1967 gs 400 Q jet return spring

Discussion in 'The Venerable Q-Jet' started by jonmil, Jan 16, 2019.

  1. jonmil

    jonmil Well-Known Member

    Can anyone tell me if the GS 400 used a dual carburetor return spring set up. I know one spring attaches to the firewall bracket and I've seen some cars with a return spring coming from a clip on the intake manifold. Wondering what is correct because I'm missing parts..
     
  2. ravensbud

    ravensbud Silver Level contributor

    The ‘67 only came with the firewall spring but a good idea to install an aftermarket second spring just in case. Not sure about the later years but likely the same.
     
  3. Cliff R

    Cliff R Well-Known Member

    The factory went to double spring arrangements at some point as they most likely killed a few families when the single spring set-up broke and the engine went to WOT!

    Same with rubber fuel lines/clamps on the pressure side of fuel pumps. That deal went away as well, and is a really BAD idea. Even so you see hundreds of cars at cruise-ins and other local events with cut metal fuel lines and generous amounts of rubber hose running around to the fuel inlet on their Edelbrock Performer AFB clone.

    99 percent of the time they just took a tubing cutter to the stock metal fuel line and didn't even bother to put a "bulge" on it to keep the fuel line from slipping off if they hit a big bump or got into a fender bender. Very dangerous stuff to say the least, and IF you are running rubber hose on the pressure side of you fuel pump, check it frequently (ethanol is very hard on rubber), make sure there are "bulges" so the clamps keep the hose from slipping, etc......Cliff
     
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  4. BUQUICK

    BUQUICK I'm your huckleberry.


    I agree with Cam that the '67 only had the single spring on the firewall. I have added a second spring to my '67 by using an intake bracket from a later 455.
     
  5. Chi-Town67

    Chi-Town67 Gold Level Contributor

    I've done the same on mine. I used a light pull spring so the pedal is not too hard to push.

    2012-31-8 007.JPG
     
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  6. Ziggy

    Ziggy Well-Known Member

    When I did my 67, I found a spring that fit inside the original and both are installed in the original location. That gives me redundancy and original appearance.
     
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  7. BUQUICK

    BUQUICK I'm your huckleberry.

    Nick mine is identical to yours, except yours looks much, much nicer than mine. :)

    I added the second spring not only for my own safety but also because my local drag strip requires two visible return springs as part of their safety inspection.
     
  8. Cliff R

    Cliff R Well-Known Member

    "I added the second spring not only for my own safety but also because my local drag strip requires two visible return springs as part of their safety inspection."

    and for good reason!.......Cliff
     
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  9. GranSportSedan

    GranSportSedan Puppet dictator, wife has all power

    the second spring as seen in Nick's picture is a good idea just in case the throttle linkage comes off the carb connecting point. that way there is still a return spring pulling the carb closed.
     
  10. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Would any of you guys happen to have a part number or some dimensions for the firewall spring? I would assume for the microswitch to function properly, return springs on the intake alone will not do the trick.
     
  11. jonmil

    jonmil Well-Known Member

    I can upload a picture of the firewall spring but I don't have any source for part numbers. I can tell you that the spring does not affect the micro switch. Spring located on intake or firewall micro switch will function the same. The throttle arm just needs to move forward to activate it
     
  12. jonmil

    jonmil Well-Known Member

    This is the firewall spring on my 67 gs400. It's 6" total length and the spring is about the size of a 20190222_151639.jpg 20190222_151547.jpg 7/16 deep well socket
     
  13. DauntlessSB92

    DauntlessSB92 Addicted to Buick

    Perfect! Thank you for the pictures, I am sure I can find something close to that.
     

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