Now, more on pump volumes. There are two. When adjusted properly, the diaphragm lever should be able to move enough beyond WOT to accommodate a. Mercury Montclair Holley Model Carburetor 1956, Carburetor Accelerator Pump Cam Kit by AED Performance®. Set your accelerator pump back to the stock middle position. but i cant get rid of this off idle bog. Some 1920 carburetors had a glass float bowl and the glass and zinc float bowls are interchangeable. 2 product ratings - Holley AED QFT CCS 4150 4160 Carburetor Blue Accelerator Pump Cam 41-234 $7. Autolite/Motorcraft. Or not? (or just buy parts, people at Holley got to eat to). Holley Models. I bought the next two sizes up from stock on the discharge nozzles and it worked out that the. Holley carburetor parts including carburetor kits and carburetor parts not usually found in the typical carburetor kit. (2) Clean Carburetor with carburetor -cleaner, spraying down the main throats of the carburetor (with running engine at a fast idle, to prevent stalling). The Spill Jet, Weight, & Ball Valve: Figure 60a shows the details of the Accelerator Pump Circuit. What pump cam chart do you guys go by? The one Holley puts in their book differs quite a bit from some you find on the internet that independent companies/people have came up with. " Think of these parameters like the accelerator pump shot and shooter size part of the tune up. Utilizing this chart will help you determine the. For Carbed engines, you need to up the size of the jets to flow about 20% more for the primary, and 35% more for the secondarys, and tune from there. as its at an odd angle and kinda hidden by the accelerator pump cover. Dodge Truck & SUV forum with the best tech and vehicle help on the web. CUR4MK-16: Pulloffs : Quadrajet Pulloffs Pulloffs by Carb# or Pulloff Rods: Floats. I put the 30cc pump back on and used the black cam in #2 position. Go to Holley sight for accel pump clearance --video clip The holes are for different idle speeds 1 setting around 700 ,, 2 position around the 1000rpm idle Holley accelerator pumps/cams | Grumpys Performance Garage look at the fuel curve charts for the pump cams also. Holley 30cc Accelerator Pump Cam Kit Fits Demon Aed QuickFuel. Decrease the size. setup your power valve, get your primary shot set right (there is a changeable cam on the pump arm) set your jets right and really take the time to tune it properley and itll run well. 99 Trending price is based on prices over last 90 days. Advice on affordable parts? (accel pump squirter tubes, jets, etc. In the days of `57 ford 312’s and `60 Dodge 383’s the purpose was for a summer and winter setting of the accelerator pump. The opposite is also true -- smaller squirters cause the pump shot to be "stretched out" over a longer period of time. Test the pump before putting the top back on. That indicate d none of the cars were properly tuned. 2300/4150/4160 Series Carbs. Accelerator Pump arm adjustment: The accelerator pump arm must not be loose at idle. By Ted - 5 Years Ago: Knowing the list number on the carb will help as Holley made no fewer than two dozen different 600 cfm Holleys and they are all for specific applications. Observe the pump jet in the carburetor, and with your hand, work the carburetor throttle to the wide-open position. The cruise mixture on a low boost, mild cam engine would be 1 to 1. Experiment with different accelerator pump cams and nozzle sizes. Holley Avenger Carburetor Carburetors user reviews : 2. Tailor pump shot to individual engines. 76 gears this is already a 'fun-package'. If the accelerator is not working try to start the engine to pump some fuel into the fuel bowl. The larger 50cc pump is undesirable in all cases with the exception of alcohol carbs and some low rpm four-cylinder engines. The latest performance fuel pump from Walbro. 66-51 idle adjusting screw spring id. 2) Make sure your float bowl level is not too low. Finally, Holley offers an E85 checker to determine the level of ethanol content in the fuel. 1) With the engine shut off, check that your accelerator pump is giving a nice, strong, long squirt of gas down the venturis when you open the throttle by hand. Using the lowest hole increases the amount of fuel pumped. 6) Caused by installer allowing engine to spit-back up through carb. For Carbed engines, you need to up the size of the jets to flow about 20% more for the primary, and 35% more for the secondarys, and tune from there. Jets for the Holley carb are readily available from Holley at most speed shops. The purpose of the pump is to inject fuel into the throat of the HS40 when the throttle is opened. I purchased a larger 40cc accelerator pump squirter and the screw with hole in the middle as holley recommended for any squirter above 39cc. & Screw Mount (1) First, perform the various engine tests & adjustments; Compression, Points, Timing, Vacuum, etc. The lever for the accelerator pump should sit on the cam with no clearance when the throttle is closed, when the throttle is wide open there should be a little room for the lever to move more. Moroso Accelerator Pump Cam Kits 0 out of 5 ( There are no reviews yet. Nozzle sizes are stamped on each shooter (for example, a 31. For a Holley style carb, it sounds like you need a larger accelerator pump squirter and/or different accelerator pump cam. This is info supplied by Holley. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35. Finally, Holley offers an E85 checker to determine the level of ethanol content in the fuel. Accelerator pump cams on Holley carbs can be swapped out to deliver advanced or delayed accelerator pump delivery depending on your engine's normal idle speed. My guess is that I'll probably 11-12 psi? vacuum. Valdez also suggested the stock Holley 50cc accelerator pump is overkill for this application, so they regularly replace it with a stock four-barrel style 30cc pump. Kit includes a helpful tuning chart to assist you in selecting the appropriate accelerator pump cam;. Holley Four Barrel Carburetor List Numbers, Stock Jet Sizes, CFM, and Stock Power Valve Ratings | Ho… The power valve in the carb is stamped with an A2 and a 30, but I thought power valves were 4. For low-RPM wide open throttle you can drill out the pump nozzle (and lower the level pin to compensate). This was a good resource to use for. com/vct/Holley/510/10. This kit allows you to effectivly tune pump volume and fuel delivery rate. This is because the little passage cut in the side of the internal threads may not be big enough when you are way up in shot size, over. Obviously, there is no such thing as an accelerator pump in an advanced EFI system, but there is a set of parameters within the Holley software named "Acceleration Enrichment (AE) vs. My car has a serious bog (almost cuts out) when I get on the accelerator hard off idle and from below 2000 rpms, then it recovers and pulls hard the rest of the way. Shut off the engine. 0 out of 5 stars 1. Edelbrock Performance Carburetors and accessories are made in the USA and are available with a 500-800 CFM rating for AMC, Buick, Chevy, Chrysler, Ford, Oldsmobile, & Pontiac engines. Hold discharge check ball down with a small brass rod and operate pump plunger by hand. I'm going to put it back together and see how it runs from that point. Almost everybody has a Holley carb but not everyone know how to tune them we show you how and help you learn the science and basics of carburetors. weber conversion k245. This product is made of high-quality materials to serve you for years to come. The Ford engineering number, Holley list number, and casting date code can be found on the air horn in front of the choke plate. HOLLEY 4150 4160 Quickfuel AED Carburetor Fuel Line Dual Feed Stainless Braided - $29. Using the lowest hole increases the amount of fuel pumped. Accelerator pump on carburetor is adjusted too aggressively. If a longer duration of accelerator pump shot is needed,. Offenhauser Dual Port 351C-2V Offenhauser Port-O-Sonic 351C-2V (p/n 6122) [DeTomaso] Possible club/list/forum 351C. If you don’t see a nice, long squirt down the venturies, then fix your accelerator pump. Holley also supplies a wide range of accelerator pump cam profiles that allow the pump discharge rate to be tailored to the engine. The holley's a 670 cfm and I am running a 302. Troubleshooting Your Holley Carb August 2, 2017 Wayne Scraba Fuel Delivery , How-To and Tech Tips , News 1 Holley carburetors find their way onto countless vehicles, from race cars to hot rods to delivery trucks, and for good reason: They're the standard of performance, and without question some of the most popular and easily tunable. The secondary spring is the "black" spring. Please call us to discuss your application and it's requirements. all 3 of the 4180s i have floating around were previously tampered with. these installation kits are imported from germany and come as in the photo. I'm going to put it back together and see how it runs from that point. Carbs for a Rover V8. Weber 32/36 Carburetor Adjustment Weber Carburetor Adjustment Procedure. The accelerator pump is linked to the throttle linkage and squirts a small amount of fuel into the engine when the throttle is being pressed and there are 3 things to tune it on the 5200. See application chart below in tech resources for specific details. We gathered information from books, performance industry know-it-alls, and the world wide web and we packaged it up into a great little timeline that starts with the earliest Holley carburetors starting in 1903 and still going strong with great new carburetor designs almost 110 years later in 2012. Different intake and cylinder head combinations may require more or less pump shot. The bog with lack of accelerator pump should kill the engine. How to Replace Your Car's Mechanical Fuel Pump. Google holley pump cam chart in images to see the differences between the pump cams. The cruise mixture on a low boost, mild cam engine would be 1 to 1. The nozzle hole size determines the rate of fuel discharge. I put the 30cc pump back on and used the black cam in #2 position. AED HOLLEY ACCELERATOR PUMP CAM ASSORTMENT 5560 AED Performance pump cam kit offers a wide selection for tuning the accelerator pump circuit. Obviously, there is no such thing as an accelerator pump in an advanced EFI system, but there is a set of parameters within the Holley software named "Acceleration Enrichment (AE) vs. Continues to flow high volume even at 120 PSI. With the vacuum-secondaries, diaphragm springs are used to control opening speeds. Utilizing this chart will help you determine the. Accelerator pump cams come in various sizes and are color coded and number coded by Holley. 99 Trending price is based on prices over last 90 days. Engine Articles and Videos. The holley's a 670 cfm and I am running a 302. -green accelerator pump cam-. Holley Carburetor Numerical Listings Carb. The brown is a 50cc pump cam; the chart is for the 30cc pump cams. Hey Veepster. 035" Accelerator Shooters (Secondary) Red cams #1 hole in #1 position : Manifold:. If you're up at 40 with a typical orange pump cam and it's still stumbling I'd first check your accelerator pump linkage adjustment. Start changing parts from that point. Has pink pump cams front and rear and both were in position 1. In addition, most have a three position lever which can be used for tuning. Model: CFM: PrimaryMainJet: SecondaryMain Jet. Do your accel pump cam charts show relation to throttle position? The one in the HP Books (also a good Holley Book) only has the total output of each cam. The accelerator pump system consists of a diaphragm pump that is actuated through a lever and cam on the primary throttle shaft. 9% of the time, a hesitation when you floor it means it is not getting enough gas. Start the engine, and warm to normal operating temperature. Does the chart go with what I've read and I'm just not seeing it?What I read at the Holley site said the cams go from light to heavy in this order:. Includes 8 cams for 4150 four barrels and 2300 two barrels with 2 screws. Pump Cam Profile by Color Thank you for purchasing the QFT Accelerator Pump Cam Assortment. 1963-67 ENGINE ASSEMBLY & COMPONENTS: AIR CLEANERS, ALTERNATORS, BLOCKS, CARBURETORS, DISTRIBUTORS, EXHAUST MANIFOLDS, FUEL PUMPS, HEADS, IGNITION SHIELDING, INTAKE MANIFOLDS, STARTERS, VALVE COVERS, WATER PUMPS & MORE Fuel System - Carburetors, Tags & Parts, Fuel Pumps, Fuel Lines & Linkage Fuel System: Carburetor - Holley 2 Barrel Component Parts / 3X2 - TRI POWER. The carburetor is equipped with a green accelerator pump cam, which is designed to give a very fast delivery of accelerator pump fuel and empties the pump cavity quickly. There are two. Accelerator Pump arm adjustment: The accelerator pump arm must not be loose at idle. The Ford Cologne 2. Orange has worked well for me in many situations. By changing the size and shape of the arc on the cam, the pump shot can be tailored to start early or later as you go from off idle to full throttle. Marine Rochester. I have always used the regular "straight" discharge nozzles, but was thinking of using the "tube" type this time around, mainly due to the claims of better fuel atomization. 100) main jets, 1451 (070 x 047) metering rods, and orange springs. Get Yours Today! We know our parts and products. A recent teardown has exposed a wear area where the arm contacts the pump cam. I've noticed a lot of questions lately about pump cams on Holley carbs. In addition, most have a three position lever which can be used for tuning. The system also uses various springs, cams, and diaphragm sizes to control the amount of fuel injected by virtue of the duration of the injection phase. 10% higher volume and pressure than the Walbro 460 pump. Crane Engine Parts March Billet Pulleys Engine Parts Comp Cams Engine Parts Valve Lash Adjustment Chart Decal Top Dead Center Holley Accelerator Pump Nozzles. The Most Trusted Name in Carburetors Since 1954. , the back gets less idle flow. 49 Trending at $7. This runs from the accelerator pump down to a cam which is attached to the throttle shaft on the. 035" was the one that worked. The table below is the list of, manufacturer specific "P" codes available for Peugeot / Citroen. This accelerator pump has a stronger duration spring that allows the pump to be more active and thus help cure most of the accelerator pump related hesitation we see with these carburetors. Hey Veepster. The same applies to the accelerator pump cams. The following is a partial list of Holley list numbers for some of their most popular carburetors. Holley Four Barrel Carburetor List Numbers, Stock Jet Sizes, CFM, and Stock Power Valve Ratings | Ho… The power valve in the carb is stamped with an A2 and a 30, but I thought power valves were 4. Holley Carb Accelerator Pump Squirters Nozzles Cams Adjustment Tutorial Overview http://www. Clevelands respond well to large accelerator pump shots, and crisp jetting. The Most Trusted Name in Carburetors Since 1954. Moroso Accelerator Pump Cam Kits 0 out of 5 ( There are no reviews yet. it is not a complete list of all carbs made by holley over the years. C1 & C2 Corvettes - Confusion in Tuning the Holley Accelerator Pump Cam - When you look through Holley literature and videos regarding tuning the accelerator (squirter) pump cam, most say to use Position 1 (smaller squirt later) for heavy cars and Position 2 (bigger squirt earlier) for a light car. General AFR Guidance (Holley Tuning) chart available that shows the difference in accelerator pump cams? I found a few online, but they all seem different. Even with 4. If holes 2 or 3 are used, the motion is retarded (moved to the right on the graph by about 5 to 8 degrees). This kit includes 8 camshafts. Accelerator pump cams on Holley carbs can be swapped out to deliver advanced or delayed accelerator pump delivery depending on your engine's normal idle speed. Re: Holley accelerator cam and nozzle questions May 30th, 2013, 11:49 AM I had a 4v cleveland on the street with a stock iron intake and a number of different carbs, it wasn't a big cam by todays standards, flat tappet hydraulic street / strip grind - didn't require any exotic valve train hardware - stock rockers, etc. My car has a serious bog (almost cuts out) when I get on the accelerator hard off idle and from below 2000 rpms, then it recovers and pulls hard the rest of the way. Then you need to put in a bigger cam. Each camshaft has a different shape or profile to give different results and the camshaft lift directly affects the accelerator pump stroke and pump capacity. Tailor pump shot to individual engines. Depending on advice and feedback, my next step is to try some more accelerator cams,, and then go to a 50cc accelerator pump. Possibly damaged by a backfire condition. BUT if you want/need to tune the nozzles, or the air bleeds, you have to purchase their kit (air bleeds $35, nozzles $55, iirc), and the kits are. I'll get some 31 tube squirters and an jet assortment. it is not a complete list of all carbs made by holley over the years. Accelerator pump cams come in various sizes and are color coded and number coded by Holley. What is the accelerator pump size on your carb? You need to know that really to make sure you have the right pump cam. Holley Carb Accelerator Pump Squirters Nozzles Cams Adjustment Tutorial Overview http://www. Has pink pump cams front and rear and both were in position 1. This accelerator pump cam assortment will allow you to "tailor" and fine tune your carburetor for your engine's actual requirements. Jets for the Holley carb are readily available from Holley at most speed shops. accelerator pump cam : black accelerator pump cam: pink While the drivability-enhancements covered in this article apply to Holley Double-Pumpers on a wide variety of engines, it is important to remember that your final carburetor calibration and results will likely differ from what you've read in this story. Each cam has a different shape or profile to give. Moving to the metering block, JET will evaluate the engine size, breathing capacity, compression, and cam timing variables and recommend changes to both the emulsion circuits and. I'll take a reading as soon as I get the cam broken in. Bob, For your altitude, and 60 deg F, the H & H pocket dyno shows 68 Front jets on a 750 and 74 on a 780. This accelerator pump cam assortment kit allows you to tailor accelerator pump performance to the engine's actual requirements. Each camshaft has a different shape or profile to give different results and the camshaft lift directly affects the accelerator pump stroke and pump capacity. This tube sits in the main well and mixes the fuel with air from the air-bleed and adjacent air channel that eventually finds its way to the venturi booster. With the suction thus balanced, the diaphragms close the fuel inlet valves ending all fuel flow. The next trick is to replace the accelerator pump cam. Dodge Truck & SUV forum with the best tech and vehicle help on the web. Attach a wire around it and hold it down to catch the gas as it squirts out of the accelerator pump jet. A good selection of pump discharge nozzle sizes is indispensable to the proper tuning of the accelerator pump system. Holley 1850 rebuild Tips and Tricks. Alternatively Gary Sypherd reports that an easy way to seal the accelerator pump is the Edelbrock Marine Accelerator Pump Kit part #1471. Technical Q&A. I have a feeling I'll need to upgrade to the 50cc accelerator pump to help the stumble off the bottom end. There's pretty much NO documentation that I've ever found that specifies what the differences between them are. Re: Holley accelerator cam and nozzle questions May 30th, 2013, 11:49 AM I had a 4v cleveland on the street with a stock iron intake and a number of different carbs, it wasn't a big cam by todays standards, flat tappet hydraulic street / strip grind - didn't require any exotic valve train hardware - stock rockers, etc. is there any way to get a larger accelerator pump capacity displacement ? holley carbs have larger capacity bolt on accelerator reserviors 50cc and multiple accelerator pump cam options !!! i am wondering. Accelerator pump shot relative to cam color from lightest to heaviest are as follows: Black, Pink, White, Red, Green, Orange, Blue, Brown, Yellow Holley® has. HOLLEY 4150 4160 Quickfuel AED Carburetor Fuel Line Dual Feed Stainless Braided - $29. NAPA is your trusted source for automotive parts, accessories & know how for your car, truck or SUV. com and 37 squirter,played with accelerator pump cam. Autolite/Motorcraft 2100 Series Carburetor Parts Autolite/Motorcraft 4300 Series Carburetor Parts Carter YF Series Carburetor Parts Holley 1904 Series Carburetor Parts Holley 1940 Series Carburetor Parts Carburetor Spacers Carburetor/Manifold to Spacer Gaskets Distributor Vacuum Advances Choke Tube Kits Choke Cables Choke Thermostat Shields. First, the basics: aggressive 340 with 360 ported/polished heads and a border-line race cam (12# Hg @ idle) and 750cfm holley with vacuum secondaries currently running the medium (plain) spring. Holley carburetor accelerator pumps further holley carburetors accelerator pump lever holley carburetor accelerator pump adjustment holley carburetor adj holley carb. Do your accel pump cam charts show relation to throttle position? The one in the HP Books (also a good Holley Book) only has the total output of each cam. Carb Sizing. The 650s if I recall usually have a 20-30cc pump, so you need the 20-30cc pump cams. We have parts for most 1, 2 & 4 barrel carburetors, including a 1 barrel universal replacement carburetor. A holley will do the same thing, maybe a minor tweak on the accel pump shooters or cam, or vacuum pod spring, but in general minor tweaking. " Carb Sizing A quick Google search will find several formulas that recommend a specific carb size based on factors such as engine displacement and rpm range. ACCELERATOR PUMP Mikuni’s HS40 carburetor is fitted with an accelera-tor pump. Be sure to buy the proper jets for an Autolite/Motorcraft carburetor because an aftermarket Holley jet does not have the same threads. The metering block contains the main metering jet and accelerator pump check valves. Re: Holley accelerator cam and nozzle questions May 28th, 2013, 04:53 PM I put 2 little washers on the adjustment bolt of my 670 right under the hole from the arm, it seems to make the contact with the pump arm better,more exact since its kinda sloppy,I used the green pump cam in the #1 hole and a 31 squirter ,works good now. You can find all the Holley technical videos, as well as some pretty fun videos of Holley events, dyno runs and interviews, at HolleyTV. The opposite is also true -- smaller squirters cause the pump shot to be "stretched out" over a longer period of time. This product is made of high-quality materials to serve you for years to come. Holley makes a pump cam kit, with a variety of color-coded cams for different pump shot curves and amounts. Re: Holley accelerator cam and nozzle questions May 30th, 2013, 11:49 AM I had a 4v cleveland on the street with a stock iron intake and a number of different carbs, it wasn't a big cam by todays standards, flat tappet hydraulic street / strip grind - didn't require any exotic valve train hardware - stock rockers, etc. The purpose of the pump is to inject fuel into the throat of the HS40 when the throttle is opened. The frustrating part about the Holley accelerator pump is the cams. It sometimes is overlooked when replacing parts. setup your power valve, get your primary shot set right (there is a changeable cam on the pump arm) set your jets right and really take the time to tune it properley and itll run well. A mechanical secondary carb uses mechanical linkage to open the secondary butterflies and most also have dual accelerator pumps (a. To assure proper operation of the accelerator pump, make sure that the pump arm is properly set up against the pump arm screw (spring loaded screw on the lever). The two generations of carbs - Before 1989, virtually all pwc's utilized the "round pump" Mikuni carbs. I hooked up a dial indicator and degree wheel to a throttle body and measured all the cams myself. When properly installed, the link will resemble the letter "S" if viewed from the front, NOT a reverse "S". Using the lowest hole increases the amount of fuel pumped. “This helps the racer stay consistent at the track,” says Tichenor. Obviously, there is no such thing as an accelerator pump in an advanced EFI system, but there is a set of parameters within the Holley software named "Acceleration Enrichment (AE) vs. A good selection of pump discharge nozzle sizes is indispensable to the proper tuning of the accelerator pump system. I purchased a larger 40cc accelerator pump squirter and the screw with hole in the middle as holley recommended for any squirter above 39cc. Alternatively Gary Sypherd reports that an easy way to seal the accelerator pump is the Edelbrock Marine Accelerator Pump Kit part #1471. AFTER getting your shooter size roughed in,you will want to try changing to the #1 hole before deciding to go with another cam. I understand that this carb may be a bit big, but it was. Holley QFT AED CCS Complete 30cc Accelerator Pump. How did you set your float?. This accelerator pump cam assortment kit allows you to tailor accelerator pump performance to the engine's actual requirements. I have a feeling I'll need to upgrade to the 50cc accelerator pump to help the stumble off the bottom end. There is a open plenum that is shared by more than one cylinder under the carb. 0 out of 5 stars 1. Volumetric efficiency, gear ratio, compression ratio, valve size and lift, weight of car, convertor stall and other factors may vary the carburetor sizing so before you make your selection always contact us for and speak to a reliable carburetor professional who is familiar with Quick Fuel air flows and the various types and series of. The total lift of the pump cam is what determines the amount of fuel dispensed in one stroke of the pump. Carburetor component parts are also available, accelerator pumps, floats, jets, power valves, gaskets and more. Holley Accelerator pump cam color survey. The 650s if I recall usually have a 20-30cc pump, so you need the 20-30cc pump cams. BUT if you want/need to tune the nozzles, or the air bleeds, you have to purchase their kit (air bleeds $35, nozzles $55, iirc), and the kits are. They are available in a kit, part number 20-12 pictured below. Model: CFM: PrimaryMainJet: SecondaryMain Jet. Browse carburetor components and replacement parts here at Day Motor Sports. com carries a great selection of replacement accelerator pump diaphragms, accelerator pump kits, accelerator pump arms, accelerator pump diaphragm spring kits and more that fit Holley and similar carburetors. (this may be his problem) That sets the carb up to a basic tune. I do not think the test has a whole lot of validity. Using a small pin punch or a finish nail, carefully knock out the roll pin securing the accelerator pump arm to the top of the carb. In any given cam there can be multiple mount holes to give a little more adjustability as to when and how much fuel will flow. Including the graph on Holleys own website and in their catalog This one seem accurate and in accordance to my personal measurements and experiments. A holley will do the same thing, maybe a minor tweak on the accel pump shooters or cam, or vacuum pod spring, but in general minor tweaking. Each camshaft has a different shape or profile to give different results and the camshaft lift directly affects the accelerator pump stroke and pump capacity. How to Replace Your Car's Mechanical Fuel Pump. Custom tailor accelerator pump timing to your specific engine needs. The brown is a 50cc pump cam; the chart is for the 30cc pump cams. 035" Accelerator Shooters (Secondary) Red cams #1 hole in #1 position : Manifold:. Motorcraft 2100 Carburetor. If you decide to go with the Holley, shoot me your engine specs and I'll send you the jet, nozzle, accelerator pump numbers that will get you real close and save you a bunch of R&D time and money. Google holley pump cam chart in images to see the differences between the pump cams. In fact I'm not sure they came with the cam kits. ACFI is happy to provide the specs many of you have asked for all compiled into 1 place. The other thing to take into account is the profile of the cam. I have plenty of different color cams but no chart. But like any of your car's components, mechanical parts can wear down or break. holley 4 barrel carb list numbers and stock jetting. Install the accelerator pump discharge check ball into the discharge passage. Holley Truck Avenger Carburetor yes/no ? Last week I had a friend in my workshop. The next trick is to replace the accelerator pump cam. A one stop shop for all your engine rebuilding, customizing and racing needs from safety equipment to timing and set up gear. Clevelands respond well to large accelerator pump shots, and crisp jetting. Pump cam charts The following chart is from Jason Kolk, as posted at vintage-mustang. Dodge Truck & SUV forum with the best tech and vehicle help on the web. Re: Holley accelerator cam and nozzle questions May 28th, 2013, 04:53 PM I put 2 little washers on the adjustment bolt of my 670 right under the hole from the arm, it seems to make the contact with the pump arm better,more exact since its kinda sloppy,I used the green pump cam in the #1 hole and a 31 squirter ,works good now. 1) With the engine shut off, check that your accelerator pump is giving a nice, strong, long squirt of gas down the venturis when you open the throttle by hand. The Renew Kit is the 37-1536 (Holley official rebuild kit; it covers this & similar carbs) The Trick Kit is the 37-933 (contains most everything to rebuild the carb, plus some extra power valves, nozzles, pump cams, etc. The accelerator pump arm and spring are stock, and the accelerator pump cam is the pink one. Holley's first version was the Holley 5200, fitted to the 2-liter German Ford OHC ("Cologne") engine in the 1971 Ford Pinto. Below is pic of Holley pump cams, and how they deliver fuel based on throttle positions. QuadrajetParts. The cams have different shaped ramps that the arm from the accelerator pump rides on. Try different shooters and cams until you reach the fastest 60ft time. Holley QFT AED CCS Complete 30cc Accelerator Pump. Carburetor Part No. _____ Let's use my favorite, a 750 Race Demon with 4-corner idle and full mechanical linkage as an example here. The secondary spring is the "black" spring. Order Holley Carburetor Parts & Components for your vehicle and pick it up in store—make your purchase, find a store near you, and get directions. Using a small pin punch or a finish nail, carefully knock out the roll pin securing the accelerator pump arm to the top of the carb. DCOE Accelerator Pump Jets and Washer. Be sure to buy the proper jets for an Autolite/Motorcraft carburetor because an aftermarket Holley jet does not have the same threads. Get Yours Today! We know our parts and products. The Renew Kit is the 37-1536 (Holley official rebuild kit; it covers this & similar carbs) The Trick Kit is the 37-933 (contains most everything to rebuild the carb, plus some extra power valves, nozzles, pump cams, etc. If you order a set, they may come to you in the ballpark, but every engine is different, even two engines built with the same parts. We also noted in each of the install videos we reviewed, the "post conversion" HP and Torque rose dramatically. Holley 20-81 Yellow Accelerator Pump Cam. I have some accelerator pump cams already. These color-coded springs are also available from speed shops (along with various sizes of accelerator pump nozzles). If a longer duration of accelerator pump shot is needed,. Volumetric efficiency, gear ratio, compression ratio, valve size and lift, weight of car, convertor stall and other factors may vary the carburetor sizing so before you make your selection always contact us for and speak to a reliable carburetor professional who is familiar with Quick Fuel air flows and the various types and series of. I will try to locate the book or paper that came with this carb, but maybe lost as I put this thing on about 3 years ago and kind of just lived with the problem since I didn't drive it too much. Utilizing this chart will help you determine the. Holley QFT AED CCS Complete 30cc Accelerator Pump. This product is made of high-quality materials to serve you for years to come. As the engine spins, fuel pressure is provided and vacuum is created. What I don't like about the Summit Carburetor: They advertise it as fully tunable, with changeable air bleeds, pump nozzle restrictions, Holley acc. A classic example of the leaky lead plugs is a very hard start after the vehicle sits overnight. The HD part numbers listed are correct. Advice on affordable parts? (accel pump squirter tubes, jets, etc. pump cams, Holley jets, and Holley power valves. Based on those posts it would seem that a lot of the Holley 2300 2bbl marine carbs seem to have the 50cc pump installed. Something along the lines of what is on Holley's site, but one that is accurate and not full of errors lol. Accelerator pump cams on Holley carbs can be swapped out to deliver advanced or delayed accelerator pump delivery depending on your engine's normal idle speed. I also noticed that the accelerator pump link is in the middle slot on my Carb which I understand is for manual transmissions? It needs to go in the top slot for the Auto? I was just about to post about a good site that I found that has a ton of info on all sorts of carburetors, including the Holley and Carter for the Dodge/Chryslers:. Go to Holley sight for accel pump clearance --video clip The holes are for different idle speeds 1 setting around 700 ,, 2 position around the 1000rpm idle Holley accelerator pumps/cams | Grumpys Performance Garage look at the fuel curve charts for the pump cams also. Accelerator pump shot relative to cam color from lightest to heaviest are as follows: Black, Pink, White, Red, Green, Orange, Blue, Brown, Yellow Holley® has. Rochester Quadrajet. Holley 750 Vac Secondary Accelerator pump Cam Hi Everyone Playing around trying to tune up my carb and I noticed the accelerator pump spring is pushing down a fair bit on the diaphram actuator. By yknot - 5 Years Ago: What is the best jet size for a stock 292 with a 600 cfm Holey. The fuel pump bolt torque specification is usually around 25 to 35 foot-pounds. I think the circuit also suffers from drain back. A larger hole will "shoot" the fuel at a faster rate with less pressure than a smaller hole. With the suction thus balanced, the diaphragms close the fuel inlet valves ending all fuel flow. Accelerator pumps appear to be working fine, so I'm assuming this may be a power valve problem? Timing is at 6 to 8. 038 wire dia.