Description
950 CFM – 4150 – Mechanical Secondaries – Hard Core Gray – E85Aluminum Construction (saves 4.5 lbs – 38% weight savings)Hard Core Gray with black anodized billet aluminum metering block and booster insertsDesigned for use on Drag race, circle track, or any high horsepower enginesE85 specific calibrationContoured venturri inlet offers balanced airflow for increased horsepowerAir bleeds moved outward to allow a smoother transition of airflow from the top of the carburetor into the venturiiMetering 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.Fuel bowls provide 20% more fuel capacity while controlling slosh with internal bafflingClear sight windows on both sides of bowls for easy and safe fuel level adjustmentsBuilt in drain plug in front center of bowl provides easy access to empty contents of bowl8AN(o-ringed) inlet threads offer a large variety of plumbing options and can be plumbed from either side.130″ stainless needle seats to control the demand of E-854 corner idle allows you to precisely control your idle systemMechanical Secondaries for perfect off the line launchesElongated (dual pattern) mounting holes allow fitment on intakes with square flange (Holley 4150â?¢ 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 toolsPrimary throttle shaft capped to prevent entry of debris contaminatesThrottle shaft is slabbed and undercut for improved airflowFactory machined accessory mounting hole for easy addition of adjustable primarythrottle stop. New secondary pump cam lever designed to provide positive throttle stop on secondary sideStainless steel adjustable secondary link. Provides choice of 1:1 or progressivesecondary throttle actuation for ultimate control of secondary opening rateBaseplate designed with a boss that can be consumer machined for vacuum sourceStainless steel throttle platesIncludes notched float and jet extensions100% wet-flow tested by Holley technicians to assure it arrives ready to run!Xtreme Performance – Holley Ultra XPâ?¢ carburetors!Ultra XP carbs are up to 38% lighter than our traditional race carbs, have fuel capacity that is 20% greater and 30 other new features!They’re available in our all-new Hard Core Grayâ?¢ hard coat anodized finish with Blackâ?¢ billet for improved corrosion protection. They’re also available in natural tumble-polished aluminum with your choice of Blackâ?¢ or Redâ?¢ metering blocks and base plate. The Aluminum Ultra XP comes in 600, 650, 750, 850, and True 950-CFM. Holley Ultra XP 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!
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