Pavtek Part # HL-0-80805HBX
Holley HP Carburetors have been the standard in racing Carburetors for nearly two decades. So how do you make them better? You make them 38% lighter, increase the fuel capacity by 20% and add 30 other new features! They’re available in our all–new Hard Core Gray™ hard coat anodized finish with Black™ billet for superior corrosion protection. They’re also available in natural tumble–polished aluminum with your choice of Black™ or Red™ metering blocks and base plate. The Aluminum Ultra HP comes in 600, 650, 750, 850, and True 950–CFM.
*Requires 9.75–inch spread fuel line, options at the bottom of the page.
• 100% Holley – Made in the U.S.A.
• 97% aluminum construction
• 38% weight savings
• 20% more fuel bowl capacity
• 10 new fuel bowl features
• 10 new base plate features
• 6 new metering block features
• 5 new main–body features
• 1 new carburetor…Ultra HP
Features
- American Made – Materials and Assembly
- Aluminum Construction (saves 4.5 lbs – 38% weight savings)
6061T6 BILLET ALUMINUM METERING BLOCKS
- Improved durability, true gasket sealing (sealing surface integrity), bright dipped anodized for good looks and corrosion protection
- Fully adjustable (emulsion bleeds, power valve channel restrictors & idle feed restrictors). Power valve channel restrictors now machined lower in metering block for improved fuel delivery to power valve circuit
- Accelerator pump channel now internally drilled eliminating need for external plug
- Excess material removed for improved fuel capacity
- Integrated pry-point assists in disassembly from fuel bowl and mainbody preventing damage to gaskets and gasket surfaces
- New snap in place bowl vent whistle makes removal and/or replacement easier
6061T6 BILLET ALUMINUM BASE PLATES
- Improved durability, true gasket sealing, bright dipped anodized for good looks and corrosion protection
- Elongated (dual pattern) mounting holes allow fitment on intakes with square flange (Holley 4150™ style) or large flange (Holley Dominator® style)
- Dedicated race-only throttle lever with all unnecessary street attachment points & tangs removed
- 950 CFM throttle shaft comes slabbed and undercut for improved airflow
- Stainless steel adjustable secondary link. Provides choice of 1:1 or progressive secondary throttle actuation for ultimate control of secondary opening rate
- 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
- Factory machined accessory mounting hole for easy addition of adjustable throttle stop
- Throttle body and new secondary pump cam lever designed to provide positive throttle stop on secondary side. Delivers safe & reliable 90° opening and return of throttle plates while ensuring maximum airflow
- Baseplate designed with a boss that can be consumer machined for vacuum source
ALL NEW FUEL BOWL DESIGN
- Completely redesigned from the ground up for racing
- 20% more fuel capacity vs. a traditional v-bowl eliminates fuel starvation and provides consistent air/fuel ratios
- Internal baffling to help control fuel slosh and minimize float level fluctuations in hard launching or cornering situations
- Fuel shelf below the needle and seat to greatly minimize fuel aeration and promote more consistent metering
- Fuel trough designed into floor of bowl to route fuel flow directly to the jets and assist in keeping jets covered by fuel
- Clear Pyrex® sight windows on both sides of bowls for easy and safe fuel level adjustments
- (A) Built in drain plug in front center of bowl provides easy access to empty contents of bowl
- (B) Contoured entry provides smooth fuel flow directly to needle & seat
- -8AN (o-ringed) inlet threads offer a large variety of plumbing options (come standard with -8AN o-ring to -6AN male adapter and -8AN plug). Can be plumbed from either side
- Material added in key areas (needle & seat area, fuel inlet, sight window area) for added strength in the demanding race environment
- Note: New lengthened fuel line required due to increased length of bowls (see Holley p/n 34-42, 34-43, 34-44 or Earl’s p/n AT104195ERL, AT104295ERL & AT104286ERL)
UPDATED MAIN BODY DESIGN
- Air bleeds moved outward to allow a smoother transition of airflow from the top of the carburetor into the venturii
- 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. H elps maintain good idle control when using radical camshafts.
- All unnecessary mounting bosses removed for a smoother, cleaner appearance
- Contoured hex head squirter screws for streamlined airflow
- Cast in Holley HP logo for easy identification by race sanctioning bodies
- Available in 600, 650, 750, 850 and True 950 CFM
- Available tumble polished with Red™ or Black™ billet.
- Available in all new Hard Core Gray™ hard coat anodized with Black™ billet. First-ever hard coat anodizing on fuel bowls and mainbody – actually penetrates the aluminum for superior corrosion protection.
- Adjustable Throttle Stop bracket and WOT Microswitch brackets available
- Due to hard coat anodizing process on cast aluminum, some color variation may be visible on Hard Core Gray™ carbs.
ORIGINAL HP FEATURES
- Power valve blowout protection
- 4-corner idle
- 30cc GLFT accelerator pumps
- Screw-in air bleeds
- Dominator style fuel bowls allow plumbing from either side
- Symmetrical venturii bores
- Spun in boosters
- Notched floats and jet extensions
- Stainless steel throttle plates