What carburetor...

Discussion in ''Da Nailhead' started by 1966buickgs, Jun 18, 2016.

  1. 1966buickgs

    1966buickgs 1966buickgs

    Should I buy a remaned stock carter for my rebuilt stock 401 bored 60. Or should I put aftermarket Edelbrock 750 carb on it or some other carb. Let me know,don't wanna waste my money an get something that doesn't work properly. I know how to fix the linkage to work on the Edelbrock now but still don't know if that would be the right choice cfm wise an I've heard I might have to recurve distributor too work right with the 750. I want the most h.p. I can get, don't really care about gas mileage. If the rebuilt carter is a better idea though I will stick with it.
    Let me know, thank you. Oh an I can't afford efi right now.
     
  2. gsgtx

    gsgtx Silver Level contributor

    i put a 750 edelbrock and a open air cleaner on a stock 1966 gs 401 with 2.93 gears. picked up 2.5-3 tents. if i remember went one size smaller jets primary and secondary.
     
  3. telriv

    telriv Well-Known Member

    If worse came to worse you could change the primary throttle shafts & completely eliminate the need for adapters & the related problems they can cause. Now ALL your linage problems will be a thing of the past. A PROPER distributor re-curve is one of the MOST beneficial (besides the size of the carb) things that can be done to a "Nail".
    I do re-curving & convert to a one wire electronic ignition if wanted.


    Tom T.
     
  4. 1966buickgs

    1966buickgs 1966buickgs

    How do I eliminate the primary throttle shafts, an get the carb to work properly? Oh an I have here also an air fuel ratio gauge is a good idea an if so what's the most economical one to get so I have security of knowing I'm running good an not to lean. Thank you
     
  5. telriv

    telriv Well-Known Member

    You have to remove the throttle shaft from the original & install it in the Edelbrock carb. If you don't know what your doing you can cause yourself much grief. Do a search on how it's done. It's really not that hard. The original jetting will be TOO RICH. But won't hurt anything until you can get it dialed in.
     
  6. 1966buickgs

    1966buickgs 1966buickgs

    Got a 750 edelbrock on the way, do you have that info with some pics on how to do the throtle swap from the carter to the new edelbrock. I did a search an have not found it yet,thanks.
     
  7. Bigpig455

    Bigpig455 Fastest of the slow....

    Have Tommy do your distributor.....he's done all mine, and each time it really woke the car up.
     
  8. 64 wildcat conv

    64 wildcat conv Silver Level contributor

    1966buickgs: search my threads and you'll find the jetting specs I used when I installed a 750 CFM Edelbrock on my stock '64 401. I ended up going two stages leaner than the out of the box jetting, but I am in the mountains of NC at or above 2000 feet most of the time. In order to get the jets and rods needed I had to buy the Edelbrock jet kit and the rods separately. I'd suggest you do the same so you can swap jets as needed. I ended up using the richest accelerator pump setting.
     
  9. gsgtx

    gsgtx Silver Level contributor

    grind the old one off the buick carb. sorry only one photo came out good.
     

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  10. 1966buickgs

    1966buickgs 1966buickgs

    Thank you all for the help!
     

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