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part cross list number for a vacuum advance --54 Twin-H?
  • JPJP
    Posts: 93Expert Adviser
    Does anyone out there have a cross list parts number for a vacuum advance for this car?

    Thanks much appreciated in "advance",

    JP
  • Tallent RTallent R
    Posts: 1,577Platinum Member
    VC850 Echlin (NAPA) is what my old swap book shows for 55-56 Hudson 6 cylinder. It does not say wheather its 202 or 308 . Or if it fits both so thats all I found ,Its also older info but better than nothing,
    Roger
    Retired Tech.
  • 48Sed
    Posts: 90Hitchhiker
    Roger
    What about a cross for a 48 8 dist vac adv 1GT 4204A?
    Thanks
  • Tallent RTallent R
    Posts: 1,577Platinum Member
    That one referance for 55-56 is the only one listed. I know the earlier engines used different points but not sure about the vacume unit. The regular Hudson parts book does not list that as a seperate part.
    Roger
    Retired Tech.
  • Ken U-Tx
    Posts: 1,110Platinum Member
    I think the Autolite part number was 2023 R or 2023RG, I would have to check the box that it came in, next time I am at my friend's place, that is, if he kept the box. It came without the vacuum pipe fitting or springs, shims......I had to transfer them and check the vacuum advance in degrees for Inches of Hg vacuum as given in the Hudson Mechanical Procedures book.
  • Ken U-Tx
    Posts: 1,110Platinum Member
    That Autolite number was for the IAT distributor NOT the IGT.
  • Ken U-Tx
    Posts: 1,110Platinum Member
    Now I think it was 2023RD
  • Oldfarmer1947gmailcomOldfarmer1947gmailcom
    Posts: 125Hitchhiker
    For those who are not having any luck with finding a replacement vacuum advance chamber you can have them rebuilt. Today I spoke with Al Saffrahn, well known Hudson mechanical wizard, about available Hudson applicable replacement vacuum chambers and he surprised me stating; he is now having OEM canisters rebuilt with modern diaghram materials. Note he does not stock these items and sends them out to a repair shop. Contact Al @ (five-two-zero) Twentynine eleven or AZal_saffrahn@q.com. Remove the AZ from the email address. You will need a core chamber to effect the repair.

    Hudson used IAT2023RD vacuum chambers for 232 and 262 engines and the IAT2023RN for the 308. The amount of inital advance is identified on the chamber arm. The attached picture is of an arm on a IAT2023LE and it is marked "5". Hornet engines (308) will be marked "3.5".

    Hope this will help .... if you drive your Hudson and have a non functioning vacuum chamber, you will see a measurable increase in mileage with a properly functioning vacuum advance.
    5.jpg
    640 x 480 - 20K
    Oldfarmer1947@gmail.com
  • JPJP
    Posts: 93Expert Adviser
    Thanks for the input--from all of you. I appreciate it very much. I am going to see about getting one rebuilt. I do wonder if there are vacuum advances from other makes that might work with the Autolite distributor on the 308.

    JP
  • barrysweet52barrysweet52
    Posts: 273Gold Member
    Do you still need a vacuum advance with pertronics? Thanks for a reply. Barry
  • J SpencerJ Spencer
    Posts: 367Gold Member
    Yes, the vacuum advance would still apply as the function of the vacuum advance is to advance ignition timing at part throttle/cruising speeds for better fuel mileage. Contrary to some peoples thinking it does not advance the timing under acceleration. It retards ---when you accelerate the vacuum decreases and the timing retards, other wise the engine would would 'spark knock' from too much timing.

    In a modern day vehicle among other parameters the function of a knock sensor is when it senses vibration caused by 'spark knock' is to 'tell' the the computer to retard timing to prevent 'spark knock'

    Jim Spencer
    WNY/Ontario chapter

  • walts garage-53
    Posts: 1,470Platinum Member
    No other spark advance has the same total as Hudson. I modified a 1972 AMC electronic distributor to use in my Hudson and had to make sure it only gave 9 degree centrifugal advance and 4 degrees vacuum advance. Original they are 16 and 12. Took 3 days on a SUN MACHINE to get my setting. I got better gas mileage and power. I use a jacob brain box with it. Fully Automatic and had to get KJB plugs as Champion would burn away. Walt.
  • Ken U-Tx
    Posts: 1,110Platinum Member
    Walt, can you supply another AMC unit set to the correct advance curve for my '53?
  • walts garage-53
    Posts: 1,470Platinum Member
    What distributor are you using? Will not work on a Hudson distributor. I meant to say 1982 but 7 got in the way. The best part on my AMC distributor, it takes all Ford parts and they are still available, Motorcraft. After 100,000 miles I bought a Ford distributor, rebuilt, and just changed all parts inside from one to the other. Only cost $42.00. Let me know the distributor you are using? Walt.
  • Ken U-Tx
    Posts: 1,110Platinum Member
    Walt, I am currently using an old Mallory dual Point YC distributor, but would like to try one of your AMC / Ford distributors, if you can build another one to Hudson advance curve specs.
  • GrimGreaserGrimGreaser
    Posts: 541Platinum Member
    This looks like it may, with a little work, be made to work with our Autolite distributors. It's a replacement canister for their billet big block Mopar distributor. Don't take my word though, just thought I would throw it out there...

    Adjustable Vacuum Canister:
    http://www.summitracing.com/parts/sum-850530
    Six in a row makes it GO!
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