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Technical 276 DeSoto Hemi question

Discussion in 'The Hokey Ass Message Board' started by Mr.Moose, Jul 19, 2022.

  1. Mr.Moose
    Joined: Dec 1, 2010
    Posts: 13

    Mr.Moose
    Member
    from Michigan

    Hi. It’s been a long while since I’ve posted. Looks like 2011!!
    I’m rebuilding my 276 Hemi.
    I bought the HotHeads timing cover, I’m trying to use the stock cam and timing gear.
    I know that I have to trim the snout on my cam, does anyone know or have access to specs and/or directions for doing this??

    I contacted HotHeads and Racer Brown. I wasn’t able to get the info I need. I actually already sent this cam to RacerBrown to get re-ground before deciding to go with the aftermarket cover. And it seems like he and HotHeads suggest going with the Chrysler 318 cam and gear. But it seems like I should be able to make this stock one work.

    I’ve included pics because everyone loves pics. The engine. And my car. 6EA6F142-2FDB-4849-8EBF-78AD97932EC6.jpeg DE58F6AD-1588-46CD-B26D-32128E4B54BA.jpeg
     

    Attached Files:

    Budget36 likes this.
  2. The stock set is very thick,,,,,once you machine the cam snout,,,,,,and drill and tap the cam,,,,,,it won’t clear the timing cover .
    The SBM timing set is what you use then .

    Tommy
     
    SEAAIRE354 likes this.
  3. Mr.Moose
    Joined: Dec 1, 2010
    Posts: 13

    Mr.Moose
    Member
    from Michigan

    SBM? It Looks like there are two options on Hot Heads site. Is it one of those or something different?
     
  4. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    A few thoughts......
    The cam snout is cut off just ahead of where the sprocket sits. The actual measurement is determined by how you decide to retain the sprocket.
    You CANNOT use an everyday LA chain/sprocket set. The location where the stock sprocket sits is 1.00" diameter and the LA cam, at that same point, is 1.060" .
    If you are a creative machinist you can turn down the 276 snout to about .800" and press on a 1.06" bushing and cut a new key pocket....but best plan ahead to figure out how to maintain timing and keyway location.
    The other option is to use the stock link belt sprocket and devise a cam drive ***embly and a retainer.
    D&T the snout for a 7/16 bolt.
    If this does not clear the alum cover then you have a cover problem, not a sprocket problem.

    About 30 years ago I modified a quan***y of cams and roller sprockets by putting a bushing in the sprocket. Labour intensive to be sure but they worked out very well. I still have a few of the bushings if you want to go that route but, again, maintaining timing is critical so installing the bushing correctly is also critical.....

    Need to add...the oem S239 cam sprocket is getting very hard to find and when available can be expensive. If yours is half-way decent don't throw it away.
     
  5. Mr Moose ,
    Sorry about the confusion on my part,,,,I left out the part about needing the gear bushed,,,,forgive me .
    I think the Hot Heads unit is a Milodon piece,,,,,,and I think it is for an early Chrysler.
    Credit to Gary for catching my error .
    Forgive me Gary for looking so stupid,,,,,I’ve been planning my mothers funeral and wasn’t thinking clearly .
    After I posted and left the house,,,,I knew something was wrong,,,,,but I couldn’t wrap my head around it,,,,,sorry .

    Tommy
     
  6. 73RR
    Joined: Jan 29, 2007
    Posts: 7,342

    73RR
    Member

    So sorry to hear of your loss. :(
     
    Desoto291Hemi likes this.

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