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Technical Oil Pressure on 261 Stovebolt

Discussion in 'Traditional Hot Rods' started by Flo_Berlin, Jan 7, 2014.

  1. Flo_Berlin
    Joined: Jan 27, 2013
    Posts: 10

    from Germany


    we built a fresh 261 for a friend of mine (48 Chevy 3600). It runs just fine and pulls like a bunch of buffaloes.

    But I am a little worried about oil pressure. This is already a pressure oiler engine (I think a 56 block) which we converted to a full flow oil filter.

    Oil pressure never drops below 15psi in hot idle neither (and idle is Looooow on this one). But it also never goes beyonf 30psi when reving it up. Is that where the pressure relieve spring should be set to? Or is that too weak and we need to shim or replace the spring?

    Oil pressure is measured in the main oil gallery.

  2. Rusty O'Toole
    Joined: Sep 17, 2006
    Posts: 9,524

    Rusty O'Toole

    It sounds good to me. Could be a little bit on the low side but not bad. If it bothers you, you could shim the oil pressure relief spring.
  3. donsz
    Joined: Nov 23, 2010
    Posts: 215


    The 261 is a great engine, good luck! You could check with Tom Langdon on his website. He is most knowledgeable on the Chevy sixes and always willing to help.
  4. Flo_Berlin
    Joined: Jan 27, 2013
    Posts: 10

    from Germany

    thanks, will do

  5. FYI, The new website is
    We had SEVERAL calls today with people looking for the site as the old one no longer exists. Also, his email is Tom does NOT do computers, so he is not on these forums. But, we do have him do his emails ;)
  6. sunbeam
    Joined: Oct 22, 2010
    Posts: 5,222


    Motors manual sez 35 lbs
  7. junkyardjeff
    Joined: Jul 23, 2005
    Posts: 7,909


    The stock gauge in the 48 only goes to 30 so it can not go any further.
  8. George Miller
    Joined: Dec 26, 2008
    Posts: 413

    George Miller
    from NC usa

    Sounds about right to me. That is about what they ran back in the day.
  9. pbr40
    Joined: Aug 10, 2008
    Posts: 808

    from NW Indiana

    Mine runs around 35-40 running down the road I won't worry about it to much

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