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Technical Rochester fuel injector on a flathead (scale model research)

Discussion in 'Traditional Hot Rods' started by s.e.charles, Mar 30, 2026.

  1. s.e.charles
    Joined: Apr 25, 2018
    Posts: 580

    s.e.charles

    Q: is it plausible a Rochester fuel injector* could be adapted to a flathead engine given the correct intake manifold w/ adapter plate?

    and follow up: is there a limit to the carburetion which said ***embly could be compatible?

    thanks

    *corrected the ***le
     
    Last edited: Apr 5, 2026 at 2:22 AM
  2. mohr hp
    Joined: Nov 18, 2009
    Posts: 1,726

    mohr hp
    Member
    from Georgia

    Show a picture of a "Rochester blower".
     
  3. Hutkikz
    Joined: Oct 15, 2011
    Posts: 223

    Hutkikz
    Member

    Is it possible your refering to a Rochester fuel injection system?
    [​IMG]
     
  4. Likely he means a GM Detroit Diesel supercharger.

    upload_2026-3-31_9-23-51.jpeg

    upload_2026-3-31_9-22-11.jpeg upload_2026-3-31_9-22-46.jpeg upload_2026-3-31_9-23-6.png upload_2026-3-31_9-25-5.jpeg
     
    s.e.charles and Johnny Gee like this.
  5. s.e.charles
    Joined: Apr 25, 2018
    Posts: 580

    s.e.charles

    yes; i told you guys "i didn't know".

    so how does this work and could it at the farthest reaches of the imagination be coupled with a flathead engine? cl***ic JC Whitney adapter plate?
    please remember: this would be going on a scale model so "cost would be no object" in 1:25 scale.
    i know i'll need to do more research, but i always start my day with HAMB.

    and a BIG 'Thank You' to Hutkikz for posting this picture for me and clarifying what i was trying to say.
     
  6. willys36
    Joined: May 6, 2006
    Posts: 3,324

    willys36
    Member

    I'm interested in knowing how the Rochester works inside. Have seen them for 60 or so years but never knew how they work.
     
    cfmvw likes this.
  7. BJR
    Joined: Mar 11, 2005
    Posts: 11,640

    BJR
    Member

    That is Rochester fuel injection, not a blower.
     
    s.e.charles likes this.
  8. s.e.charles
    Joined: Apr 25, 2018
    Posts: 580

    s.e.charles

    once Hutkikz told what the dang thing is, i was off on a mission. maybe some of this will help us both:
    https://www.chevy********.com/tech-...n-chevrolets-rochester-ramjet-fuel-injection/
    https://autohistorypreservationsociety.org/1960-1965-rochester-fuel-injection-exposed/
    and my go-to {after HAMB & Ford Barn]
    https://en.wikipedia.org/wiki/Rochester_Ramjet

    that's as far as i've gotten today, but will dig deeper.

    if you show me yours, i'll show you mine.
     
    3blapcam likes this.

  9. The center is just an air plenum for mixing the air/fuel mixture, the driver side mounts an air meter. The p*** side is the fuel metering valve.
     
    s.e.charles likes this.
  10. willys36
    Joined: May 6, 2006
    Posts: 3,324

    willys36
    Member

    Got it! positive displacement gear fuel pump feeding simple port injection. Center dome is again simple tech ~13" velocity stacks for boost at about 3000rpm with sympathetic boost at 1500rpm. A version of this;

    [​IMG]

    I built a 'ram' manifold for my hemi when in high school. Designed it in physics cl***! Just carbureted, was good at WOT but really boggy as you night expect on part throttle. Don't WOT on city streets much!!
    Old days 2.jpg
     
    s.e.charles likes this.
  11. s.e.charles
    Joined: Apr 25, 2018
    Posts: 580

    s.e.charles

    willys36 likes this.

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