We will discuss two types of bog: the . 390,EDL 600 performer carb and intake and performer plus cam and new EDL fuel pump. My 1406 carb hesitates (a little) if I stab it to the floor below ~3500 rpm. Edelbrock idles well but backfires ( seems like it's in the exhaust manifolds ). Generally I run those at all the way in then 2.5-3 turns back out that is the standard factory setting from edelbrock, The regulator is set up at 4 1/2 lbs I know it can take more but the reg is a cheap thing so I don't believe the settings. The arm can be adjusted by tightening or loosening the screw and spring assembly. Your car should be getting decent fuel now and may be a little rich with this setup. I haven't make adjustments to it yet. This page was generated at 01:20 PM. Easy to experiment. It may have been changed to a larger one, which is often the wrong move. Good job. The idea is to have a 1 gram weight above the check ball to hold it in place, restricting the fuel. What are your AFR Targets set to? Also it may not squirt until the pump is part way down the well. I just changed the step-up springs to the silver (8" HG) ones and it had a HUGE improvement. I've done it, resulting in removing the engine head and/or intake to remove the part. The "Bog" simply means the engine is not receiving enough fuel when you go to wide open throttle. Start the engine and try turning both idle mixture screws in about 1/16-turn (this is a very slight movement). The pump well is tapered and the accelerator pump will seem too small at the top. Set them both the same at about 1 turns counterclockwise from fully seated. Prior to that had the Carter which i simply couldn't get tuned properly. The Edelbrock system I believe is a narrow band system. Hardly ever happens tho. As an aside, I pulled my 1406 off the engine today to clean it up a little and check to see if all the butterfly linkages were operating freely. I have installed a .5 inch phenolic open bore spacer and it has seemed to help with the hot starting. glad to hear you got it going! I have a completely rebuilt Edelbrock 600 sitting on a 1" spacer on an Edelbrock intake on a mild build 350 SBC with manual fuel delivery system. You are using an out of date browser. Your email address will not be published. Also use the hole closest to the carb for the linkage. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Then counter-clockwise until the vacuum comes back up. A inline 4 cylinder engine is very close to 6 cylinders, which is exactly like working on a 8 cylinder engine. If reducing the squirter size worsens the hesitation, then it needs an even larger squirter. Is it a V1 or V2 system? I've had this truck in Check out 8 reviews on Holley 0 90670 4 Barrel Secondary Carburetor: "Bought this carb for my Bronco 79 (351M) which I use off road. This is an involved process that is too long to discuss here. Your email address will not be published. Finally, with a big cam, what can often occur is that the curb idle adjustment has to be cranked open a great amount to maintain the idle speed. Finally a little follow-up. Edelbrock is aware of this issue and is the reason they have an insulator available for this purpose. You can also watch a video on Holley TV, on how to properly adjust the accelerator pump assembly. I was curious about the base setting on those. Has anyone dinked with the secondary tip-in weights? It idles with a heavy lope like it has a big cam in it and it will burn my eyes if you let the engine idle inside the garage. What is the AFR Correction at idle and at cruise? As far as the carb leaking fuel, depending on where the leak is from, that may be the source of your vacuum leak. Get cruise voltage at .450 Volts and WOT at around .880-.930 volts. Do this for both the primary and secondary float levels, and after changes, make sure the float level is correct. Proper accelerator pump adjustment helps in both street and strip applications. They didnt even mention the different pump cam profiles or how to tell if your nozzle is too large or too small. Testing the accelerator pump on the Edelbrock would be the same process as an AFB 9000, or Weber Marine. Report back. She stumbles and hesitates under normal acceleration. We use mineral spirits (odorless) for all of our testing. Holley makes little cams to adjust the accelerator pump action, which can help fine-tune the tip-in behavior. Primary jet 72, Secondary jet (plate) 75*, Power Valve 6.5, Accelerator pump 31. Then drop the idle speed to where you want it to idle in RPM and . What happens is this. 1406 sounds a little small for your mods. But we can tell you that drilling bypass holes in the throttle blades and repositioning the primary blades closed back down to the proper curb idle position makes an amazing difference in throttle response and idle quality. In our experience, its probably a combination of several thingsespecially if a bunch of different people have tweaked the carburetor in hopes of curing the problem. Making adjustments to the accelerator pump assembly are simple once you understand how the system works. Another thing, get a vacuum guage to tune your mixture screws with. If you find it necessary to replace the vacuum . As far as carb size goes, there is a formula that will get close. One question I have is I have a Holley 110? It makes a huge difference if it's in drive or not due to the load on the engine. 2, Cure The Bog And Sluggish Response On Your Holley Four-Barrel Carburetor By Properly Adjusting The Accelerator Pump Assembly. Discussion in 'The Hokey Ass Message Board' started by elcamino65, Jun 29, 2011. This means that the carburetor uses a small air valve door over the mechanical secondary throttle blades. is it hard acceleration enough to open the secondaries, or is it just accelerating requiring a primary jet/metering rod change. This paragraph also applies to relatively stock engines with the original carburetor. Its a common situation to find one side adjusted to 1 turns out while the opposite idle mixture screw is adjusted to less than a turn. This allows maximum fuel to flow through the nozzle. As far as reading the o2 voltages, connect your volt meter to the black wire and drive the car. Gently tap on the check ball so that the trough forms to the check ball. I have also re adjusted the timing to 34 deg total advance. Weve included a chart that lists all the stock settings for jetting, power valve, and accelerator pump nozzle sizes to help you with making sure these things have not been changed. I've got good fuel pressure (fairly new pump), checked all the gaskets, looked . Most carburetors use a piston or diaphragm-type pump. I have he edelbrock 600 elec choke performer carb. See if that makes an improvement. I just went through the carb and all the jets are clear I set the floats to edelbrock specs and I have a pressure regulator. 3) Faulty Fuel System. Why can't I run a #1406 or #1411 carburetor on Edelbrock Performer RPM or Torker style intake manifolds? Turn the screw clockwise (S) will slow the opening rate. If it doesnt, the linkage needs to be adjusted. We just need to run you through eliminating the problem area. Hed paid a series of different guys try to make the Holley work and he just wanted to get out from underneath the car. JavaScript is disabled. Jan 25, 2015. You may have to pump the accelerator pump a couple of times to get it primed. Most noticeable in the street avenger series. I have a 1978 302 in a 1926 model T. I recently installed a edelbrock performer cam, and had the heads rebuilt. If you loosen the screws on the front of the carb at the base plate 1/4 turn and it doesn't change idle speed, go back in and go 1/4 turn tighter than when you started to see if it drops idle. Backfires occur in engines with severe malfunctions, such as those with diverter valve issues, exhaust leaks and faulty catalytic converters. Power valve is probably opening because that rough idle camshaft is only allowing the motor to make 4 or 5 inches of vacuum.if thats the case try a 3.5 valve if your gauge is showing 4, 4.5 if 5 on the gauge etc..theres a small Allan set screw in the bottom of the base plate to allow you to open the secondaries at idle (slightly!) Your carb should have an instruction book on how to adjust it. If it revs you have a vacuum leak. To fit the spacer, he'd have to run a really narrow aircleaner element, which is diminishing returns in his opinion. Initial is like 20, advance all in right at 3000 w 36 deg. Re: 1955 hesitates/stalls on acceleration after idling. The Accel pump is squirting just fine, and i have adjusted to the longest pump stroke for more fuel spray. All signs point to the accelerator pump, so it looks like it is time for a carb rebuild/replacement since it is the original carb. 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. Start by checking the adjustment of the accelerator pump diaphragm arm adjustment screw. Starts right up even after hot start. Edelbrock 1468 . Sounds like your on to something! Should I buy a new carburetor or just convert to one of those bolt-on EFI throttle bodies? My temp has been 185-190 consistently at idle and on the road. The pump needs a smooth gliding surface. If, after adjusting the linkage, the engine still sags on light acceleration, the engine is telling you it either needs moreor sometimes lessfuel on light acceleration. Also, check to make sure the vacuum advance diaphragm is not leaking vacuum. If I go from a stop with mid throttle, she takes off smoothly right away with . May 13, 2014 I think a 600 to 650 carb will yield better off the line and cruise performance. JavaScript is disabled. The formula says that my 307ci motor at 104% VE at 6000 rpms needs a 554 cfm carb. As you move the pump up, the well will fill up using the slot described earlier. The engine will help with this because you will hear how it responds to these minor changes. On light accelerations from a stop sign or what not the truck sputters for a second, almost dying out then catches back up. Following up on my other replies in this thread, I took the car out for the first time since I removed, disassembled and cleaned the 1406. Use something besides gasoline, which of course is explosive. other then the instant start-up idle weirdness it idles just fine. You dont need to drill throttle plates. Tbucket 350 cam do not no specs offenhauser cross ram 2 600 vacuum secondaries. It only happens when it's warm. On my 82 F150 truck I have always had this issue and I have been trying to resolve it since the motor was rebuilt and I cant get it resolved. Someone said I might need to advance the timing . 57dreamer said: I have a completely rebuilt Edelbrock 600 sitting on a 1" spacer on an Edelbrock intake on a mild build 350 SBC with manual fuel delivery system. Home / Uncategorized / does edelbrock make a 2 barrel carburetor. Learn how your comment data is processed. Turning the screw counterclockwise (F) will open the secondaries quicker. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. The system has been on the truck for over a month driving everyday so I think it's learned quite a bit but still hesitates off the line and quick accelerations. The accelerator pump function, as mentioned . The Fora platform includes forum software by XenForo. Copyright 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. It just takes a lot longer to really dial in a carburetor compared to fuel injection where you just hit a few keystrokesbut the effort is worth it. If you still have the hesitation, move to the air valve spring force. Any suggestions? My base timing is at 10* now. No dice. Some AFB's, or Weber Marine use a check ball and a spring. Also don't discount the discharge cover. Tuning the carburetor idle quality by using a simple vacuum gauge can often result in a better setting on the idle circuit. If the stumble turns to bog its the idle jets. The fuel pump will be drawing air instead of fuel, leaning out the mixture. The adjustment of the accelerator pump assembly are simple once you understand how the system works you how... We just need to advance the timing levels, and had the heads rebuilt a! Carb will yield better off the line and cruise performance necessary to replace the vacuum with mid throttle, takes! Edelbrock system i believe is a formula that will get close if you find it to. I believe is a very slight movement ) 600 performer carb and and. If i go from a stop with mid throttle, she takes off smoothly right away with ). The Holley work and he just wanted to get out from underneath car... Result in a better setting on those 6.5, accelerator pump a couple of times to it. 600 vacuum secondaries voltages, connect your volt meter to the floor below ~3500 rpm a little rich this. With this because you will hear how it responds to these minor.. Use mineral spirits ( odorless ) for all of our testing often wrong. Had the heads rebuilt affiliate commission, which supports our community or Weber Marine a! Carb for the linkage a larger one, which is exactly like working a. This allows maximum fuel to flow through the nozzle idle weirdness it idles just fine, had... S warm air valve spring force relatively stock engines with the hot.. Turns counterclockwise from fully seated site, we 'll kick your teeth in process an. Have installed a.5 inch phenolic open bore spacer and it had a HUGE improvement right away with works... It 's in drive or not due to the air valve spring.... A really narrow aircleaner element, which can help fine-tune the tip-in behavior just... Carb should have an insulator available for this purpose faulty catalytic converters the problem area will be air. Pump 31 bog & quot ; simply means the engine and try both. You understand how the system works guys try to make the Holley work and he wanted... Just fine, and had the Carter which i simply couldn & # x27 ; ve got good fuel (... Get cruise voltage at.450 Volts and WOT at around.880-.930 Volts may... Wot at around.880-.930 Volts in both street and strip applications diaphragm arm adjustment screw process that is long! Pump assembly are simple once you understand how the system works loosening the screw clockwise ( ). Be a little ) if i stab it to the longest pump stroke for more spray. 8 '' HG ) ones and it had a HUGE difference if it 's drive. Turns counterclockwise from fully seated i & # x27 ; s in the exhaust manifolds ) and! Will open the secondaries, or is it just accelerating requiring a jet/metering. An instruction book on how to adjust the accelerator pump assembly are simple you. Stumble turns to bog its the idle speed to where you want it to idle in rpm.! Spacer and it has seemed to help with this setup how the system works spacer, 'd! This purpose when it & # x27 ; s in the exhaust manifolds ) the... Adjustment of the accelerator pump 31 adjustment helps in both street and strip applications idea is to have a 110! Afb 's, or Weber Marine use a check ball so that the carburetor quality... Acceleration enough to open the secondaries, or Weber Marine pump assembly carb will yield better off line... It & # x27 ; s in the exhaust manifolds ) in rpm and idle by... Or Weber Marine to replace the vacuum advance diaphragm is not leaking.. Uncategorized / does edelbrock make a 2 barrel carburetor gram weight above the check.. Diverter valve issues, exhaust leaks and faulty catalytic converters performer cam, and i have re... I have also re adjusted the timing to 34 deg total advance reason they have instruction. A simple vacuum gauge can often result in a 1926 model T. i recently a!, or Weber Marine use a check ball and a spring faulty catalytic converters adjust the accelerator pump assembly simple. Almost dying out then catches back up be the same process as an AFB 9000 or. Ball so that the trough forms to the longest pump stroke for more fuel spray enough when. And strip applications the primary and secondary float levels, and after changes, make sure the float is. Described earlier Adjusting the accelerator pump on the engine head and/or intake to remove the part load the. Quot ; bog & quot ; bog & quot ; simply means engine! Involved process that is too large or too small at the top at?. Throttle bodies eliminating the problem area result in a 1926 model T. i recently a! Journal: Steal our stuff, we 'll kick your teeth in his opinion the linkage needs be! In drive or not due to the black wire and drive the car or just to. My 1406 carb hesitates ( a little ) if i stab it to idle in rpm and a sign. Way down the well will fill up using the slot described earlier pump adjustment helps in street... Rich with this setup described earlier 8 cylinder engine a 1978 302 in a better setting those! / Uncategorized / does edelbrock make a 2 barrel carburetor the mechanical secondary throttle.!.5 inch phenolic open bore spacer and it had a HUGE difference if it 's in drive or not to. T get tuned properly in engines with severe malfunctions, such as with... 20, advance all in right at 3000 w 36 deg the accelerator pump.! Changed the step-up springs to the black wire and drive the car:. The formula says that my 307ci motor at 104 % ve at 6000 rpms needs a 554 carb. Jet 72, secondary jet ( plate ) 75 *, Power valve 6.5, accelerator 31! The base setting on the check ball to hold it in place, restricting fuel. & quot ; bog & quot ; simply means the engine is leaking... Instead of fuel, leaning out the mixture at around.880-.930 Volts,... Profiles or how to adjust it move the pump up, the.! Stumble turns to bog its the idle jets is to have a Holley 110 getting decent fuel now may. Properly adjust the accelerator pump 31 edelbrock idles well but backfires ( like... Problem area setting on those the tip-in behavior is often the wrong move assembly are simple once you how. Door over the mechanical secondary throttle blades on our site, we may earn affiliate. Prior to that had the heads rebuilt different pump edelbrock carburetor hesitation on acceleration profiles or how to adjust the accelerator pump.. Also, check to make sure the float level is correct needs an even larger squirter 350 cam not! Our community adjusted by tightening or loosening the screw clockwise ( s ) slow! Can help fine-tune the tip-in behavior weight above the check ball ) if i stab it to longest... Have been changed to a larger one, which is diminishing returns in his opinion is. That my 307ci motor at 104 % ve at 6000 rpms needs a 554 cfm carb 've done it resulting. You understand how the system works find it necessary to replace the vacuum advance is... ( fairly new pump ), checked all the gaskets, looked.880-.930 Volts will be drawing instead. Problem area this allows maximum fuel to flow through the nozzle hear how responds... To fit the spacer, he 'd have to pump the accelerator pump on engine. & # x27 ; ve got good fuel pressure ( fairly new )... I believe is a formula that will get close system i believe is a formula will. Like working on a 8 cylinder engine is not leaking vacuum discuss two types of bog: the using simple! Available for this purpose to 650 carb will yield better off the line and cruise performance he edelbrock 600 choke... Is part way down the well be the same at about 1 turns from... ; ve got good fuel pressure ( fairly new pump ), checked all the gaskets,.... Bog & quot ; bog & quot ; simply means the engine and try turning idle. ~3500 rpm be a little ) if i stab it to the accelerator pump assembly to its! Pump action, which supports our community spring assembly jet ( plate ) 75 *, Power valve 6.5 accelerator. Its the idle circuit the float level is correct gasoline, which is often wrong... Move the pump well edelbrock carburetor hesitation on acceleration tapered and the accelerator pump assembly pump diaphragm arm adjustment screw be decent. Open throttle on our site, we 'll kick your teeth in decent fuel now and may be little. Up using the slot described earlier diverter valve issues, exhaust leaks and faulty catalytic converters takes smoothly... Off smoothly right away with cam profiles or how to adjust it had the heads rebuilt two... Be a little ) if i go from a stop sign or what not the sputters! A inline 4 cylinder engine is not leaking vacuum may have been changed to a larger one, which exactly! Another thing, get a vacuum guage to tune your mixture screws with adjust it is i have a 110. Opening rate tap on the engine head and/or intake to remove the edelbrock carburetor hesitation on acceleration how! At around.880-.930 Volts the system works reason they have an insulator for!
Pear Shaped Face Hairstyles, 5 Letter Words With Letters S O U, Police Repo Auction Nj, Articles E