82customdeluxe
Forum Newbie
Posts: 2
Age: 38
Loc: lake county fl
Reg: 07-17-12
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07-22-12 01:46 PM - Post#2250911
I have a chevy 350 crate motor with a carter carb which is given me problems runs good sometimes runs like crap others and a discount elderbrock carb which needs rebuild which should i rebuild on my 82 custom deluxe 4x4.
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82customdeluxe
Forum Newbie
Posts: 2
Age: 38
Loc: lake county fl
Reg: 07-17-12
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07-22-12 01:56 PM - Post#2250916
In response to 82customdeluxe
would love to here from anyone that knows anything about carter 4barrel carbs
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 Vaughn
"11th Year" Gold Supporting Member
Posts: 13558
Loc: Colorado Springs, CO
Reg: 08-08-04
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07-22-12 03:36 PM - Post#2250951
In response to 82customdeluxe
Carter and Edelbrock are the same carb. Edelbrock bought the rights from Carter to reproduce the AFB.
You will need to know what CFM rating you have, in order to determine whether either carb is suited to your motor.
Beyond that, you will need to know what jets and rods you have, to determine whether you are in the right ballpark to jet it correctly.
You will also need to be able to read plugs or have access to an exhaust analyzer to get your jetting right for your size motor, the cam you are using, and your altitude above sea level. If you have a local shop with a dynamometer they can jet your carb correctly.
You can also send it to a specialty carb rebuild place, they usually can jet a carb correctly given the above parameters.
Bolting on whatever carb you have lying around is a good recipe for a bad running motor.
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75gmck25
Contributor
Posts: 345
Loc: Alexandria, VA
Reg: 12-25-07
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07-23-12 03:33 AM - Post#2251081
In response to Vaughn
I was using an Edelbrock 1406 on my SBC, and I installed a wide-band AFR meter to use in tuning. The carb was very lean out of the box, and even with Edelbrock's tuning kit I could never really get it into the 14.7 AFR range at cruise. It started and idled fine, but power was never great.
I then bought a Quadrajet from a junked '86 Chevy truck and its the last model they made before there were any electrical controls. I bought a rebuild kit from Cliff's quadrajet and set it up according to his recommendations. I have not rejetted it yet, so it runs slightly rich, but it definitely runs far better than the Edelbrock ever did.
Rebuilding the Quadrajet was not cheap because I bought the junked carb and complete rebuild kit with new throttle shaft bushings, and also had to buy carb cleaner ($28 for 3 qts)and other supplies. However, it runs better than the Edelbrock ever did and overall driveability is excellent.
Bruce
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 gchemist
Senior Chevytalk Moderator
Posts: 20827
Loc: Austin, TX 78748
Reg: 05-09-00
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07-23-12 04:49 AM - Post#2251094
In response to 75gmck25
Welcome to the site. Edelbrocks are quirky carbs.
A $15 vacuum gauge makes the carbs easy to tune. Read this on using a vacuum gauge : http://classicinlines.com/Vacuum.asp
How to read a vacuum gauge: http://www.secondchancegarage.com/public/186.cfm
Please provide more information.
Type: electric choke or manaul?
CFM size or model number: Ex: 1400, 1405, 1406, 1407.......
Type of intake: adaptor under the carb or square bore intake, single or dual plane?
The more information you can provide the better information we can give back.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS |
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Hankster
Senior Member
Posts: 319
Loc: Missouri
Reg: 10-27-02
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07-29-12 09:08 PM - Post#2253540
In response to gchemist
When we redid our 75... used the Edelbrock "Performer" Intake and cam set.. but KEPT the Quadrajet... it keeps going and going..... only thing we did, was to DITCH the "divorced choke", and I fabricated a MANUAL one for it. even tho a QJ's choke pulls off BACKWARDS! LOL
75 C10 Scottsdale 350
93 S10 Blazer TahoeLT 4.3
89 S10 Pick-up 4.3 |
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carbking
Senior Member
Posts: 1151
Loc: Missouri
Reg: 06-14-03
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08-01-12 06:09 PM - Post#2254693
In response to Hankster
Saying that the e-clone and the Carter are the same carburetor is like saying Fords and Chevrolet are the same....after all, both have four wheels!
But in your case, I would highly suggest reading what others have posted in this thread about looking for a factory Q-Jet. Very difficult to beat a Q-Jet on a 350 engine, unless the engine is extremely radical.
Jon.
Good carburetion is fuelish hot air!
The most expensive carburetor you will ever buy.....is the incorrect one you attempt to modify!
If you truly believe "one size fits all", trying walking a mile in your spouse's shoes! |
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models916
Frequent Contributor
Posts: 1875
Age: 62
Loc: Addison, IL
Reg: 05-28-10
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08-02-12 07:16 AM - Post#2254854
In response to carbking
Early style Carter AFB carbs were made by Carter. Later Carter and Edlebrock AFB style carbs were the same. Both made in Italy by Weber. The Carter is no longer made. Replacement parts will fit both. Edlebrock also owns the license to the Q-jet, don't know where they are made. GM no longer manufactures them.
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carbking
Senior Member
Posts: 1151
Loc: Missouri
Reg: 06-14-03
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08-02-12 05:34 PM - Post#2255098
In response to models916
Early style Carter AFB carbs were made by Carter. Later Carter and Edlebrock AFB style carbs were the same. Both made in Italy by Weber. The Carter is no longer made. Replacement parts will fit both. Edlebrock also owns the license to the Q-jet, don't know where they are made. GM no longer manufactures them.
Really not trying to be argumentative, rather to impart information.
First, Carter made 505 different model AFB carburetors; before the takeover by Federal Mogul around 1985.
Federal Mogul redesigned the AFB to allow it to be made less expensive, thereby making it more competitive with Holley in initial pricing. Corners were cut to achieve the pricing goals.
Federal Mogul sublet the production of the "new" AFB to Carter-Weber, in the Southeastern part of the USA. Carter Weber became Weber USA. This company was never Weber of Italy. The original offering of the AFB by Federal Mogul still carried the Carter name and base number, but the suffix changed. Additional models were added.
Even these clones carried a different calibration (primarily in the air bleeds, bypasses, and restrictors in the primary venturi clusters) than the other clones.
After Federal Mogul sold the rights to the 9000 series aftermarket carbs, I lost track of what happened then.
As to interchangability of parts......be VERY cautious. As an example, Carter produced 365 DIFFERENT step-up rods in 19 DIFFERENT profiles. Thus, while it is conceivable that the edelbrock rods may interchange with one of the profiles; they obviously will not interchange with the other 18 profiles. By profile, I am referring to the base format of the rod. Typically, the AFB rods would be either 2, 3, or 4 step, sometimes with a transition taper between steps, sometimes with none. The length of the steps would vary.
There are many other differences from the FM clones to the original Carter.
Jon.
Good carburetion is fuelish hot air!
The most expensive carburetor you will ever buy.....is the incorrect one you attempt to modify!
If you truly believe "one size fits all", trying walking a mile in your spouse's shoes! |
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MikeB
Senior Member
Posts: 9388
Loc: Plano, TX
Reg: 08-28-03
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08-02-12 07:09 PM - Post#2255135
In response to carbking
Jon, Thanks for sharing your years of experience here. One of these days, I'm going to find a OE type AFB from a manual trans 300 hp 327, assuming it can be restored to original condition. Although I've had pretty good luck with Edelbrock and older design Holley carbs on mild performance engines, I'd like to play with the real thing.
Real Hot Rods have a Clutch!
1955 210 2dr: 327, Brodix IK180 heads, Jones cam, Muncie M20, Wilwood front brakes
1969 C-10 pickup: 350, TH350
My car pictures
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models916
Frequent Contributor
Posts: 1875
Age: 62
Loc: Addison, IL
Reg: 05-28-10
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08-03-12 08:14 AM - Post#2255296
In response to carbking
Yep, I know that. Not sure why I was thinking Italy?. Early 3 step needles will work in the newer carbs, but you won't be able to dial it in without an AF ratio gauge or a dyno. Edlebrocks tuning guide is really pretty helpful for tuning the different models.
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carbking
Senior Member
Posts: 1151
Loc: Missouri
Reg: 06-14-03
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08-03-12 12:47 PM - Post#2255382
In response to models916
We kind of got off topic a wee bit.
To the original poster: I would suggest you at least consider looking at a Q-Jet.
MikeB - when looking at an original AFB, the number you would want if a show vehicle depends on the year. The number you want if it is a driver (for a stick car) would be 3721sb. 3721s, and 3721sa would also suffice, but the 3721sb was the last (and best) calibration.
Two items to consider on this carb:
(1) Carter continued to produce this unit through the mid-1970's, and it was the unit of choice for dual quad application. MANY are missing the choke assembly which happens to be unique. Don't buy one missing the choke unless you are knowingly buying it for parts only.
(2) This applies to all Carter AFB's but the ones produced for Chevrolet in particular: The section of the curvature of the throttle bore that is machined for the idle mixture control screw port is thin. Carter used a steel idle mixture control screw, and over the years Dr. Goodpliers (the evil twin of Mr. Goodwrench) has applied sufficient force on the idle mixture screws to crack (or even break) the casting in this locality. While in the case of extremely rare units (Pontiac Super Duty or NASCAR Chevrolet, etc.) the entire area may be filled with aluminum and then remachined, this is a costly repair. Generally, if inspection shows this defect, the unit becomes a parts carburetor. Simply invert the carburetor at the swap meet and look at this area.
Jon.
Good carburetion is fuelish hot air!
The most expensive carburetor you will ever buy.....is the incorrect one you attempt to modify!
If you truly believe "one size fits all", trying walking a mile in your spouse's shoes! |
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