct throttle plate to transfer slot relationship. Helps maintain good idle control when using radical camshafts.
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
-08AN (O-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side
.150' stainless needle & seats to control the demand of E-85
4 corner idle allows you to precisely control your idle system
Mechanical Secondaries for perfect off the line launches
Elongated (dual pattern) mounting holes allow fitment on intakes with square flange (Holley 4150 style) or large flange (Holley Dominator style)
Knurled (hand adjustable) primary and secondary curb idle screws allow for easy idle adjustment without the use of tools
Primary throttle shaft capped to prevent entry of debris & contaminates
Throttle shaft is slabbed and undercut for improved airflow
Factory machined accessory mounting hole for easy addition of adjustable primary throttle stop. New secondary pump cam lever designed to provide positive throttle stop on secondary side
Stainless steel adjustable secondary link. Provides choice of 1:1 or progressive secondary throttle actuation for ultimate control of secondary opening rate
Baseplate designed with a boss that can be consumer machined for vacuum source
Stainless steel throttle plates
Includes notched float and jet extensions
100% wet-flow tested by Holley technicians to assure it arrives ready to run!
Specs:
Model: 4150UXP
CFM: 950
Barrels: 4
Throttle Bore: 1.750 inch
Venturi Size: 1.600 inch
Booster: Down Leg
Secondaries: Mechanical
Choke: None
Fuel: Methanol
Fuel Inlet: Dual
Supercharged Application: No
Material: Aluminum
Finish: Hard Core Gray
Billet Color: Black
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
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