Which Edelbrock carburators to install

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500, 472, 425, 368 Discussion, Which Edelbrock carburators to install in Cadillac Engine Discussion; I have a 68 cadillac deville with a 472 and I was wondering if I decided to change the carburator, ...
  1. #1
    dbird35 is offline Cadillac Owners Member
    Automobile(s): 1968
    Join Date
    Jul 2009

    Which Edelbrock carburators to install

    I have a 68 cadillac deville with a 472 and I was wondering if I decided to change the carburator, which Edelbrock carburator should I put in it? I know this maybe a simple answer but I really don't know.....thanks in advance

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  3. #2
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 Fleetwood FWD
    Join Date
    Mar 2009

    Re: Which Edelbrock carburators to install

    I'm Not familiar with your year. What is the original carb?? I'm on several other forums, and folks have been having problems with the Edlebrock carbs, but I don't know which models. The original carb on some 60s cars was a Carter AFB, which is a very good, simple carb. Edlebrock makes a copy of that carb. They also make a Quadra-jet style carb. I haven't ever used their carbs.
    The question is, why do you want to change the carb??

  4. #3
    cadillac_al is offline Cadillac Owners Connoisseur
    Automobile(s): 70 Deville 77 Fleet 78 Seville 92 Deville 03 Deville
    Join Date
    Feb 2007

    Re: Which Edelbrock carburators to install

    No other carb will outperform your original Rochester Quadrajet. I would have the original rebuilt.

  5. #4
    deVille33 is offline Cadillac Owners Connoisseur
    Automobile(s): 1977 Coupe (blue), 1977 Coupe (yellow), 1977 Coupe (green)
    Join Date
    Mar 2006
    Western Massachusetts

    Re: Which Edelbrock carburators to install

    I agree with Al. Your Rochester Quad can flow at 800 cfms and has several advantages over other carbs. The biggest problem is throttle shaft wear. A good carb shop should be able to correct this, if tbat is a problem.

  6. #5
    Submariner409's Avatar
    Submariner409 is offline If it won't run, stick on fender vents
    Automobile(s): 2002.5 F55 STS - 66500 miles, 2014 Explorer XLT FWD
    Join Date
    Feb 2006
    MD Eastern Shore, Kent Island

    Re: Which Edelbrock carburators to install

    Yep - an OEM 750-800 QJ will supply over 700 cubic inches. That's why they have secondary air valves - so you won't "over carburete" the engine.

    We use electric choke QJ's on our marine work and race Olds 455's, most done by JET in California, and not expensive.

    Get to www.jetchip.com and look at their site and give them a phone call. They're very helpful and will build a QJ for any application.

    I'm not knocking Vic Edelbrock's work - we use a ton of his parts - but JET will build a carb for your engine.

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