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Hot Rods Slow day..Fuel pump hole on SBC

Discussion in 'The Hokey Ass Message Board' started by B.A.KING, Jan 2, 2022.

  1. B.A.KING
    Joined: Apr 6, 2005
    Posts: 3,965

    B.A.KING
    Member

    I thought i had asked this but can't go back and find it. Anyone know what was the last year that G M machined the fuel pump rod hole in SBC.
    I was sure i had asked this before, but can't find info if i did.
     
  2. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,954

    gimpyshotrods
    ALLIANCE MEMBER

    I first saw it gone in 1995, I believe for 1996 production.

    There are fixtures to finish unfinished blocks: http://bhjproducts.com/bhj_content/products/blocktooling/fppr_chs.php
     
    427 sleeper likes this.
  3. B.A.KING
    Joined: Apr 6, 2005
    Posts: 3,965

    B.A.KING
    Member

    Man thats great info right there. solve a lot of problems. Many thanks
     
  4. 40Standard
    Joined: Jul 30, 2005
    Posts: 5,921

    40Standard
    Member
    from Indy

    I got a 350 block 1991 no fuel pump hole
     

  5. The 87 one piece rear main seal TBI motors had no fuel pump hole. So, 87 and up production motors, except obviously GM replacement SBCs for 86 and down.
     
  6. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,954

    gimpyshotrods
    ALLIANCE MEMBER

    IMG_20191219_182436.jpg
    I have a 1989 TBI block, wearing a mechanical fuel pump.
     
    427 sleeper likes this.
  7. Budget36
    Joined: Nov 29, 2014
    Posts: 8,453

    Budget36
    ALLIANCE MEMBER

    I've heard some did and some didn't up into the mid 90's, I have an '89 block with the hole-a TPI engine.
     
    gimpyshotrods likes this.
  8. SEAAIRE354
    Joined: Sep 7, 2015
    Posts: 424

    SEAAIRE354
    Member

    As said 87 was the first year for injection so there was no need. I’ve built a lot of marine engines and there all over the place some have some don’t but I’ve seen them with well into the 90s I have a 2010 marine with the boss cast in place and machined but no hole. Can’t understand why they bother with the boss.
     
  9. gimpyshotrods
    Joined: May 20, 2009
    Posts: 19,954

    gimpyshotrods
    ALLIANCE MEMBER

    The boss is on the mold. The drilled holes for the fasteners, and the drilled and reamed hole for the pushrod are, etc. are part of the finishing process.

    Having them there allows the foundry to have fewer molds, as one block can serve many uses.
     
    427 sleeper likes this.

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