The HP Ultra is an expensive carburetor, so Holley introduced a much more affordable Street HP 750 in the bright finish in either vacuum-secondary (PN 0-82750) or double-pumper (PN 0-82751. Exploded View and Nomenclature Manual for Models. Holley>Exploded View and Nomenclature Manual for Models. Carburetor Installation & Accessories. Learn More: https://www. Troubleshooting Your Holley Carb – RacingJunk News>Troubleshooting Your Holley Carb – RacingJunk News. Holley makes several kits—mainly for either the 0-3310 750 cfm or the 0-1850 600-cfm carbs. Your best bet would be to check with Haynes. Help decoding a holley carburator 6r 3752 b. The screws’ length on 4150 and 4160 carbs is 3/8 inch; 4500 carbs tend to use a thicker housing, requiring a screw length of 9/16 inch. Holley 4150 Double Pumper carburetors are a perfect upgrade for hot street cars and race vehicles—theyre an American icon when it comes to performance. 15 Pump Operating Lever Screw Sleeve 16 Modulator Assembly 17 Thermostat Housing Clamp Screw 18 Thermostat Housing Clamp 19 Thermostat Housing Assembly 20 Thermostat Housing Gasket 21 Choke Thermostat Shaft N ut 22 Shaft Nut Lockwasher 23 Thermostat Lever Spacer 24 Thermostat Lever, Link & Piston Assembly. In order for a carburetor to function correctly, it requires the following: (1) Fuel Supply (2) Linkage and emission control systems (3) Engine Compression (4) Ignition system firing voltage (5) Secure intake manifold (6) Engine temperature (7) Carburetor adjustments Any problems in the above areas can cause the following:. 95 Add To Cart Compare Wish List. Holley Model 4150 Aluminum Double Pumper Carburetors 0-4779SAE Carburetors, Model 4150 Aluminum Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Tumble Polished, Gasoline, Each Part Number: HLY-0-4779SAE ( 7 ) Estimated Ship Date: Tomorrow Free Shipping $655. The vacuum-secondary 750 Street uses a two-corner idle circuit, while the 750-cfm double-pumper offers a four-corner idle. new holley 750 cfm double pumper carburetor,gold dichromate,model 4150,electric choke,mechanical secondaries,compatible with gasoline $809. HOLLEY CARBURETOR 750 Double Pumper. The List number for a Model 2010, 2300, 4010, 4011, 4150, 4160, 4165, or 4175 carburetor can be found on the right side of choke air horn. Regulating the airflow into the carburetor are throttle blades that are connected to the throttle pedal. Holley itself has a huge website at Holley. The 650 and 750 CFM models are available in the classic zinc and shiny polished finishes. This carburetor is for use on Motor Vehicle Applications Only! Universal Double Pumper (600, 650, 700, 750, and 800 CFM) Holley Performance Products cannot and will not be responsible for any alleged or actual engine or other damage, or other conditions resulting from misapplication of the products described herein. This is determined by the engine volume, max RPM use, and volumetric efficiency. Three different anodized color options (red, blue, or black) allow for a personalized look while maintaining the ultra high. Hey Folks! Welcome back to the channel. new holley 750 cfm double pumper carburetor,gold dichromate,model 4150,electric choke,mechanical secondaries,compatible with gasoline $809. The carburetor is a wondrous but sometimes-mysterious device mounted on top of an engine that makes it run. Each side of the banjo fitting includes a thin sealing washer. I have a 3310-3 Holley 750 vacuum secondary carb and have two basic questions about hose connections. For anything up to 750 cfm, a 0. Carburetors Product Line: Holley 4150 Double Pumper Carburetors Summit Racing Part Number: HLY-0-4779S UPC: 090127427071 CFM: 750 Fuel Type: Gasoline New or Remanufactured: New Number of Barrels: 4. Please have the part number and sales receipt ready when. Jul 11, 2011. SOURCE: holley carburetor 750 free tune ,rebuild and. The accelerator pump on the primary fuel bowl (and on the secondary fuel bowl of a Double Pumper carb) is secured with four 8-32 screws. 4% or Best Offer Free shipping Sponsored. The way it works is by drawing fuel and air into the engine by way of a vacuum that is created while the engine is running. 110 assembly should be just fine. This is a vacuum secondary 4150 style carburetor with two idle mixture screws. CARBURETORS MODEL 4150 HP SERIES. Learn More FREE Shipping Lowest Price Guarantee Add To Cart 650 cfm Holley 0-4777CE Part Number: 510-0-4777CE. When selecting a Holley 750 cfm 4-bbl Carburetor with electric choke, the first determination needed is the CFM size. They were the replacement for the 660, power valve capable, and progressive secondaries. Typically for smaller carbs, say up to about 650 cfm, Holley’s 0. CONGRATULATIONS on your purchase of Holley carburetor! We feel that you have purchased the finest performance carburetor manufactured today. The original HP carbs are available in sizes ranging from 390 to. Intro BASIC HOLLEY 4779 CARBURETOR SETUP [750 Double Pumper] Kevin Nadeau 9. When selecting a Holley 750 cfm 4-bbl Carburetor with electric choke, the first determination needed is the CFM size. Common Holley Carb Leak Solutions. 95 Add To Cart Compare Wish List Holley 4150 Double Pumper Carburetors 0-4776S. If excessive dirt is found, remove the carburetor unit. CONGRATULATIONS on your purchase of the Aluminum Double Pumper™ Carburetor! We feel that you have purchased the finest street performance carburetor manufactured today. Braided Fuel Line ( 350-8101) Fuel Pressure Gauge ( 555-41010) View Details. On 4160 carbs with a single fuel feed at the primary fuel bowl, a banjo-type fitting may be present on the driver’s side of the fuel bowl. The mechanically operated, double pumper carburetors seldom come with an electric choke. Typically for smaller carbs, say up to about 650 cfm, Holley’s 0. 95 Add To Cart Compare Wish List Holley 4150 Double Pumper Carburetors 0-4776S. The List number for a Model 2010, 2300, 4010, 4011, 4150, 4160, 4165, or 4175 carburetor can be found on the right side of choke air horn. Holley carburetor 0-4779 750 double pumper Bright Zinc manual choke mechanical secondary racing carburetor. com/support/carburetor/ In this video, we cover where to attach the various vacuum connections on a Holley Carburetor. Holley 4150 Double Pumper Carburetors. 64 shipping Sponsored Holley 0-82751SA 750 CFM Double Pumper Aluminum Street HP Carburetor Brand New 5 product ratings $642. Rebuilding a Holley Double. Holley 4150 Double Pumper Carburetors 0. they are 750 tunnel ram carbs with down leg boosters, and side hung bowls, they are a little rare, basically your standard 750 DB with side hung bowls. 00 Add To Cart Add to Wish List Share Starting at $58 a month with Learn More 3. Holley Double Pumper 750 cfm Square Bore 4150 4 Carburetor - 04779S. Shared Specifications Dual metering blocks Dual-feed fuel inlets Center-hung floats Manual choke Power valve blowout protection. The accelerator pump on the primary fuel bowl (and on the secondary fuel bowl of a Double Pumper carb) is secured with four 8-32 screws. ELECTRIC CHOKE HOOKUP & ADJUSTMENT:. This carburetor is for use on Motor Vehicle Applications Only! Universal Double Pumper (600, 650, 700, 750, and 800 CFM) Holley Performance Products cannot and will not be responsible for any alleged or actual engine or other damage, or other conditions resulting from misapplication of the products described herein. Holley Model 4150 Aluminum Double Pumper Carburetors 0-4779SAE Carburetors, Model 4150 Aluminum Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Tumble Polished, Gasoline, Each Part Number: HLY-0-4779SAE ( 7 ) Estimated Ship Date: Tomorrow Free Shipping $655. The List number for the 4500 can be found on the top of the main body casting. Carb Number Carb Model Number Main Jet or plate Primary Metering Block Secondary Metering Block Power Valve Pump Nozzle Size, Primary 750: 37-754 37-933: 6. Today Im going to take off the Holley 4779 750 cfm carburetor on my 1970 Corvette and show you how I do a basic setup. Holley Carburetor Made Easy. Holley Double Pumper Linkage Set Up 3,523 views May 26, 2014 5 Dislike Save conquryourfear & do it urself 15. The vacuum-secondary 750 Street uses a two-corner idle circuit, while the 750-cfm double-pumper offers a four-corner idle. 00 enginebldr20 (269) 100% or Best Offer +$63. Holley Double Pumper® carburetors are a perfect performance upgrade for hot street cars and race vehicles. Holley (ProForm) Carb Problem. 15 Pump Operating Lever Screw Sleeve 16 Modulator Assembly 17 Thermostat Housing Clamp Screw 18 Thermostat Housing Clamp 19 Thermostat Housing Assembly 20. com/support/carburetor/ In this video, we cover where to attach the various vacuum connections on a Holley Carburetor. The List number for a Model 2010, 2300, 4010, 4011, 4150, 4160, 4165, or 4175 carburetor can be found on the right side of choke air horn. I upgraded the center section main body to one of those ProForm (see photo) aftermarket performance racing bodies. This kit is a rebuild/refresh kit that comes with all the gaskets/seals/needle&seats, etc. 750 CFM Ultra Double Pumper Carburetor. For many applications, choose from a carburetor by itself or two kit options: one with a braided fuel line or another with both a fuel line and JEGS liquid-filled fuel pressure gauge. used holley 750 double pumper for sale. A 750 double pumper Holley carburetor is a high performance carburetor that incorporates two accelerator pumps that are manually operated. (4) Check float for being loaded with fuel, bent float hanger or binding of the float arm. Using an 11/16-inch wrench, rotate the banjo bolt counterclockwise to loosen and then remove it. Holley Carburetor: Fuel and Fuel Supply Systems Guide. Holley LIST 4779 750cfm carb double pumper HP progressive linkage Pre-Owned $249. The following tuning section is included ONLY to aid you in fine tuning adjustments. Overview. The Ultimate Guide to Holley Carburetors. Holley 750 cfm 4150 Rebuild A to Z with a Percys Adjust-A-Jet Addition Vacuum Secondary Oldsmob455 30. Find Holley Ultra Double Pumper Carburetors and get Free Shipping on Orders Over $109 at Summit Racing! Holley Ultra Double Pumper Carburetors feature all aluminum construction and are equipped with metering blocks and a base plate made from 6061-T6 billet aluminum. The carb still has the stock 30cc shooter (single shooter - not double pumper) stock jets and air bleeds and #65 power valve. In particular, the Holley 4779 750cfm double-pumper is a special favorite for street. Holley Classic Double Pumper Carburetor Kit 700 CFM. You may have to register before you can post: click the register link above to proceed. Holley upgraded their two most popular sizes of double pumper with electric chokes. Engine will run both unleaded and gas, this 750 is the only one we have and yeah going off what you all have said, Ill eventually buy a 650 then sell the 750 and shouldnt lose too much there!. Carb Number Carb Model Number Main Jet or plate Primary Metering Block Secondary Metering Block Power Valve Pump Nozzle Size, Primary 750: 37-754 37-933: 6. The HP Ultra is an expensive carburetor, so Holley introduced a much more affordable Street HP 750 in the bright finish in either vacuum-secondary (PN 0-82750) or double-pumper (PN 0-82751. 97 needle and seat generally does the job. An 850 cfm double pumper turns out to be a 650 cfm with vacuum secondaries. This is a 750 cfm Holley carburetor that we’ll be using to set idle quality on a small-block Chevy on a test stand. Holley 0-76750HB 750 CFM Ultra Double Pumper Carburetor 4 $85795 FREE delivery May 1 - 2 NEW QUICK FUEL TECHNOLOGY BRAWLER STREET CARBURETOR,RED BILLET BLACK FINISH,MECHANICAL SECONDARIES,750 CFM,4150 MODEL,COMPATIBLE WITH GASOLINE 17 100+ viewed in past week $54995 FREE delivery Tue, May 2 Or fastest delivery Fri, Apr 28. Holley Street Warrior Carburetors 0-80457S Carburetor, Street Warrior, 600 cfm, Square Bore, 4-Barrel, Electric Choke, Single Inlet, Silver, Each Part Number: HLY-0-80457S ( 239 ) Estimated Ship Date: Tomorrow Free Shipping $427. Should you need information or parts assistance, please contact our Technical Service Department at 1-866-464-6553, Monday through Friday, 8 a. In an effort to help our viewers identify which Holley carb they have or what carburetor they want to buy, weve put this list together. Holley 750 Double Pumper Carburetor>Amazon. Today Im going to take off the Holley 4779 750 cfm carburetor on my 1970 Corvette and show you how I do a basic se. com with all of their products listed. Carburetors, Model 4150 Aluminum Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Tumble Polished, Gasoline, Each Part Number: HLY-0-4779SAE 3. This video will cover some of the basic steps. 750 CFM HOLLEY DOUBLE PUMPER CARBURETOR 4779. Carburetors, 4150 Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Dual Fuel Inlet, Dichromate, Gasoline, Each Part Number: HLY-0-4779CE ( 6 ) Estimated Ship Date: Today Free Shipping $731. 9K subscribers How your Holley Double Pumper carburetor linkage should be set. The new Ultra Double Pumper Carburetors have an enhanced fuel curve for optimum performance, with many more features such as aluminum construction; anodized billet aluminum metering blocks and base plate; 4 corner idle for precise idle control; dual accelerator pumps for additional fuel under initial acceleration; mechanical secondaries for. A 750 double pumper Holley carburetor is a high performance carburetor that incorporates two accelerator pumps that are manually operated. Classic Double Pumper Carburetor Kit 600 CFM Braided Fuel Line ( 350-8101) Fuel Pressure Gauge ( 555-41010) View Details $854. Carburetor Numerical Listing for Part #0-76750BK. Holley makes several kits—mainly for either the 0-3310 750 cfm or the 0-1850 600-cfm carbs. How to Tune a 750 Double Pumper Holley Carburetor. 15 Pump Operating Lever Screw Sleeve 16 Modulator Assembly 17 Thermostat Housing Clamp Screw 18 Thermostat Housing Clamp 19 Thermostat Housing Assembly 20 Thermostat Housing Gasket 21 Choke Thermostat Shaft N ut 22 Shaft Nut Lockwasher 23 Thermostat Lever Spacer 24 Thermostat Lever, Link & Piston Assembly. HOLLEY 4779 CARBURETOR REBUILD. Does the vacuum advance of the distibutor connect at the baseplate (manifold vacuum) or on the side of the metering plate (I think ported vacuum)? 2. Visit our How to Choose a Carburetor For Your Car article to help you determine the correct CFM. PERFORMANCE CARBURETOR INSTALLATION AND ADJUSTMENT. Holley 0-76750HB 750 CFM Ultra Double Pumper Carburetor 4 $85795 FREE delivery May 1 - 2 NEW QUICK FUEL TECHNOLOGY BRAWLER STREET CARBURETOR,RED BILLET BLACK FINISH,MECHANICAL SECONDARIES,750 CFM,4150 MODEL,COMPATIBLE WITH GASOLINE 17 100+ viewed in past week $54995 FREE delivery Tue, May 2 Or fastest delivery Fri, Apr 28. Carburetors, 4150 Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Dual Fuel Inlet, Dichromate, Gasoline, Each Part Number: HLY-0-4779CE ( 6 ) Estimated Ship Date: Today Free Shipping $731. Intro BASIC HOLLEY 4779 CARBURETOR SETUP [750 Double Pumper] Kevin Nadeau 9. These 4-barrel carbs sport the classic Holley finish. The engine is a rebuilt 327 with mild cam etc. Estimated to ship direct from manufacturer on 06/30/23, pending manufacturer availability. PERFORMANCE CARBURETOR INSTALLATION …. Troubleshooting Your Holley Carb – RacingJunk News. Double Pumper If a 4150 carb has mechanical secondary operation, it has both a primary and secondary accelerator pump, and is referred to as a Double Pumper carb. If this is your first visit, be sure to check out the FAQ by clicking the link above. 6K views 2 years ago #Carburetor #Holley Hey Folks! Welcome back to the channel. Carburetors, 4150 Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Dual Fuel Inlet, Dichromate, Gasoline, Each Part Number: HLY-0-4779CE ( 6 ) Estimated Ship Date: Today Free Shipping $731. Complete History of the Holley Carburetor • Muscle Car DIY>Complete History of the Holley Carburetor • Muscle Car DIY. Just let it idle for about a min. they are 750 tunnel ram carbs with down leg boosters, and side hung bowls, they are a little rare, basically your standard 750 DB with side hung bowls. 95 Add To Cart Compare Wish List Holley Street Warrior Carburetors 0-1850S. Here Is The Correct Procedure For Setting An …. The “out of the box” settings should be very close for all adjustments. The carb is Holley 750, model 4160, vacuum secondary, dual feed with center hung floats. PDF PERFORMANCE CARBURETOR INSTALLATION AND ADJUSTMENT INSTRUCTIONS. Holley carburetor 750 double pumper manual. If I wanted better gas mileage id rather put on a smaller Holley DP than a vacuum sec. This carburetor is for use on Motor Vehicle Applications Only! Universal Double Pumper (600, 650, 700, 750, and 800 CFM) Holley Performance Products cannot and will not be responsible for any alleged or actual engine or other damage, or other conditions resulting from misapplication of the products described herein. 95 Add To Cart Compare Wish List Holley 4150 Double Pumper Carburetors 0-4776S. Double Pumper 750 Holley Holley Carb DiagramDouble Pumper Aftermarket 650-750 Butterfly# 172 Pri. 750 Holley Vacuum Line + Distributor Vacuum Advance Adj. Below the list number is a date code that will contain no more than four (4) digits. Double Pumper Carb rebuild kit Fits - Holley 4776,4777,4778,4779, 4780,4781 37-485 KT-5278B Aftermarket Double Pumper Carb rebuild kit Fits - Holley 4776,4777,4778,4779, 4780,4781 Gasket Colors may Vari. In this video Im going to install a Holley Trickit in my Holley 750 double pumper carb. It has a large hose fitting at the back of the baseplate. The carb is Holley 750, model 4160, vacuum secondary, dual feed with center hung floats. 750 CFM Double Pumper Carburetor + 7 Images Videos Larger Image Holley 750 CFM Double Pumper Carburetor 0-4779S Manual Choke Mechanical Secondaries-4150 Part. Exploded View and Nomenclature Manual for Models 2010, …. Beyond that, a larger assembly might be needed. If excessive dirt is found, remove the carburetor unit. Should you need information or parts assistance, please contact our Technical Service Department at 1-866-464-6553. In order for a carburetor to function correctly, it requires the following: (1) Fuel Supply (2) Linkage and emission control systems (3) Engine Compression (4) Ignition system firing voltage (5) Secure intake manifold (6) Engine temperature (7) Carburetor adjustments Any problems in the above areas can cause the following:. Holley Carburetor Disassembly Guide: Rebuild Step. Classic Double Pumper Carburetor Kit. 6K subscribers Subscribe 141K views 9 years ago Pretty typical vacuum secondary Holley. Im running Holley 750 DP setup by Pro-system. 750 CFM Double Pumper Carburetor + 7 Images Videos Larger Image Holley 750 CFM Double Pumper Carburetor 0-4779S Manual Choke Mechanical Secondaries-4150 Part # 0-4779S 1 Review In Stock Free Shipping - Lower 48 US States Your Price $655. 750 Holley Vacuum Line + Distributor Vacuum Advance Adj>750 Holley Vacuum Line + Distributor Vacuum Advance Adj. Holley Double Pumper Linkage Set Up 3,523 views May 26, 2014 5 Dislike Save conquryourfear & do it urself 15. Holley Classic Double Pumper Carburetors & Kits. Holley makes several kits—mainly for either the 0-3310 750 cfm or the 0-1850 600-cfm carbs. Tuning a Vacuum Secondary of a Holley Carb. The 650 and 750 CFM models are available in the. INSTALLATION, TUNING, AND ADJUSTMENT …. 15 Pump Operating Lever Screw Sleeve 16 Modulator Assembly 17 Thermostat Housing Clamp Screw 18 Thermostat Housing Clamp 19 Thermostat Housing Assembly 20 Thermostat Housing Gasket 21 Choke Thermostat Shaft N ut 22 Shaft Nut Lockwasher 23 Thermostat Lever Spacer 24 Thermostat Lever, Link & Piston Assembly. Today Im going to take off the Holley 4779 750 cfm carburetor on my 1970 Corvette and show you how I do a basic setup. 95 Add To Cart Compare Wish List Holley 4150 Double Pumper Carburetors 0-4776S. Carby is square bore, vacuum, CFM 4 barrell holley. Carburetors, Model 4150 Aluminum Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Tumble Polished, Gasoline, Each Part Number: HLY-0-4779SAE 3. com/support/carburetor/ In this video, we cover where to attach the various vacuum connections on a Holley. Depending on the model, 4-barrel carburetors have either vacuum-operated secondaries or mechanical secondaries. Holley Ultra Double Pumper 750 - Holley Performance Products Forums. Chilton or Motor have a good rebuild section in their yearly manuals and it covers Holleys with the specs for your vehicle. Intro BASIC HOLLEY 4779 CARBURETOR SETUP [750 Double Pumper] Kevin Nadeau 9. What you need cant be described here. 750 CFM Double Pumper Carburetor + 7 Images Videos Larger Image Holley 750 CFM Double Pumper Carburetor 0-4779S Manual Choke Mechanical Secondaries-4150 Part # 0-4779S 1 Review In Stock Free Shipping - Lower 48 US States Your Price $655. This model of carburetor has the square bore flange bolt pattern. Carburetors, 4150 Double Pumper, 750 cfm, 4-barrel, Square Bore, Mechanical Secondary, Electric Choke, Dual Fuel Inlet, Dichromate, Gasoline, Each Part Number: HLY-0-4779CE ( 6 ) Estimated Ship Date: Today Free Shipping $731. Install the carburetor-mounting studs in the proper location on the intake manifold carburetor flange. Select a store to see pricing & availability or search by City & State or Zip: 90 Day Limited Warranty Holley Double Pumper 750 cfm Square Bore 4150 4 Carburetor - 04779C. This carburetor is for use on Motor Vehicle Applications Only! Universal Double Pumper (600, 650, 700, 750, and 800 CFM) Holley Performance Products. IMPORTANT: The Aluminum Double Pumper™ carburetor has been factory wet-flowed and calibrated. H25-73 H25-48 Double Pumper Aftermarket 800-850 Butterfly# 180 Pri. A Holley carb is the old reliable of a traditional hot rod, used so dependably over the last bazillion years. Holley Double Pumper Linkage Set Up. H25-48 80-248 Throttle base plate Screws OE style 80-248 Misc We have most Holley parts available Call 253-833-4106 or E-Mail Holley Diagrams More Holley Parts Here. Holley 0-76750HB 750 CFM Ultra Double Pumper Carburetor 4 $85795 FREE delivery May 1 - 2 NEW QUICK FUEL TECHNOLOGY BRAWLER STREET CARBURETOR,RED BILLET BLACK FINISH,MECHANICAL SECONDARIES,750 CFM,4150 MODEL,COMPATIBLE WITH GASOLINE 17 100+ viewed in past week $54995 FREE delivery Tue, May 2 Or fastest delivery Fri, Apr 28. CONGRATULATIONS on your purchase of the Aluminum Double Pumper™ Carburetor! We feel that you have purchased the finest street performance carburetor manufactured today. Intro BASIC HOLLEY 4779 CARBURETOR SETUP [750 Double Pumper] Kevin Nadeau 9. (3) Check float needle and seat for proper seal. 750 CFM Double Pumper Carburetor + 7 Images Videos Larger Image Holley 750 CFM Double Pumper Carburetor 0-4779S Manual Choke Mechanical Secondaries-4150 Part # 0-4779S 1 Review In Stock Free Shipping - Lower 48 US States Your Price $655. Place the new carburetor flange gasket, provided with the. The conversion kit adds the rear metering block along with the required different metering block. The holley carburetor is known for its constant leaks but in this video I will not only show you the causes of the leaks but also the solutions and how to fix them. On 4160 carbs with a single fuel feed at the primary fuel bowl, a banjo-type fitting may be present on the driver’s side of the fuel bowl. Holley and several other manufacturers make them up to 0. 750 CFM HOLLEY DOUBLE PUMPER …. Used for high performance or larger displacement engines, they are infinitely tunable. CONGRATULATIONS on your purchase of Holley carburetor! We feel that you have purchased the finest performance carburetor manufactured today. If the needle is defective, replace with a Holley matched set. Double Pumper If a 4150 carb has mechanical secondary operation, it has both a primary and secondary accelerator pump, and is referred to as a Double Pumper carb. Holley upgraded their two most popular sizes of double pumper with electric chokes. Holley 0-76750HB 750 CFM Ultra Double Pumper Carburetor 4 $85795 FREE delivery May 1 - 2 NEW QUICK FUEL TECHNOLOGY BRAWLER STREET. 29 Estimated to ship direct from manufacturer on 06/30/23, pending manufacturer availability. A Holley carb is the old reliable of a traditional hot rod, used so dependably over the last bazillion years. In this video Im going to install a Holley Trickit in my Holley 750 double pumper carb. I have a 3310-3 Holley 750 vacuum secondary carb and have two basic questions about hose connections.