Edelbrock Carb Bogs On Acceleration



I installed a carter AVS carb from a 440 mo par. 00 for the carb and getting in on the engine. The idle transfer slots can certainly be a major issue, but there are 100000s cars running a Holley on a Edelbrock manifold, an Edelbrock carb is really a Carter, there would be more Holley's on Edelbrock then Edelbrock on Edelbrock, a common issue is using the wrong gasket under the carb with a factory ford spacer. Also print out the page for the 1409 carburetor. A bog indicates lazy fuel but not lean. Edelbrock had me change the nozzles but as far as I can tell, fuel only comes out of those when the accelerator pump is being used so that was a waste of $30. If I have to wait and the idle drops, it hesitates and bogs hard before actually going. Cost me $40 still sealed in the plastic. Here are my specs: 289 (stock), torker 2 intake, holley 4160 600 cfm vac secondaries, headers, T5, 3. When accelerating normally it drives fine, but when you need to accelerate aggressively it stalls, hesitates. This helps keep the fuel in the carb from getting hot which helps stop any potential for vapor lock. (rochester quadrajet) The choke thing on the holley has an air port, and my old carb has an electric wire connecting the choke. I found the Edelbrock was very adjustable jet-wise - I doubt that any carburetor is going to give perfect results with every engine out of the box. Ive just moved it from my 3. Cheers, Bob. com The intake is Edelbrock for a carb with an adapter form a 454 TBI engine. As the air horn hole is smaller on your OEM AFB than the Edelbrock, you can search for a Chrysler 4bbl air cleaner (1968 and up) at swap meets or get the Mopar Perf "1968 Road Runner style" open element air cleaner for a factory performance look. He is NOT a fan of the Edelbrock 1409 and won t order them, so that s not an option. My timing is set at 12 degrees, starts fine. In the illustration A indicates a bleed which prevents a rich condition and bog when the high speed circuit is reinitiated after deceleration. With several features not seen before, the new carburetor was a hot commodity for the mild street-performance vehicle. 2017 Ford Motorcraft 4 Bbl Carburetor Price List. She stumbles and hesitates under normal acceleration. If by "chokes up" you mean "backfires", this sounds like a lean condition upon acceleration. The average quantity should be 1. {Your carb may just need some cleaning. Find the adjustment screws on the front of the carburetor. Whether you need to replace an aging inchstocker inch or are looking for a performance carb to top your inchhot rod inch, the Edelbrock Performer Series carbs are the best choice for performance and value. I have messed with timing and checked for vacuum leaks and cant find anything so I decided to turn to the most trusted people on the internet you guys. Could this possibly resolve my bogging down as well?. Have a 1970's vintage crate motor (350/290HP) with headers & an Edelbrock 600 CFM carb (1406). Car starts on a dime and drives great for about 10 mins just all of a sudden just bogs down and idles really low then finally stalls. It will give you everything you need to properly set up the carb. Timing is retarded to get the pinging out. On this page you will find the carburettor rebuild kits for the Talbot Samba series that we can supply. Edelbrock has a carb manual on there website. 5 psi for proper operation. I've found the blue doesn't fit close enough in some of the pump wells. Assuming everything else is good on the carb. 11 gears, NX Twin 150 Shot, 11. 060 - flat top eyebrow pistons -30-30 cam 194 double hump heads -Z28 aluminum high rise intake and dual rams horns exhaust and quiet mufflers. The Edelbrock was a 1405, stock right out of the box. I'm thinking I need to go one(two?) step leaner on the metering rods in the Edelbrock 1406 to fix the bogging down. 1969 Camaro? That symptom to me sounds like a carb problem. First a couple of things that are seldom mentioned but are useful to know. Oversize carbs (especially vacuum / air secondary type) will have an untunable low end bog, lazy acceleration and nearly impossible idle problems. Your jetting and rods are what is stock according to the manual. It bogs down past 3/4 throttle. This carb is a 4160 series carb so it doesn’t quite have as many tunable features of a 4150 series carb, however the extra tune-ability is likely unnecessary for an off-road application. Please confirm you have a bog and not a distinct audible pop. I've noticed that on single plane intakes, these carbs really respond to a 2" four-holed spacer, which increase the vacuum-signal to the carb. I have an 86 K5 Blazer, with a 454. The original Edelbrock carburetor design is still available and offers affordable performance for hundreds of applications. New edelbrock carb bogs & surges at wot If this is your first visit, be sure to check out the FAQ by clicking the link above. A carburetor will have an air screw or a fuel screw, one or the other but never both. Do a search for "Ford fuel pump" and you will find lots to read, including the tech bulletin # from Ford that tells you which pump and wiring harness you need. the issue i am having is i have a 1968 charger with a 383 engine stroked to 500 cu in. Changed the 1/2" lines after the pump back to 3/8" as the pump only has a 3/8" outlet & thought there may be too much volume in the bigger pipe. carburetor (Figure 7). 81 corvette that I have had for some time. One of the most common symptoms that the accelerator pump is having a problem is rough or sluggish acceleration. Start at 4:51 if your in a hurry for a solution. Carburetor problems generally fall into three areas: too lean a mixture, too rich a mixture, or an incorrect adjustment. On the other hand, a carburettor that is too small will give better acceleration times, but power may fall off at higher RPM. Zebra F301 BP. A carburetor that uses metering rods in the primary jets such as a Quadrajet or Carter AFB (sold today by Edelbrock today as the Performer and Thunder Series) will use the metering rods to change the air/fuel ratio for both the power and cruise mixture demands of the engine; the larger the metering rod diameter the leaner the air/fuel mixture. Allowing the power stage to come in much sooner. So I've been a fan of the Carter AFB Edelbrock carb on my street cars for many years. Sure you can put a clear secondary spring in and make the thing bog without proper tuning. An Inside Look at the New Edelbrock AVS2 Carburetor. Too small of an accelerator pump in carb(s). To narrow it down, tap the roll pin out of the accelerator pump lever by using a small pin punch or a small finish nail. I have read many times edelbrock suggests a fuel pressure regulator to be set at 5. {Your carb may just need some cleaning. Close scrutiny of the firing end can also suggest a variety of possible engine conditions and point the way to achieving improved spark plug and engine performance. (The fun part!) Decrease the wrap (loosen) until a loss of performance is noted by bog. i Was wandering what jet sizes and springs i should run on it? I have used holleys on all my cars before but never a edelbrock. When i was driving it home it was driving fine for Aprox 20 minutes then it started to bog and sputter. Do not use the carb throat vac port as recommended in the carb kit instructions. That sound right? Any other pointers. it's also possible that the check valve in the accelerator. Have a 98 suburban with a new/old school 400 small block. As the air is pulled into the carburetor venturi, a tube with a constriction; used to control fluid flow (as in the air inlet of a carburetor) it has to accelerate from a standstill, and the acceleration is regulated by the speed of your engine and the position of the throttle blades in the carburetor. Carburetor Spacers Carburetors spacers can be a very useful tuning aid when working on your streetcar, or racecar. If this were a Holley you’d be completely disassembling the carb just to change the power valve. Usually it is a plugged up fi lter. The J-style vent tubes direct fuel/fumes back into the carburetor for safe operation while on rough waters. Some times are worse than others. To TEACH the ECM, drive the vehicle at operating temperature with moderate acceleration and idle conditions. Listen closely to what it sounds like. If you mean it "bogs", then that is quite possibly due to the carb being of such a large CFM. i have a question about a 1813 thunder series avs carb i purchased in 2007. Make sure the initial timing is sufficiently advanced and the total isn't too large. TQ was great all around, but it was already dialed into the first car I bought so I couldnt tell you how to tune it other than the stuff you read here. Best thing you can do is print out the carb tuning section of the Edelbrock carb manual. Has 350 with Edelbrock Carb. You must look for what is amiss on yours. 81 corvette that I have had for some time. Hope you will enjoy our guide and it will solve your problems. If I get it the tires will spin. com Forum > Mopar Garage > Engine, Transmission, Rearend, & Exhaust (Moderators: Chryco Psycho, hemigeno, firefighter3931, Charger-Bodie) > Engine Bogs and Misses Under Hard or Mild Acceleration. I will be driving down the road30-40 mph and when I go to accelerate the engine bogs down and almost stalls. Find the adjustment screws on the front of the carburetor. First off the carb kit price is over $100. Given the choice between an aftermarket overdrive, PowerGlide, or a TH700R4 I would take the latter with a twist. Attacked the rich idle issue by pulling the carb off and checking the idle slots. the engine is pretty much a stock 300 HP vette engine. If you are experiencing hesitation during acceleration (not related to calibration or tuning) and planning on rebuilding your carb, this assembly should be replaced during the rebuild. Pinging gone, timing is now set to factory spec of 10 BTC. If the system is having a hesitation or bogging issue, and you IAC steps are between 3-10 at warm idle, then your next step would be to adjust the accel pump function to increase or decrease the fuel added on acceleration. One carburetor only needs one nozzle. Then I bought a Step-Up spring kit (Edelbrock #1464 about $6). 02 summit heads, timing chain, edelbrock performer mani & used quadrajet which appears to be in good shape but I am now wondering. Picked up an 86 a couple months ago and got to work on it, usual things done, plugs, wires, rotor. with the electric choke set up. The Carter AVS almost perfectly hit the peak muscle car years, appearing atop Chrysler engines from 1968 to 1971. The symptoms he described to me exactly fit what my car has been doing, hard to start and keep going when cold, and then once it is warm, a hesitation, almost bogging out on acceleration from a stop. 1) Inspect choke adjustment and for something binding. He s suspicious of the metering rods, as we re getting this bog from cruise rpm through acceleration. You’d want to rule out vacuum leaks, ignition timing , and accel pump linkage as a cause first. Occasionally, the carburetor's idle jet will become clogged with dirt, which will cause the hesitation or stall. i Was wandering what jet sizes and springs i should run on it? I have used holleys on all my cars before but never a edelbrock. Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. ) are good, pull the top of the carb off and remove the primary venturis and make sure that there is not a piece of dirt in the down tubes. I took the car over to my mechanic, and he took a look at it. DodgeCharger. I am no rookie to edelbrock carbs but Ive never dealt with the avs before. How to Tune Edelbrock Carburetor Carb Idle Mixture Screws Choke Metering Rods Jets Fuel Air Vacuum - Duration: 8:02. The problem I am having is that when I accelerate the car takes off very well and then when the secondaries are opening it bogs down sputters and then launches again and continues to accelerate very strong. Doug Eichner Signature Series Edelbrock Honda ATV Carburetors: Doug Eichner - 5 time Pont de Voux World Champion Paris, France, 3 Time GNC Open Pro Champion, 2001 White Brothers 4-stroke World Champion, Multiple Best in the Desert Open Pro ATV wins - has teamed up with Edelbrock to produce a serious race carb. An Inside Look at the New Edelbrock AVS2 Carburetor. Oversize carbs (especially vacuum / air secondary type) will have an untunable low end bog, lazy acceleration and nearly impossible idle problems. I have an Edelbrock 600 and if my car sits unused for several months it will bog and sputter like crazy, when I pull the top off the carb I find some buildup of crud in the bowls so I clean it out along with the jets and accelerator pump nozzles then it runs great again!!!} Brand new reman carb. not that this really has anything to do with a ford, or even a carb, but my mom's '89 acclaim does something similar. Once i do get it started, it runs OK but if i stomp on the gas, it bogs/hesitates/loads up around 1000 RPM, sometimes makes a loud POP sound (I presume a backfire), and either dies or gets up through the bad spot and runs great at 2000-4000 RPM. The carburetor's job is to create the ideal fuel mix for your motor and supply your vehicle with the proper amount of fuel. Take the carburetor cleaner and spray it where the intake manifold is attached to the engine. Just wondering if anybody has had any luck tuning the Edelbrock AVS for hard turns. To me, every carb is good, you just have to know what your doing and have the right setup. My 04 Raptor 660 bogs down and really won’t go over 10 mph I think it could be carbs there is two carbs on it does anyone know how to fix the bog down sputter and backfire problem. It has a set of edelbrock performer series heads on it and A. The last carb they did for me is on a 79 C30 dually with a 454 and has 4:10 gears - it gets 12 mpg with a TH400 and tows like crazy. Have a 1970's vintage crate motor (350/290HP) with headers & an Edelbrock 600 CFM carb (1406). Features of Holley’s Carburetor Installation and Tuning DVD: High quality professionally produced visual learning aide allows users to “see” how to install & tune a Holley carburetor. The Metering Rods and step-up springs are part of the Primary Main System while the accelerator pump and nozzles are part of the Transition System! The two systems can work together, but you have to tune them separately. Never overheats. I was always told a large carb would kill throttle response and bog under hard acceleration. Pull the top off & have a look at the cup in the bore, it should be near onto snug, but smooth up & down. Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor, By Properly Adjusting The Accelerator Pump Assembly If your car or truck is equipped with a Holley four barrel carburetor and stumbles upon acceleration, more than likely the carburetor needs an adjustment to the accelerator pump assembly. Like mentioned above, the engines are designed to have made all their power by 4500 - 5000 rpm. now the car starts easily, but won't idle. Idles well accelerates well. Edelbrock specify RTV for the end seals instead of rubber or cork (which is a nightmare of stickyness), but after a bit of hassle I got it on. Only that you haven't properly tailored the fuel curve to match the airflow. When I push the gas while it is in park, the RPMs increase like normal with no hesitation. Manifold is a Perfomer Edelbrock aluminum dual plane. Section two is a parts diagram of Carter/Edelbrock 4 -barrel carbs. I suppose some of this could be from the backfiring. _____ You'll need a vacuum gauge, not a good one, I got mine at Baxter's here in town for $9. The carb has never been touched in 17 years but only 200 hrs. 351c engine with approximately 1,000 miles. Narrowing down the cause of engine bog and dead spots in the rpm range - Hot Rod Magazine. Long story short I looked up tables when this little carb would become a restriction on a stock 440. It runs fine other than that. The truck runs fine, as long as you are easy on the gas pedel, but if I stomp the pedal, the engine starts to go and then dies almost as if I flooded it. I have messed with timing and checked for vacuum leaks and cant find anything so I decided to turn to the most trusted people on the internet you guys. If the carb is set up for lean cruise, it's not unusual to have some popping during compression braking. It has CARB exemption so it is 50-state emissions legal. I chose to replace the existing 1967-1970 Rochester Q-jet on my stock 1967 intake manifold. Mainly, I just want to know what the two screws on the front of the carb do and how to make the carb run, or at least idle, with a leaner mixture. 0 V6 OHV equipped Ranger for 10 years now and am very surprised at how little info there is on the net for this engine/vehicle combination. Learning how to set air mixture screws on Edelbrock carbs will give you the ability to adjust them like a pro. And worse, many claims of lean conditions and rich conditions are contradictory. The rich hole closest to the carb might have been better, but not by much. Its a very strong engine, lots of. I failed to mention earlier that I did put a kit in the carb to try to fix it and a new acc pump. Whether you need to replace an aging inchstocker inch or are looking for a performance carb to top your inchhot rod inch, the Edelbrock Performer Series carbs are the best choice for performance and value. Selecting the Correct Carburetor. The transition from idle to part-throttle is essentially the hand-off of the Idle System to the Primary Main System. It includes an assortment of rods, jets, and springs. In the illustration A indicates a bleed which prevents a rich condition and bog when the high speed circuit is reinitiated after deceleration. It would bog when you first got on it and got pretty bad mpg. There should be two screws on the front of the carburetor, which are used to adjust the air and fuel mixture. 81 corvette that I have had for some time. Terms often used are: Stuttering Hesitating Running Rough etc etc. 0 V6 OHV equipped Ranger for 10 years now and am very surprised at how little info there is on the net for this engine/vehicle combination. My brother-in-law and his father His father started adjusting the carb some. Choosing the Right Power Valve for Your Holley Carburetor April 14, 2015 Randy Bolig Drag Race 101 , General Engine , Guest Columns , How-To and Tech Tips , Tech 5 When it comes to tuning a Holley carburetor the power valve has always seemed a mystery to many. Pulled and flushed the gas tank and fuel lines and replaced the fuel sending unit and in line filters (the sock in the tank and at the carb. Had it rebuilt and it was jetted for my engine and it didn't make a difference. Well, it did help some quite the engine and gave a small improvement to the vacuum at an idle, but it still bogs backfired and at 3000 would still drop out the vacuum. Also, it is currently powered by the ignition/ACC line at the fuse box (straight connection, no relay), so if the ignition is in the ON position, it's continuously pumping. Look on the carburetor for numbers that are stamped into it. With the Edelbrock AVS2 carb in place, the TPS reported that it only required between 12 and 13 percent throttle opening to produce the same light acceleration away from a stop light. It merges detailed, step-by-step directions, complete with images, links to online and print resources, and a multitude of helpful tips and pointers collected from the members of Hotrodders forum. Compare the results of timed acceleration #2 to the base calibration and refer to the following section that best describes your situation: I am wondering if this is why My car does not like WOT I heard that being lean will cause the car to backfire through the carb and bog like mine is doing. a tipicul 400 needs 750 carb. Tried changing float levels up/down, fuel pressure 6 psi. I know im way rich on the low end so im going to lean that out for sure using the rods. I had flash automotive dyno and tune carb but didnt fix it. Gearing can also be a significant factor. How to Tune Edelbrock Carburetor Carb Idle Mixture Screws Choke Metering Rods Jets Fuel Air Vacuum - Duration: 8:02. Then came the Weber Edelbrock carb system, and a 200-500 cfm variable has turned out to be a real winner for part throttle economy with Throttle response, Torque and BHP gains throughout the entire rev range, and with very smooth and enormous top-end potential on any engine up to 5. i install the 1406 edelbroke carb with aluminium performance intake. It features. Still losing pressure under hard acceleration. Best thing to do is to buy a carb kit and play with the combo's until you like it. Footage taken from Holley Carburetor Installation & Tuning DVD. If you have the COMPUTER CONTROLED Q jet your dist is a CC HEI. I once ran a 63 chevy PK - 283 bored. I got the engine timed to the 6 before TDC GM spec. Rebuilding and tuning an Edelbrock carburetor. 04-04-10 06:07 PM - Post# 1892919 Any ideas on a carburetor bog… Here's the story. Make sure your vacuum advance is working as well, and you have the vac lines right. Q: I can’t get the “Bog” out of my mechanical secondary carburetor what’s wrong and how can I fix it? The sole purpose of the accelerator pump system is to provide a combustible air/fuel ratio during hard acceleration, especially from idle, for the time it takes the main metering system, via the booster venturi, to respond to the increase in air velocity. I had problems with a Edelbrock carb which is a remake of the Carter AFB and never did get it right, ended up with a Holly 3310 and slove all my problems. Gearing can also be a significant factor. The carb was rebuilt 4 years ago and probably only has 300 miles on it. Zebra F301 BP. Re: Edelbrock Cruise WOT Bog Help Did you read the info posted in the link yet, and have you installed the regulator with teflon tape? Digging into the carb is a last resort, last ditch effort, after you've correctly diagnosed and performed all fixes while the carb is bolted to the manifold. Installation of Street Demon™ Carburetor 1. This 4-barrel carburetor is available in a satin finish with an electronic choke, a square bore flange, and an airflow rating of 650 cfm. You need to check the centrifugal and vacuum advance units and either replace the dampener or at least find TDC on #1 and put a proper timing tape on it so you know what the timing really is. 5 that was in it) I drove it and there was some part throttle drivability improvement. I am at a total loss here and don't have a clue what is going on. Well, engine is rebuilt in my vette and the rear is now in. Figured I’d share it with you all, feel free to add to, correct, or comment. 5) Correct delivery to carb. 130 i have a 70 351c 4v. As you accelerate and spool up on the speed rather slowly it will finally get there but it bogs down under WOT or heavy acceleration, and after getting up to speed it seems to run fine again. The truck runs fine, as long as you are easy on the gas pedel, but if I stomp the pedal, the engine starts to go and then dies almost as if I flooded it. Here are my specs: 289 (stock), torker 2 intake, holley 4160 600 cfm vac secondaries, headers, T5, 3. That something you don't what on a strip engine, but it isn't as bad as it sounds for applications built to run on the street any amount of time. problem is that it doesnt always do this. Aim for the fastest opening without a bog. some days it fine and others its terrible and even dies on the highway. He said he changed the metering rods and step up springs in the carb to get rid of the flat spot he was having during acceleration. The square-bore is the carburetor most of us are familiar with. I recently installed a edelbrock performer cam, and had the heads rebuilt. How hard to get 400 hp out of a 400 pontiac engine then get the carb tuned to handle the new flow, and you'll probably be close. You can buy them also for around $200-250 used. I have had an edelbrock carb, 39FCR and now running a 40FCR. What I have checked; first changed pick up, cap, rotor, o/h carburetor change jets, rods (Edelbrock 1405), inspect spark plugs. He doesn't have much confidence in the rebuild kit supplier as he found one part 1/4' shorter than it should be. i have a question about a 1813 thunder series avs carb i purchased in 2007. Look on the carburetor for numbers that are stamped into it. The big four suppliers of 4 barrel carburetors today are Edelbrock, Holley, Quick Fuel and Barry Grant, each of these carburetor designs have strong and weak spots. Check our top 5 intake manifold gasket leak symptoms to find the cause and fix it. I have an 86 K5 Blazer, with a 454. It would bog when you first got on it and got pretty bad mpg. Carb can get bumped in shipping or transportation and can accidentally change the setting. This is a popular carb for the small block Ford and is the trickiest Performer carb to tune. Right out of the box the gasket for the top of the carb to the main body don't match up. Last but not least, check for vaccum leaks. We'll just have to see how it works - at least the Edelbrock carbs are easy to tune from what I have read in their tuning manual. The last carb they did for me is on a 79 C30 dually with a 454 and has 4:10 gears - it gets 12 mpg with a TH400 and tows like crazy. Dart Block, Edelbrock performer heads, Edelbrock Performer Intake, Fast EZ -1 fuel injection. Can't seem to dial in the carb, its brand new and has never ran correct. It is impossible for Edelbrock or Carter to have estimated the weight on the money for every and all applications. let me understand something. a tipicul 400 needs 750 carb. Fuel pressure good, timings right. We tested this machine in the same way that we tested the Chevy and, once again, throttle response had improved and the transition to wide-open throttle was no longer bogging down. Read about Carburetor tuning tips including power valves and centrifugal blowers, only at Chevy High Performance Magazine. The standard position is to have the rod in the 1st (A) hole. She stumbles and hesitates under normal acceleration. Anyway I just bought this boat last year (see pic below) and didn't have this problem. The original Edelbrock carburetor design is still available and offers affordable performance for hundreds of applications. The Edelbrock carburetor has a piston that draws fuel into the pump cavity past the plunger lip-seal when the throttle is closing (1). Bogging is caused by too much air for the amount of fuel entering through the jets. Attacked the rich idle issue by pulling the carb off and checking the idle slots. Dart Block, Edelbrock performer heads, Edelbrock Performer Intake, Fast EZ -1 fuel injection. Finally, there is an ingenious solution - the POWERBLAST PLATE by Thompson Performance, LLC. Check for sufficient fuel pressure. If you want manual, you can disconnect the rod from the electric choke at the tab on the side of the carb and connect your cable there. thats why i purchased this model carb and size. I don't consider an adapter plate to be an option. Problem all alone is in carb set up. If the carb is set up for lean cruise, it's not unusual to have some popping during compression braking. Engine will speed up with opening the idle screw. If you are really looking to make the AFB / Edelbrock carb a performer (which it is already pretty good), you need to calibrate it like we do Holleys, fuel curve, main jet, idle jet, air bleeds and so on. Holley Truck Avenger Carburetor yes/no ? Last week I had a friend in my workshop. Still losing pressure. FUEL REQUIREMENTS:Edelbrock carburetors require a fuel pressure of 4 - 6. I've swapped out the stock garbage carb on my '83 CJ I6 for a Motorcraft 2150 and I'm having some problems tuning it. I've adjusted timing and tuned the carb best I know how but it still stumbles at first upon acceleration and I can't seem to get it running right. A year worth of head scratching. Too much of either will cause flat spots or bogs. A couple of degrees can make a big difference in acceleration characteristics. Also, get an idea about intake manifold gasket replacement cost. Properly setting timing may cure ills without getting into carbs. 5 but I've also read between 5 and 9 is perfectly safe. Looked at diapham, etc. Keep tinking with it or switch out to a Holly. I got mine for $150 shipped. Has a NOS rochester Believe is a 4mv mod. I've had mechanics work on it and still not fixed. I look at the old manifold and it is an edelbrock - further investogation shows it to be for a Cleveland 351C 4v! Starting to think that some of my "jiggle" challenges may. You never mentioned what type of carb, manifold you have. This carb is incredibly easy to tune! Remember, No Jets!! You can literally tune this carb externally in seconds, not 10-15 minutes like a normal carb!! Oh, by the way, here are some other great features that the Patented Genesis "Big Air" Carb System offers. 00 for the carb and getting in on the engine. It seems that the high IFR metering blocks tend to have a very light tip in stumble, surge, buck, lots of names for it, not accelerator pump type bog from big foot movements, but slight light acceleration issues that are not fixed by a smaller IAB. I have Pertonix ignition, Flamethrower Coil, new wires, new plugs (gapped at. After a few days of sitting I have to pump the pedal quite a bit, but assume that's from the carb gas evaporating. The last carb they did for me is on a 79 C30 dually with a 454 and has 4:10 gears - it gets 12 mpg with a TH400 and tows like crazy. Subject: Questions on the 1910 QJet offroad carb Greetings! I recently purchased the 1910 QJet from Summit Racing, and have a few questions about how I can pull more power from this carb, and maintain the stability of this carb while off-road. Know where your timing is set before making carb adjustments. This means that what you always end up with a slightly rich mixture to prevent "bogging" when the load increases or during the transition from idle to running speed. If you should change out the carb to a non CC HEI. The Edelbrock was a 1405, stock right out of the box. It falls on it's face, and sometimes just stalls. I decided that moving into the correct millennium would probably be a good idea and went with the Sniper FI setup and a new fuel tank with a high-pressure pump (also a sniper tank). Upon opening, the lip-seal seats, allowing the plunger to force the fuel through another one-way valve, the Pump Discharge Ball and Weight (2), and the Pump Jets (3) into the primary throats. Pull the top off & have a look at the cup in the bore, it should be near onto snug, but smooth up & down. 2 BBL carburetors (and 1 BBLs) are tested with a 3 inch va. Attacked the rich idle issue by pulling the carb off and checking the idle slots. acceleration, double pumper, mechanical secondary carbs, initially depend only on the accelerator pumps to provide adequate fuel, until enough air flow can be established to begin pulling in the main system. But now my 360 bogs when you floor it. Take the carburetor cleaner and spray it where the intake manifold is attached to the engine. Power Tuning a Quadrajet Carb - Route 66 Hot Rod High Manual choke setup for quadrajet carb. So with the wiring and connectors, probably right at $350. Mainly, I just want to know what the two screws on the front of the carb do and how to make the carb run, or at least idle, with a leaner mixture. Have you checked the air valve spring wrap on the carb?. 2017 Ford Motorcraft 4 Bbl Carburetor Price List. Long story short I looked up tables when this little carb would become a restriction on a stock 440. I set this guide up in four sections. an improper assembled cap/ coil/ ground strap relationship may lie under the cover on top. Engine hesitates or “bogs” during initial acceleration (after engine is at operating temperature). What I'm hoping for is that someone out there has a very similar application and had the same problem and fixed it. I have had an edelbrock carb, 39FCR and now running a 40FCR. Gearing can also be a significant factor. The accelerator pump controls response when pressing down on the gas pedal. People with high-stall converters usually don’t complain about off-the-line bog, they complain about lousy gas mileage and broken transmission or driveline parts. Idles well accelerates well. I also check the fuel pump and the pressure is fine. If you are experiencing a bogging down on acceleration try placing the rod in hole B, then hole C. Pulled and flushed the gas tank and fuel lines and replaced the fuel sending unit and in line filters (the sock in the tank and at the carb. Why does my engine spit or backfire? First off, you need to determine whether it is backfiring out the exhaust or back up through the carb.