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Old 08-18-2002, 02:24 PM
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Post holley vs. edelbrock

i just want everyones opionin on which brand of carburetor would work best on a 70 gto with a 400, tell me which brand of carb would work best performance wise?

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Old 08-18-2002, 03:40 PM
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I have used both. The Holley was a 650 dp and the Edelbrock is a 600 manual choke. The Edelbrock gets my vote. It requires less tuning and is dead reliable and fuel economy is not too bad. If you want ultimate horsepower though, I think the holley is the way to go. Daily driver-Edlebrock. Racing-Holley.
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Old 08-18-2002, 03:42 PM
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Both excellent carbs, but Holley has my vote for POWER...
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Old 08-18-2002, 04:35 PM
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Agree with both of these guys, but did you ever think about a Carter by Federal Mogul? I run a 750cfm on my poncho 400, love it to death! Carters are a smidgen less exspensive too.

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Old 08-18-2002, 08:23 PM
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Am I the only one that stands behind Barry Grants' carbs?
Sure they are a little more costly, but WELL WORTH IT IF IT IS POWER YOU ARE AFTER.
I have had several HOLLEYs.....They are ok....but never again. Never did try a EDELBROCK..I know a few who did and they were disapointed.
Carter is in my opinion a QJET with a brand name on it. Nothing more.
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Old 08-18-2002, 08:32 PM
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Holley has my vote, however if your not too sure about tuning one or your gas budget isnt very high, the Edelbrock is the way to go. Their easy to set up, and get about 3-4 more mpg than a holley, but, your sacrificing the performance you will get from a holley....
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Old 08-19-2002, 03:13 AM
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I have to agree w/ Steve. The Edlebrock/Carter carbs are about the best if you just want to put it on and go with few adjusments. However, the new Holley Street Avengers claim the same "out of the box" performance. I know 3 people who use them and swear by them. If you are looking to knock seconds of of your e.t.'s then go with a Holley. Many adjusments can be made to increase throttle response and performance. Holley's are vacuum actuated using diaphrams, so be careful. A simple backfire could blow out your power valve, which will kill your gas mileage and perormance.
Good luck!
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Old 08-19-2002, 07:41 AM
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One word Quadrajet

IF not I would go with the Carter, I have never had good luck with a Holley. The Winston cup driver I talked to the other day run a race prepared Holley. These are all flow tested. If you want to go for a high performance carb with manual secondaries see if you can buy a Winston preped Holley.

Personaly I don't like the idea of the power valve going out everyting my car backfires.
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Old 08-19-2002, 12:09 PM
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come on now, holley has a kit now that you can put in quick, a little hole and you pound in a check valve and that won't happen again. took'em long enough but it's been around a coupla years now.
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Old 08-19-2002, 02:45 PM
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Bull, how do these work? Do you notice any hesitation when you get on it? I have seen these, but I never tried one because I never went back to Holley. I did use Holley for drag racing back when I was in Texas, but that was almost 10 years ago. Let me know, I have a used 650 sitting around that I might throw on my Nova to try out if they work good enough.
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Old 08-19-2002, 06:43 PM
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First off, I use a Carter on my 69 GTO with the 400 and I have had nothing but good out of it. Also, if you can tune a QJet just right, they will hold thier own everywhere i have ever seen one go. But they are hard to get tuned that good and most people get them close and since the performance is lower like this, they think they are bad carbs. Also, i have owned a QJet and a Carter and they are not the same thing. In fact, i noticed many differences in them. I have heard of people switching from a Holley to a QJet and getting better times with it. But, from the two choices given, I would take an Edelbrock over a Holley.
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Old 08-20-2002, 10:35 AM
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I've tried both Edelbrock and Holley used Street avenger's on both my car and truck love them. Edelbrock always bogged down on hard start
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Old 08-20-2002, 11:28 AM
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Hmmmmm blonde....brunette.....redhead......I like them all, some more than others.

Geez that sounds familiar?

Holley or Carter AFB (Edelbrock) two well known carbs with long histories, which do I like better?

Weeeellllll.....long before they were known as "Edelbrock" carbs a good friend and I played extensively with Carter AFB carbs on Dodge 440 engines and found them to be very tunable and good performing. The problems we had related mostly to using them on wildly cammed engines with open plane intakes, it seems that the design is not set-up to deliver the kind of fuel flow needed for a radical engine and we were constantly trying different secondary weights and profiles in the search for a profile that would allow the engine to come off the line well and bring the secondaries on gradually enough so that fuel flow could catch up and not give us a bog or worse case a lean "sneeze" which usually caught the carb on fire and usually all the wires in the engine compartment at the same time.

Since we were not having much luck getting these things to perform the same from day to day we tried a Carter thermoquad and found them to be more sophisticated in fuel delivery but still inferior to the Holley 600 vacuum secondary these Carters had replaced. At least they didn't sneeze all the time and we didn't have to carry around fire extinguishers.

We next tried a Holley 750 double pumper and I have not looked back since, nearly every single part of the fuel delivery is adjustable and if you want you can even get a vacuum secondary version of the 3310 Holley, called the 3310-2. This type of carb has worked well for me on everything from 440 Chryco engines to 289 Fords and I have been able to adapt them to every situation with ease. You could say I am sold. Heck I even ran a 650 spreadbore double pumper on my Mazda Rotary 12A with no problems whatsoever other than tuning. Parts are plentiful and the new design vacuum secondary models have the little plastic cap for the secondary spring so there is no need to pull the entire secondary diaphram anymore. And since the fuel curve is completely adjustable no more carb fires due to lean mixture at launch.

I think Carter (Edelbrock) carbs are great for mildly cammed street cars but if your looking for complete adjustbility and great looks (you can't tell me a Holley is not the finest looking carb there ever was!) then a Holley is my choice every time.

Besides I have a box full of parts and two jet plates full so I can't stop now! Now where did I put that Ford kick down linkage, I know it's in here somewhere?!
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Old 08-20-2002, 12:05 PM
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I agree with 4jaw. Holleys get a bad rap mainly 'cause people don't understand how to tune them properly. Blown power valve diaphragms are eliminated buy instlling a tiny check valve in the carb base plate. Carters, Edelbrocks, Rochesters are great carbs and can be tuned very well to run in a specific warm engine but for ease of tuning and great range of operation from mild to wild, can't beat the Holley.
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Old 08-20-2002, 12:56 PM
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[quote]Originally posted by 4 Jaw Chuck:
<strong> Carter AFB (Edelbrock) </strong><hr></blockquote>

Aww h*ll, 4 Jaw. You beat me to it. Didn't Edelbrock buy Carter or something? I know if you go to the parts store and need something for a Carter, the Edelbrock kit is the same.

My dad used to run an Edelbrock on the Duster, and then switched to a Holley. Don't know what he's reasoning for it was, though.

[ August 20, 2002: Message edited by: BigBlockBabe ]</p>
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