Holley Metering Block DiagramMetering Block Assembly. In the top metering block, the idle jet is at the bottom of the main jet well (red arrow). In every Holley two- and four-barrel carburetor, the power valve is located primarily in the primary metering block, though there are models that have a power. Holley 4 corner idle question. Needle & Seat Primary Main Jet Secondary Main Jet or plate Primary Metering Block Secondary Metering Block Power Valve Pump Nozzle Size, Primary Secondary Nozzle Size or Spring Color Primary Bowl Gasket Primary Metering Block Gasket Secondary Bowl Gasket Secondary Metering Block Gasket Secondary Metering Plate Gasket Primary Fuel Bowl Secondary …. Secondary Metering Block, 0-80770. The front block # is 6283 with #72 jets and a 8. There are some tuning features that this block has that are illustrated below. “The third circuit is essentially a pullover system,” Benoit said. Using a 1-inch box wrench is certainly acceptable, but you must be careful not to dig the wrench into the metering block. After this has been done, you can begin adjusting all of the idle mixture screws. Many Holley performance carburetors use a secondary metering plate, with drilled restrictions, rather than a secondary metering block, with removable jets. Installation is no different than a conventional metering block. Don't think you can just add on as the secondary air horn will have to have transfer slots , I believe. Carburetor Metering BlockRace Calibration Model. To supply the required amount of idle air without using up all the transition slot, it may be necessary to drill holes into the butterflies. Holley offers two different metering block conversion kits. This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled. Installation is no different than a conventional metering block. The layout for HP carburetor metering blocks and Dominator carbs will look slightly different from this standard Holley two-circuit metering block, but most of the circuits are exactly. adapts the Model 4500 to AFB- Holley square flange manifolds. I had planned on taking a pin gauge and set the block up as the factory blocks. Three-circuit metering systems bypass the metering blocks by pulling fuel directly out of the fuel bowl and into the venturi. Using a 1-inch box wrench is certainly acceptable, but you must be careful not to dig the wrench into the metering block. In a pinch, you can use a small flat-blade screwdriver of the. CONGRATULATIONS on your purchase of Holley carburetor! We feel that you have purchased the finest performance carburetor manufactured today. Holley makes several kits—mainly for either the 0-3310 750 cfm or the 0-1850 600-cfm carbs. 4 corner metering blocks are specific. Holley Idle Feed Restrictor Mod. What are you trying to do? Make a 4 corner DP out of a single squirter? TC # 349. 111 Primary Metering Body Filler 112 Vacuum Tube Plug 113 Idle Limiter Cap 114 Idle Adjustment Needle 115 Idle Adjustment Needle Seal 116 Spark Hole Plu g 117 Metering Body Vent Baffle 118 Primary Metering jet 119 Tube & O -Ring Assembly 120 Primary Metering Body Gasket 121 Primary Power Valve Assembly 122 Primary Power Valve Gasket. 111 Primary Metering Body Filler 112 Vacuum Tube Plug 113 Idle Limiter Cap 114 Idle Adjustment Needle 115 Idle Adjustment Needle Seal 116 Spark Hole Plu g 117 Metering. Metering Block Secondary Metering Block Power Valve Pump Nozzle Size, Primary Secondary Nozzle Size or Spring Color Primary Bowl Gasket Primary Metering Block. The Chevrolet Performance emblem/logo is a registered. Holley’s Ultra models have an adjustable idle air bypass screw (yellow arrow). The feed tube that fits into the main well is a restriction on flow and can create issues. As stated, you need two circuit blocks, and appear to have three circuit blocks. 94 Add To Cart Compare Wish List Quick Fuel Carburetor Metering Blocks 34-12QFT Metering Block, Aluminum, Quick Fuel Modified Metering Block, Each Part Number:. Step 1: Inspect Metering Plate A 4160 carb has a metering plate on the secondary side, instead of a jet-equipped metering block. Both have the same intermediate air bleed. The one we'll use for this story is aimed at the 0-3310C but there's also a conversion for the 600-cfm single. Holley offers a wide range of metering plates for tuning 4160 carburetors. I have no secondary transfer slot showing and about 0. Carb Science Series: How to Speak Holley Four …. My records show the #11166 block to be a primary block for a 4779DP. Just got a hold of a used Holley 1150 3 circuit, would like to change it over to a 2 circuit. Holley's products include carburetors, fuel pumps, fuel injection,. Carburetor Metering Block Conversion Kit Ignition Conversion Kit Brand Proform Race Series 7 products PART #67146 Carburetor Metering Block Secondary Conversion Kit PART #67150C Carburetor Metering Block Race Calibration Model PART #67163C Carb. Optimizing the size of this jet is the first step in achieving good cruise fuel economy. Jets, power valves, gaskets, fuel lines, brackets etc. This carburetor has a part number of 4777-2 and used on 650 CFM Double Pumper. On the right (yellow arrow) is the replaceable style for the Ultra range of Holley carbs. The conversion kit (foreground) replaces the metering plate like on the 4160-style carb on the left and replaces it with a metering block like the 4150-style carburetor on the right. The common screws used today have a hex head, which require a 5/16-inch wrench. Re: HELP!!!Holley metering block ID. Many of the aftermarket three circuit carbs now use a divorced idle feed circuit that eliminates that problem. Most Holley carbs are fitted with no power valve in the secondary metering block. Uses standard 1/4 x 32 Holley® jet thread. is a participant in the Chevrolet Performance license program. The feed is located on the fuel bowl side of the metering block (location shown above). PDF Holley Carburetor Numerical Listing. Holley performance carburetors are equipped with a fuel bowlthat is designed either for a center pivot or a side pivot float. Holley Secondary Metering Plates MAIN HOLE IDLE HOLE HOLLEY PART "A" "B" P/N STAMPED. They each have their own circuits. Conventional Holley primary metering blocks will not interchange onto the 4180. Some parts are not legal for use in California or other states with similar regulations. 5 power valve and in the rear is a # 10547 block with #76 jets and also a 8. Holley">COMPETITION CARBURETORS MODEL 4150 HP SERIES. PDF COMPETITION CARBURETORS MODEL 4500 DOMINATOR. I also have some info on intermediate circuit blocks that might be of interest. 8 KB Views: 23,932 See less Reply Save Like. There are small holes in the front blades about 3/32" diameter but they are on the opposite side of the idle port (ie. What makes the Holley 4180 different from its aftermarket 4150/4160/1850 cousins is the tamper-proof metering block that makes it virtually impossible to adjust the idle air mixture. Holley Brand base plates H25-46 1850 Style Aftermarket Butterfly# 109 Pri. This carburetor was made by Holley , The Holley Brothers Company was started in 1905 in Detroit Michigan then became the Holley Carburetor Co. Installation and Adjustment Instructions CONGRATULATIONS on your purchase of Holley carburetor! We feel that you have purchased the finest performance carburetor manufactured today. Metering Block, Secondary, Billet Aluminum, Red Anodized, Holley/Quick Fuel 4160 Series Carburetors, Each Part Number: QFT-34-66QFT ( 3 ) Estimated Ship Date: Today $79. There are 2 per metering block front/rear (none on the rear of a stock 3310-2) Using a thick straight screwdriver, remove both jets, there are no gaskets here. Needle & Seat Primary Main Jet Secondary Main Jet or plate Primary Metering Block Secondary Metering Block Power Valve Pump Nozzle Size, Primary Secondary Nozzle Size or Spring Color Primary Bowl Gasket Primary Metering Block Gasket Secondary Bowl Gasket Secondary Metering Block Gasket Secondary Metering Plate Gasket Primary Fuel Bowl Secondary …. Step 1: Remove Float Bowl Screws Years ago, some Holley fuel-bowl screws had a slotted head that required using a flat-blade screwdriver. How To Tune The Power Valve In A Holley Carburetor. COMPETITION CARBURETORS MODEL 4150 HP SERIES. Looking at the quick fuel billet 2 circuit metering blocks. COMPETITION CARBURETORS MODEL 4500 …. Holley Carburetor: Idle and Transition Circuit Calibration Guide">Holley Carburetor: Idle and Transition Circuit Calibration Guide. Holley Performance Products highly recommends that a quality fuel filter be installed with any replacement carburetor to catch any dirt that may still remain in the system. Step 2: Remove Metering Plate Screws The metering plate is secured to the. Set the gaskets aside, organizing them next to the fuel bowl and metering block. The #6541 and #11180 blocks to be primary blocks for a 4779DP. I've tried about all I can think of to get rid of an off idle stumble with no luck. 4160 to 4150 Conversion Kit. Metering Block Standard Finish PN [0-1850C] Or Most Any Model 4160 w/Side Hung Float Bowl Features: Allows Use Of Main Jets Complete With Longer Bowl Screws, Gaskets, And Transfer Tube About Holley Holley. Installation parts, service parts, tuning parts and rebuild kits for Holley carburetors. I have came across what appears to be a Holley 1000 HP carb. Throttle Shafts: Floats: Accelerator Pumps. 2 circuit with standard 1/4 x 32 Holley® jet thread. This ensures the gasket will be in perfect register every time. Replacement Metering Block Kit. 37 Fuel Bowl Gasket 38 Metering Body Vent Baffle 39 Main Metering Jet 40 metering Body 41 Idle Limiter Cap 42 Idle Needle 43 Idle Needle Seal 44 Metering Body Gasket. 586-67166 is a standard replacement block for 2300-, 4150- and 4160- series carbs and offers improved throttle response. There were great write ups on this subject before. The layout for HP carburetor metering blocks and Dominator carbs will look slightly different from this standard Holley two-circuit metering block, but most of the. An exploded diagram of the metering block and idle mixture screws (in red) The first step to getting proper idle is checking for vacuum leaks. Replaceable idle air bleeds (yellow arrows) are used in the top-of-the-line street and race Holley carbs, making a change easy. 780 rear bowl/float/metering block This screw is your secondary stop screw and must be set off the car, see Step 2 below after the rebuild section. Holley secondary metering plates are secured to the main body with six 8-32 x 1/2-inch flat-top screws that feature clutch-head drive; use a 5/32-inch clutch-head driver. Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. 100% wet-flow tested by Holley technicians to assure it arrives ready to run! Primary Metering Block, 0-80670. Remove nozzle pump screw and 2 paper gasket Then remove the needle Pump discharge needle orientation (paper gasket on each side of the pump nozzle). This metering block has drilled PVCR holes – in this case for the 750 cfm Holley uses 0. 56 Part# 108-200 Add To Cart *Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages. Metering Block Kit. 4 corner metering blocks are specific. Front metering block is stamped 8543-5 and rear is 9108-3. An externally adjustable needle and seat assembly is used sothat the float level can be easily adjusted without the need todisassemble the carburetor. As stated, you need two circuit blocks, and appear to have three circuit blocks. Should you need information or parts assistance, please contact our Technical Service Department at 1-866-464-6553, Monday through Friday, 8 a. Installation and Adjustment Instructions CONGRATULATIONS on your purchase of Holley carburetor! We feel that you have purchased the finest performance carburetor manufactured today. It outlines the steps to relocate the Idle Feed Restrictors (IFR) in the metering block(s) on Holley carburetors from the bottom to the top of the idle feed passage thus creating a more responsive idle and circuit performance. I also have some info on intermediate circuit blocks that might be of interest. Set the gaskets aside, organizing them next to the fuel bowl and metering block. Holley Brand base plates H25-46 1850 Style Aftermarket Butterfly# 109 Pri. 9375-1 (1050 cfm) intermediate feed =. Repeat this process for all of the idle mixture screws. 111 Primary Metering Body Filler 112 Vacuum Tube Plug 113 Idle Limiter Cap 114 Idle Adjustment Needle 115 Idle Adjustment Needle Seal 116 Spark Hole Plu g 117 Metering Body Vent Baffle 118 Primary Metering jet 119 Tube & O -Ring Assembly 120 Primary Metering Body Gasket 121 Primary Power Valve Assembly 122 Primary Power Valve Gasket. 2 circuit with standard 1/4 x 32 Holley® jet thread. 5 power valve and in the rear is a # 10547 block with #76 jets and also a 8. Holley's products include carburetors, fuel pumps, fuel injection, intake. Tuning Your Holley Carburetor Made Easy. Upgrade it for serious performance using these billet aluminum metering blocks. Holley Quick Fuel Product Type Idle Mixture Screw Main Jet Tap Tool Metering Block Plug Replacement Metering Block Kit Replacement Metering Plate Items 1 - 27 of 27 Items. The conversion kit adds the rear metering block along with the required different metering. The smaller tube attached to the metering block is timed spark (vacuum provided anytime after off idle). Replacement Metering Plate. Holley Carburetor Full Power Circuit Calibration Guide. 3 circuit that incorporates an idle tube in the main. Holley Carburetor: Idle and Transition Circuit Calibration Guide. Holley Carburetor Operating Principles. Did a search on google came up empty. Description 1 Dashpot Locknut 2 Dashpot Assembly 3 Dashpot Bracket Screw 4 Dashpot Bracket 5 Fuel Bowl Screw 6 Bowl Screw Gasket 7 Fuel Bowl Assembly 8 Fuel Valve Seat Lockscrew 9 Lockscrew Gasket 10 Fuel Valve Seat Adjustment Nut 11 Adjustment Nut Gasket 12 Fuel Valve Assembly 13 Fuel Valve O-Ring Seal 14 Float Retainer. PDF Inside Your Holley Fuel Inlet System Carburetor. A helpful hint: All of the vacuum readings on the vacuum gauge should be the same. The front block # is 6283 with #72 jets and a 8. 3 circuit that incorporates an idle tube in the main well. Adapter height is 2-1/4 inches. 029 34R9716-32 32 Metering Block Service Parts Part # FINISH APPLICATION 34-6 standard 0-1850 or most any model 4160 with side hung float bowls. Metering Blocks and Plates Metering Blocks And Plates Availability In Stock Brand Holley Quick Fuel Product Type Idle Mixture Screw Main Jet Tap Tool Metering Block Plug Replacement Metering Block Kit Replacement Metering Plate Items 1 - 27 of 27 Items Sort 1 Metering Blocks And Plates. Holley carburetors feature idle mixture screws which control the air/fuel ratio and these are usually the main culprits in an improperly idling carb. This AED-modified Holley Dominator may be expensive, but it drives like a $2,500 fuel-injection unit and makes more power without the complexity of fuel injection. The distributor is usually attached here. However, some carburetors may be fitted with a secondary power valve which can be used if additional fuel is demanded on the secondary side. H25-73 H25-48 Double Pumper Aftermarket 800-850 Butterfly# 180 Pri. The front block # is 6283 with #72 jets and a 8. 043” and intermediate discharge =. Properly Adjust The Idle Mixture On Holley Carburetors">How To Properly Adjust The Idle Mixture On Holley Carburetors. 100% wet-flow tested by Holley technicians to assure it arrives ready to run! Primary Metering Block, 0-80770. Holley Carburetor Numerical Listings Technical Information. Here's a simple trick to make sure the gasket seats squarely between the power valve and the metering block. Both modifications are semi-permanent and time-consuming. Holley performance carburetors are equipped with a fuel bowlthat is designed either for a center pivot or a side pivot float. About Holley Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley Carburetor Numerical Listing. I don't have anything on the other numbers, but I hope what I listed helps. Pic #4 - this hole, circled in yellow, is the vacuum feed to the ported vacuum nipple on the front primary metering block, drivers side, above the idle mixture needle. The conversion kit (foreground) replaces the metering plate like on the 4160-style carb on the left and replaces it with a metering block like the 4150-style carburetor on the right. Holley’s Ultra models have an adjustable idle air bypass screw (yellow arrow). The Holley list #4224 is a unique model carburetor for it is the only or one of few 4160 models with mechanical 1:1 linkage. Check here for specific Muscle car Info: Referenced by ; Holley 4777-2. Secondary Primary Secondary Secondary Throttle Throttle Nozzle Primary Metering Secondary Metering Metering Primary Secondary Body & Venturi Venturi Throttle Bore Bore Size or Bowl Block Bowl Block Plate Fuel Fuel Shaft Diameter Diameter Diameter Diameter Spring Color Gasket†Gasket Gasket†Gasket Gasket Bowl Bowl Assembly Primary Secondary Primary …. Metering Block Kit Secondary Conversion Kit PART #67164C Carburetor Metering Block. Should you need information or parts assistance, please contact our Technical Service Department at 1-866-464-6553, The smaller tube attached to the metering block is timed spark (vacuum. Any dirt that may enter the carburetor can cause the carburetor to flood or malfunction. Holley offers two different metering block conversion kits. The smaller tube attached to the metering block is timed spark (vacuum provided anytime after off idle). I wanted to use the carb on the street in a milder 489 BBC—10:1, 781 heads with big valves, roller 240 @. This restriction can be enlarged by drilling out the holes or reduced by filling them with epoxy and drilling smaller holes. After this has been done, you can begin adjusting all of the idle mixture screws. The layout for HP carburetor metering blocks and Dominator carbs will look slightly different from this standard Holley two-circuit metering block, but most of the circuits are exactly. They are easily identified by pullover tubes that protrude into the venturi near the throttle plate. Instead, carburetor manufacturers upped the ante with new, more refined designs. Also different are the primary boosters, which are annular discharge to reduce emissions. Carburetor Parts and Components. Metering block explanation. Installation is no different than a conventional metering block. Quick Fuel Carburetor Metering Blocks, Replacement. 8896-1 (1050 cfm) intermediate feed =. Metering blocks can be custom built with your specifications or purchased bare for the professional carburetor builder. In the lower plate, it is at the top of the down leg passage (yellow arrow) to the idle mixture adjustment screw. Save your frustration and get the proper ones for that carb. Note it is above the closed throttle blade at idle, so it is not exposed to manifold vacuum, but immediately starts to come into play above idle as throttle is opened. The feed is located on the fuel bowl side of the metering block (location shown above). Holley carburetors feature idle mixture screws which control the air/fuel ratio and these are usually the main culprits in an improperly idling carb. 050" front transfer slot in order to get it to idle. Holley Metering Block/ Fuel Bowl Gasket Pack $16. Metering Blocks and Plates. In the top metering block, the idle jet is at the bottom of the main jet well (red arrow). INSIDE YOUR HOLLEY FUEL INLET SYSTEM …. 850 thick that features an isolated idle circuit, which. redrocket1953 said: I'm having some issues with a 780 Holley and was wondering if the wrong metering blocks are on it. The list # has been ground off. Secondary Primary Secondary Secondary Throttle Throttle Nozzle Primary Metering Secondary Metering Metering Primary Secondary Body & Venturi Venturi Throttle Bore Bore Size or Bowl Block Bowl Block Plate Fuel Fuel Shaft Diameter. Holley offers two different metering block conversion kits. by BLACK BART » Tue Feb 01, 2011 7:58 am. In 4160 fashion its fitted with a Primary metering block that comes with standard #76 main jets and a #12 Secondary metering plate equivalent to #73 jets. All of Holley’s models are rated in cubic feet per minute (cfm) with the smallest four-barrel rated at 390 cfm and ending with the Dominator line of racing carbs that now extends to 1,475 cfm. Will also get a rebuild kit for it. Screws: Fuel Filters Holley Diagrams 4150 4160 2010, 2300, 4010, 4011, 4150, 4160, 4165,. Metering Block Assembly. As well as secondary squirters off the airhorn. An externally adjustable needle and seat assembly is. This AED-modified Holley Dominator may be expensive, but it drives like a $2,500 fuel-injection unit and makes more power without the complexity of fuel injection. If not, the power valve opening can be blocked with this simple block-off plug from Holley (P/N: 26-36). Metering Blocks and Plates Metering Blocks And Plates Availability In Stock Brand Holley Quick Fuel Product Type Idle Mixture Screw Main Jet Tap Tool Metering Block Plug Replacement Metering Block Kit Replacement Metering Plate Items 1 - 27 of 27 Items Sort 1 Metering Blocks And Plates. Turn them slowly clockwise and counter-clockwise until the vacuum gauge reads the highest possible reading you can achieve. Cover 157 Hot Idle Compensator Assembly 158 H. A short discussion on metering block features. There are some tuning features that this block has that are illustrated below. 4555 Jets Needle and Seat (Same procedure for both carbs) Using a wide screwdriver, unscrew and remove the lock screw. Place the carburetor in position over the four stud bolts and secure in place. The Holley list #4224 is a unique model carburetor for it is the only or one of few 4160 models with mechanical 1:1 linkage. Holley Carburetor Numerical Listing">Holley Carburetor Numerical Listing. Quick Fuel 3 circuit block intermediate feed =. Metering Block Plug. My records show the #11166 block to be a primary block for a 4779DP. 147 Secondary Power Valve Assembly 148 Secondary Power Valve Gasket 149 Secondary Metering Body Gasket 150 Secondary Metering Body Assembly 151 Secondary Metering Body Plate 152 Secondary Metering Body Plate Gasket 153 Main Metering Body & Plugs Assembly - Secondary 154 Secondary Metering Body Screw 155 H. Just got a hold of a used Holley 1150 3 circuit, would like to change it over to a 2 circuit. How To Properly Adjust The Idle Mixture On Holley Carburetors. Holley Carburetor Disassembly Guide: Rebuild Step. What makes the Holley 4180 different from its aftermarket 4150/4160/1850 cousins is the tamper-proof metering block that makes it virtually impossible to adjust the idle air mixture. Step 1: Install Power Valve Thread the power valve into the metering block from the rear of the metering block. Using parts from a model appropriate Holley renew kit, install new cork rubber gaskets into the metering block’s idle-mixture-screw. Plastic “T’s” (available through the. I have purchased a set of cast metering blocks that have been modified for adjustable bleeds. Also different are the primary boosters, which are annular discharge to reduce emissions. Metering Blocks. Holley makes several kits—mainly for either the 0-3310 750 cfm or the 0-1850 600-cfm carbs. The smaller tube attached to the metering block is timed spark (vacuum provided any time after off idle). Hold the metering block up, seat the gasket on the power valve's groove, and install it as shown. Holley Parts Page Rebuild kits bowls base plates many parts. A short discussion on metering block features. Make sure that you install the correct style of power-valve gasket based on the design of your power valve. Metering Block Gasket Secondary Metering Plate Gasket Primary Fuel Bowl Secondary Fuel Bowl Throttle Body & Shaft Assembly Venturii Diameter Primary Venturii Diameter Secondary Throttle Bore Diameter Primary Throttle Bore Diameter Secondary R1848-1 4160; 465 37-119: 37-933 6-506: 122-57 N/S: N/S 34R9716-3:. The intermediate system has a feed and discharge restrictions. Holley Carburetor Numerical Listings Technical Information. Accelerator Pumps Nozzles and Booster Parts. Holley Carburetor Disassembly Guide: Rebuild Step …. Carburetor Metering Blocks. Products using this Chevrolet Performance Official Licensed Product emblem are licensed products accepted in the licensing program. Air for the bypass goes through the holes indicated by the blue arrows. The one we'll use for this story is aimed at the 0-3310C but there's also a conversion for the 600-cfm single inlet 0-1850. The #4100 block is a secondary conversion block to convert a model 4160 to a model 4150. The main body part # is 6R3551. Carb Science Series: Holley Power Valves. This means checking all the hoses going to the carb and intake. Intermediate circuit tuning. VERY LIMITED H25-46 H25-73 Double Pumper Aftermarket 650-750 Butterfly# 172 Pri. Metering blocks can be custom built with your specifications or purchased bare for the professional carburetor builder. Part# Description Application Price Order Chokes , Floats , Kits , Rebuilt Carbs , New Carbs Primary Pulloffs , Secondary Pulloffs Main Holley Page Base Plate Holley Brand base plates H25-46 1850 Style Aftermarket. On the left (red arrow) is the fixed type most commonly seen in regular metering blocks. H25-48 80-248 Throttle base plate Screws OE style 80-248 Misc. Converting a Holley 4160 to a Secondary Metering Block. Metering Plates. Front 780 jets are 70 and rear are 76. An exploded diagram of the metering block and idle mixture screws (in red) The first step to getting proper idle is checking for vacuum leaks. Secondary Metering Block, 0-80670. 3 Circuit Billet Metering Block Instructions. This metering block has drilled PVCR holes – in this case for the 750 cfm Holley uses 0. The one we'll use for this story is aimed at the 0-3310C but there's also a conversion for the 600-cfm single inlet 0-1850 carburetors.