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THG
  • r2hud308
    Posts: 34Hitchhiker
    THG
  • Tallent RTallent R
    Posts: 1,574Platinum Member
    I dont claim to be an expert but if you read about the Hudson engineering folks they marched to a different drummer than most . They bought the cheapest lowest grade gas for thier test engines and designed and tuned them to run best on that. Knowing a lot of folks wlould do the same and thats why the car wont ping and knock under load , it just pulls on thru. this may explain something such as what you are seeing,
    Roger
    Retired Tech.
  • Park_WPark_W
    Posts: 2,052Platinum Member
    308, the behavior you describe is not correct for any Hudson I've ever had or worked on, including the '51 Hornet I have now. The vac advance doesn't come in until you're off idle. Maybe you've got a non-original carburetor. One thing that is a bit different from most cars is that the amount of vac advance is quite modest.
  • r2hud308
    Posts: 34Hitchhiker
    All have been stockers Park,you are correct on the amount of advance isnt much, about only 3degrees on most with the pacemakers around 7. I have also been changing that as well to around 10 by trimming metal from advance arm
  • walts garage-53
    Posts: 1,470Platinum Member
    Vacuum advance in all Hudsons is controlled by RPM. The carburetors are for Hudson's only. No advance at idle and advance increases by RPM's. All Hudsons have vacuum ports built in, and if you are drilling to get advance, you do not have a Hudson carb for your year. Spark advance started on Hudson's in 1940. Walt.
  • Jon BJon B
    Posts: 4,764Moderator
    Excuse me....am I missing something here? Are we dealing with a new shorthand? What does "THG" mean?
  • Park_WPark_W
    Posts: 2,052Platinum Member
    Walt means that vacuum advance started in 1940. Mechanical (centrifugal) advance began well before that.
  • 53jetman53jetman
    Posts: 872Platinum Member
    Just what is "THG". I don't do well with sign language.
    Jerry
    email: HudsonJetman@mail.com
    2nd Generation Hud-Nut
    HET Tech Adviser on Hudson Jets 1953 & 1954
    HET Registrar of all Hudson Jets
  • hudsontechhudsontech
    Posts: 4,042Platinum Member
    53jetman - an earlier THG post says The Hudson Garage.

    Hudsonly,
    Alex Burr
    Memphis, TN
    http://www.hetclub.org/
    http://hetclub.org/burr/lithomepage.htm
  • Jon BJon B
    Posts: 4,764Moderator
    ...so how is it that when someone posts "THG" everyone immediately knows he's got a question about pinging and pre-ignition? I need a manual for this new three-letter way of conversing, since I'm a man of few words!
  • r2hud308
    Posts: 34Hitchhiker
    OOPS ! Sorry guys,im new here and tryed editing my post and somehow erased it,heck I dont remember what I posted now,I got all new problems today,
  • SuperDaveSuperDave
    Posts: 2,376Platinum Member
    My '49 262 knocked with too much basic advance.. then it cured it's self when my hearing went south. Joan told me there was a funny noise. I didn't hear it....It's amazing how quiet my new '49 8 is... with my hearing aids turned off.. LOL
  • walts garage-53
    Posts: 1,470Platinum Member
    Don't run it too long with that spark noise as you will burn a hole through one of the pistons/ Good way to ruin a motor. Walt.
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