I had a 78' Pontiac 400 which originally ran with the factory said "Quadrajunk" carb and it ran great for it's stock application. Once it was bored, stroked & built, I dyno'd using a vac secondary 750 Holley, a 750 Edelbrock and a Holley 650 Double Pumper with mech secondary. On the Dyno, the 750 Edelbrock allowed the engine to produce the most HP & torque, but the Holley 650 Double Pumper mech. secondary gave quicker responsiveness, which is felt more in seat of the pants driving. It all comes down to using the right carb for your application and what you prefer. Note: I am not saying Edelbrock makes more HP, it just happened to be that way in my testing with this particular motor..
My point exactly. New carbs are a bit expensive for me...rebuild kits and core carbs are cheap. Who cares what brand it is...rebuild it and go.
The Edelbrock carb is an almost direct copy of the Carter AVS carburetor now reproduced by Weber USA. The Carter AVS was the popular Mopar muscle car carb on most OEM 1968-1972 Mopar single four or dual quad engines, although Chevy did use them one year on the 327. The "AVS" means "Air Valve Secondaries". When you mash the pedal, the secondary blades in the base pop open, but the top ****erfly "air valve" opens slower, preventing a lag, lean spot, or stumble and also helps meter the correct amount of air/fuel based upon engine demand. What this means is anybody can bolt a correctly functioning Edelbrock (or Carter AVS) carb onto their engine and not worry too much about tuning it or overcarburetion. To the average end user it's a "Bolt on and Go!!" with little knowledge needed.
Who cares what the deal is, to all you guys that don't like Holleys, send them to me. PM me for my address. Thanks JJibs
IF you know how to tune them they're great, though they are not a Quadrajet "style" carb. That's yet another beast. I like those as well. And if in all your years of wrenching you are referring to them as a Quadrajet style carb there is a reason you can't get them to run right.
Ha Ha Ha Ha, that is too funny. But, have any other carbs come by and been affraid for their lives after seeing the one that got bashed, though? Or did they just ignor it?
Are we having the carb argument again? Have a carb you hate? Try this: Clean it out inside. Set the float levels. Install a properly set fuel pressure regulator. (Actually, you should do this with EVERY carb.) Then get back to me, if you still have a problem. This is the same advice that I give to everyone, regardless of carb brand. Very few who follow those steps ever get back to me. Sometimes finding the true source of a problem requires the use of a mirror.
edelbrocks /carters RULE after owning one every piece of **** holley that comes near me gets thrown in the trash can ive bougfht new holleys old holleys rebuilt holley and had holleys rebuilt NONE of them were ever worth a damn buy and edelbrock bolt it on set the air/fuel screws and drive no leaking fuel bowls , no blown power valves , no leaking crossover tube orings ,not having to buy clear float site plugs EDELBROCKS /CARTERS RULE !!!!!!!!!!!!!!!!!!!!!!!best carb around and they werte original equipment on the mighty hemi and others
The biggest issue with non-original carbs is putting on too large or too small or wrong design; not with make. However, the quality control of some makes is much better than others. In the hands of someone thoroughly versed in the design/function of a particular carb of a reasonable size for the engine; the carb can be made to work (at least for awhile). Jon.
While attending an NSRA event several years ago, I noticed Holley had a Repair and Support tent in the parking lot. I had to LOL when I saw the "block long" line of guys, toting Holley carb's waiting for ***istance. I think there's a story here, with Edebrock simply install and drive!
No they are both square bore, at least the common ones are. I guess at one time, Holley and Edelbrock both made a spread bore carb too. I don't know if they still do or not, if I'm gonna run a spread bore it'll be a Rochester Quadrajet unless I find an Edelbrock knockoff Quadrajet cheap. Larry T
I'll be the first to admit that you just described my cars. I understand most things on a vehicle pretty well, but I'm at a loss when it comes to working on carbs. I would love to see a good tech on tuning Quadrajets (I have TWO that drive me crazy...), Holleys, and Edelbrocks... Slonaker
My nailhead originally had a Carter, now it has an Edelbrock. So, besides some semblance of originality, it runs great, easy to tune and maintain. The last Holley I had was on a pretty strong 350 4 bolt in a '68 Camaro, performed well, but blew out power valves all the time.
Meh, either one works. I've got a edelbrock that I replaced a qjet with, ran just fine but diseled. Grabbed a $30 holly, that stopped but didn't like to hot start. Only bittchy thing I have to say is about a 4175 holly spread bore I have. It ****s to get gaskets.
There is a local dyno tuner and he likes the Carter/Elelbrock. Between jet, metering rod and spring options, there are literally hundres of possible mixture combinations. However, a friend put a Paxton supercharger on a pumped sb Ford and the Edelbrock was not working out. He went with a Holley preped by a carb shop in socal and it really woke up. Another plus for the Carter/Edelbrock, there are no seams below the air horn so the main body/float bowl doesn't tend to leak like some others.
Does anyone know how to stop them from stalling out under hard braking? Besides that they are great. Yanked mine off because of that. Seems to be a common problem. Adjusting the float doesn't help.
Mine came with an edlebrock. I don't think it looks the best sitting there but I've yet to touch it. It sat outside in the open for awhile before I got it (it did have the aircleaner on it) and then it sat in my shed the winter before last. I put it back on and it was right, right off the bat. Starts easy, doesn't miss a beat. The linkage is all set up for my Hydramatic. Screw the looks, I'm not messing with that.
I have used holley's for decades. I've also used AFB's and Ford 4100's. The holley's can be finicky, but then so can all carbs. I like the almost infinite adjustability of them. Almost nothing on them you can't tune by playing around with them. I've always found they are very intolerant of any kind of debris or trash getting in there! Results in instant rejection. Not to mention, if they sit for any period of time with fuel in them (as with all carbs), those metering blocks are not going to work well. Usually just makes idle quality impossible. Whenever, I've built a vintage car, be it Chevy, Mopar, Ford and need a carb, I want something that looks "vintage", not a shiney, polished, overdone fancy piece that looks like it just walked out of a catalog. I want a real, vintage piece, restored to its original appearance, so I can play with it! I always thought it would be cool to have a mix of Holley and the Ford 4100. That way I could have all the Holley tricks, and be able to change jets without pulling a bowl. I know, you can get kits to do that, but I just stick to basics....the KISS principle...keep it simple stupid.
The afb style carb has been successfully ran for decades. And there is nothing wrong with q-jets if you know what you're doing with one of them. Personally, I love the quadrajet. What a great, all-around fuel metering device for mileage, driveability and performance. Can't really say that about the others, other than all-out performance. Holleys just have more adjustability built into them for fine tuning than the others. Hmmmm..... You may have answered your own question.
Put ox sensor bungs in your exhaust pipes and get a Innovate Motorsports LM1or LM2. you can tune the carb a lot eaisier. Ago <input id="gwProxy" type="hidden"><!--Session data--><input onclick="jsCall();" id="jsProxy" type="hidden">
I'm a Rochester/Stromberg guy. You should hear carbking go on about Edelbrocks in a negative fashion. I share his sentiments. ~Jason
Ditto, man. Makes me wonder if these guys aren't just bolting them on and running 'em with no adjustment! ~Jason
^ this x 2. Carbs are rated for cfm, at a specific vacuum. If your engine is wacked or tweaked to pull more or less vacuum than what the carb is rated at, the cfm you pull isn't what's on the box, and your fuel ratio won't be right. Tune it to your specific engine and it'll all be good (no matter what brand of carb you use).
Local book store, and pick up a copy of Cliff Ruggles book on modifying Q-Jets. Most user-friendly carb book I have read in 50 plus years of working on carbs. Jon.
qudajunks, carters, and edelbrocks I lump em all together. I'm generally referring to the wonderful square style bodys..that perform oh so well. I just find it odd you see so many on cars here, or on at the "cruise nites, ect".. but you rarely see them at the track. I've personally had issues with some of these carbs and have had much better luck with Holley & Demon..but maybe it's my voodoo doll at work!
Same here! Summitracing has a remake of the Holley 4010. Kind of Ford 4100 with Holley parts. But the Summit carb has changeable idle, pump restrictions. Too shiny though!
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