- Fuel, Carbs & Intakes
- Carburetors
- Holley Ultra XP E85 Aluminum Carburetors
Holley Ultra XP E85 Aluminum Carburetors incorporate 30 new features! Specifically designed and calibrated for E85 fuel in drag race or circle track applications, these carbs are anodized Hard Core Gray with black accents.
Overview
- Compatible with E85 fuel
- Available cfm: 500, 600, 650, 750, 850, 950
- 38% lighter because 97% aluminum construction
Show More
- Anodized Hard Core Gray with black billet accents
- Premium finish protects against ethanol's corrosive properties
- 20% more fuel capacity compared to standard V-bowl
- and 100% Holley
Updated Main Body - Cast Holley logo for easy identification by race officials
- Contoured hex head squirter screws for streamlined airflow
- All unnecessary mounting bosses removed for a cleaner appearance
- Air bleeds moved outward for smoother airflow transition from the top of the carburetor into the venturii
- Idle bypass valve eliminates the need for throttle plate holes, allows proper idle adjustment, and maintains idle control with radical camshafts
All-New Fuel Bowl Design - Completely redesigned for racing
- Longer fuel line required due to increased bowl length
- Built-in drain plug (front center) for easy access to empty bowl
- Contoured entry flows fuel smoothly and directly to needle & seat
- Clear Pyrex sight windows (both sides) for safe, simple fuel level adjustment
- Greater fuel capacity prevents fuel starvation and provides consistent air/fuel ratio
- Fuel trough in the bowl "floor" routes fuel directly to the jets and helps keep jets submerged
- Fuel shelf below needle & seat minimizes fuel aeration and promotes more consistent metering
- Material added to needle & seat area, fuel inlet, and sight window area to enhance strength for racing
- Internal baffling controls fuel slosh and reduces float level fluctuation during hard launches and cornering
- -8AN O-ring inlet threads offer many plumbing options from either side (standard with -8AN O-ring to -6AN male adapter and -8AN plug)
6061-T6 Billet Aluminum Baseplate - Boss can be machined for vacuum source
- Primary throttle shaft capped to keep out debris/contaminants
- True gasket sealing, superior corrosion protection, and improved durability
- Factory-machined accessory mounting hole for easy addition of adjustable throttle stop
- Knurled primary and secondary curb idle screws allow idle adjustment by hand without tools
- Dedicated race-only throttle lever (all unnecessary street attachment points & tangs removed)
- Elongated, dual pattern mounting holes accommodate intakes with square flange (Holley 4150) or large flange (Holley Dominator)
- Stainless steel secondary link offers choice of 1:1 or progressive secondary throttle actuation for ultimate control of secondary opening rate
- Throttle body & secondary pump cam lever provide positive throttle stop on secondary side for a reliable 90° opening/return of throttle plates
6061-T6 Billet Aluminum Metering Blocks - Excess material removed for greater fuel capacity
- Snap-in-place bowl vent whistle simplifies removal/replacement
- True gasket sealing, superior corrosion protection, and improved durability
- Accelerator pump channel internally drilled to eliminate need for external plug
- Pry-point assists in disassembly from fuel bowl and main body to prevent gasket damage
- Fully adjustable (emulsion bleeds, power valve channel restrictors, and idle feed restrictors)
- Power valve channel restrictors machined lower in metering block for better fuel delivery to power valve circuit
500 cfm
750 cfm
850 cfm
950 cfm
What Are Holley Ultra XP E85 Aluminum Carburetors Common Pros and Cons?
Holley Ultra XP E85 aluminum carburetors are uniquely manufactured with a lightweight design and use E85 fuel during drag and circle track racing. They also have a great looking "hard core gray" finish. In addition, they have an updated main body, all new fuel bowl design which allows for 20% more fuel capacity, and billet aluminum metering blocks and base plate. There are not any known negative effects from the use of these carburetors.
Which Holley Ultra XP E85 Aluminum Carburetors Are Best?
When selecting the correct model from the Holley Aluminum Carburetors in the Ultra XP E85 line, the first step is confirming the CFM size. This is based on the engine cubic inch displacement and the max RPM /redline. Once the size is confirmed, select the compatible part number.
How Much Do Holley Ultra XP E85 Aluminum Carburetors Cost?
Holley Ultra XP E85 Aluminum Carburetors are available in the $800 to $1200 price range, depending on the options.