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Dave39MD

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Posts posted by Dave39MD

  1. I am not sure about the cross, my AC book shows RJ12C crossing to C49. C49 would be beyond the heat range recommended by the manufacturer. What exactly on the plug is 3X times longer?

     

    Hot plugs, like a 49, have been know to melt holes in pistons.

     

    I have more books and will check further but I would use what the manufacturer recommended.

     

    Dave 

  2. Measuring from the base where the gasket sits on the plug to the tip;

    Green Stripe made by AC

    R46 - 2.236

    44 (should be the same as 46) - 2.236

    Currently available ACDelco

    R45 - 2.496

    Vintage of the car AC

    46 - 2.202

     

    You can get the current ACDelco at most any parts outlet. The green stripe plugs seem common on ebay, the stripes are around the insulator.

     

    Hope this helps

     

     

    • Like 1
  3. The Cardone fuel pumps appear to be using the AC numbering system. Just drop the number before the dash and you have the AC number. One that stuck out was 40987 which was a very popular Chevy v 8 pump. If you don't have an AC catalog make a list post or pm me the list I can try and give general applications as time permits. Delco rebuilt carbs were discontinued in the early eighties , I will look to see if I saved a catalog.

     

    Dave

    • Like 1
  4. I should add it normally runs at 160 and when I say hot it is up around 170 to 180. I did do a search and found the heat riser can be a problem but would it run well at times and then not with pin holes in the heat riser tubes?

     

    Thanks

     

    Dave

  5. My new to me 31 , 60 series  Buick 66S, runs great when the outside temp is around 60 and I make no stops. If I stop to get gas and start out again it starts to backfire thru the carb. If I pull the choke out about 1/2 of an inch it smooth's out and runs fine. I can slowly push the choke back in without problems. My guess is it is something heat related. I would appreciate any suggestions.

     

    Thanks

     

    Dave

  6. The serial number plate on a 39 Master Deluxe is mounted the cowl , passenger side, under the hood (not on the firewall). The Fisher Body plate is in the same location.

     

    More info on the engine number, looking at the engine-fuel pump/distributor side, the stamping is just left  of the distributor on a raised pad.

     

    Dave

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