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1928 chevy 4cyl motor

Discussion in 'The Hokey Ass Message Board' started by RedRodder, Apr 7, 2010.

  1. 282doorUK
    Joined: Mar 6, 2015
    Posts: 114

    282doorUK

    Well, finally got tired with trying to get the twin Zeniths set right to get this thing to run better, after messing with varying combinations of them and a few disappointing test runs I finally gave up spent some money bought a brand new Stromberg 81!

    Made up a new manifold to fit, it ran very cold and rough with lots of condensation, most likely cos of the small venturis. So I added a water heated bit underneath and I'm pleased to say it now runs very well now, revs up clean and smartish.

    Need to get it out for another run, but I think it'll be pretty good out of the box.

    I might even re-make the manifold in ally sometime, or maybe wait till I get the motor rebuilt and make a second one for a pair of Stromberg 81s on it!

    DSCF7292.JPG
    DSCF7291.JPG DSCF7300.JPG
     
    Last edited: Jul 27, 2021
    Egor, Papas32, Carter and 3 others like this.
  2. grumpy gaby 2
    Joined: Aug 10, 2019
    Posts: 159

    grumpy gaby 2
    Member

    282door Nice looking manifold! I agree about the water heater! I built a log manifold with two strombergs - but just didn't work the best until I added heat. Runs great!
    Egor, Did not quite catch what you were thinking, but yes All of the original speeders are gone. I was lucky to talk to two of them about 22 years ago, but lost contact before getting enough info. But learned some.
    You two be safe and HAVE FUNN!!! (edited because dumb me got the wrong name! So Sorry 282door!!!
     
    Last edited: Jul 28, 2021
    Egor, 282doorUK and Six Ball like this.
  3. 282DoorUK,

    Which Zenith carbs were you running?
     
  4. 282doorUK
    Joined: Mar 6, 2015
    Posts: 114

    282doorUK

    These old things, I got a bunch free, reckoned they looked vintage enough, so it was worth a try...

    DSCF7239 3.JPG

    With added ice!

    Ice carb .jpeg
     
    Egor, Six Ball and grumpy gaby 2 like this.
  5. 282doorUK
    Joined: Mar 6, 2015
    Posts: 114

    282doorUK

    No need for sorry, but you saved me thinking whether to tell you or not :)

    Do you have a pic of your heated manifold?
     
  6. grumpy gaby 2
    Joined: Aug 10, 2019
    Posts: 159

    grumpy gaby 2
    Member

    282door I tried to zoom in on both of the two pics of that side of the engine, but no go! Will have to go open up the enclosed trailer to get a close up. It was 102F yesterday and they just changed the forecast to 106F for today, so may be a few days.
     
  7. Six Ball
    Joined: Oct 8, 2007
    Posts: 4,176

    Six Ball
    Member
    from Nevada

    It would be interesting to somehow know how many people who don't run heat never see the ice under their hoods. :eek:
     
  8. 282doorUK
    Joined: Mar 6, 2015
    Posts: 114

    282doorUK

    So would I, most factory setups have some form of intake heat, with hot rods it's not seen so much, if ever.
     
    Six Ball likes this.
  9. 282doorUK
    Joined: Mar 6, 2015
    Posts: 114

    282doorUK

    Don't sweat it too much, no rush plenty of time.
     
  10. Egor
    Joined: Sep 1, 2010
    Posts: 73

    Egor
    Member

    I see frost on the mug, but what about it's mate? I don't think it matters unless you start getting icebergs in the venturi, these Chevy heads had the waffle bit in the intake to warm the charge going down the runner. Just wondering
     
    Six Ball likes this.
  11. 282doorUK
    Joined: Mar 6, 2015
    Posts: 114

    282doorUK

    I was experimenting by running it on one carb in that pic, and yes there were icebergs in the carb, the butterfly spindle froze and wouldn't turn.

    I never heard that about the the waffles warming the charge, or any other plausible explanation for having them in there, so maybe that's it.
     
    Egor and Six Ball like this.

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