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Technical Early 331 Hemi Oil Pump Options

Discussion in 'Traditional Hot Rods' started by ace high, Jan 9, 2018.

  1. ace high
    Joined: Dec 15, 2007
    Posts: 199

    ace high
    Member

    Need opinion about choice of Early Hemi oil pump for 1953 Chrysler 331.
    Choice #1 -- Rebuild original pump assuming housing is in good shape.
    Choice #2 -- 340 oil pump with adapter from Hot Heads
    Choice #3 -- 392 oil pump with modified rear main bearing cap
     
  2. Contact Gary=73RR
     
  3. i have used the hh pump the titan and missile pumps with good results. it depends on what you want to do with this engine.
     
  4. ace high
    Joined: Dec 15, 2007
    Posts: 199

    ace high
    Member

    Old school Street hot rod
     
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  5. Hombre
    Joined: Aug 22, 2008
    Posts: 574

    Hombre
    ALLIANCE MEMBER

    Nothing at all wrong with the 340 pump from Hot Heads. This is a simple swap and works very well.
     
    foolthrottle likes this.
  6. ace high
    Joined: Dec 15, 2007
    Posts: 199

    ace high
    Member

    Does it use the stock intermediate drive shaft ?
     
  7. Hombre
    Joined: Aug 22, 2008
    Posts: 574

    Hombre
    ALLIANCE MEMBER

  8. Lucky667
    Joined: Dec 3, 2008
    Posts: 2,229

    Lucky667
    ALLIANCE MEMBER
    from TX

    I realize this thread is over 10 months old. Before you make any decision, You really need to read the oil section in Hemi Tech here on the HAMB. There are some different opinions about Hemi oil pumps that have NOT been covered on this page.
     
  9. zeph4057k
    Joined: Nov 28, 2011
    Posts: 465

    zeph4057k
    Member

    we put a 340 small blk Chrysler pump in our engine masters engine. it revved to 7000 rpms (required) and put out 660 h.p. with a 1050 cfm holley. it's a bored and stroked 1956 354 to a 396 cubic inch. the pump works great ! we made our own adapter, but hot heads is good, just a little pricey. make sure you disassemble the entire rocker shafts and CLEAN them super good if using the originals.
     
    oj likes this.
  10. zeph4057k
    Joined: Nov 28, 2011
    Posts: 465

    zeph4057k
    Member

    you can use the stock shaft that goes to the distributor, the after market ones are a little short and can lift up off the male end of the cam gear and you will lose oil pressure. it happened to us.
     
  11. Lucky667
    Joined: Dec 3, 2008
    Posts: 2,229

    Lucky667
    ALLIANCE MEMBER
    from TX

    First, I don't want to say anything negative about anyone. If you are in the market to buy an oil pump for a Hemi read, "HEMI Tech: Oil systems- filters, pumps, pans." It is here on the HAMB. I've read all of it several times, Page #4, Post #99 really got my attention. Decide for yourself, . . . My choice, original pump, if it's useable or a new M50 with the rear main cap modified. There are two members here on the HAMB that do the main cap modification, they are 73RR and TR Waters.
     
  12. AndersF
    Joined: Feb 16, 2013
    Posts: 568

    AndersF
    ALLIANCE MEMBER

    I did not had any luck with my aftermarket oilpump in my dodge 53.
    Allmost cost me my new restored engine.
    Put back the stock one and never looked back.
     
  13. oj
    Joined: Jul 27, 2008
    Posts: 5,793

    oj
    ALLIANCE MEMBER

    I just ordered the M50 for my 354, Gary said he had posted how to modify the rear cap so we'll see how difficult it is.
     
    Lucky667 and lothiandon1940 like this.
  14. zeph4057k
    Joined: Nov 28, 2011
    Posts: 465

    zeph4057k
    Member

    ive been running the 340 small block pump in all my hemis (4), drag racing, street, haven't had one problem. good luck out there hemi guys !
     

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