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#1
06-03-2020, 08:33 AM
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QJet pump spacer?
Ran into this on a 1975 spec Qjet, on an oldsmobile. I've been into a whole bunch of QuadraJets over the years, never seen this. What purpose would this serve, other than to decrease the volume available?
There are two pieces, a larger one, then basically a thin one that is on top of that one. Both aluminum. I don't recall seeing it in Cliffs book, although I don't have it handy at the moment. The angle of the pic makes the one from Cliff's kit (in the rear) look shorter. Optical illusion.
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Clutch Guys Matter _______________________________________ 53 Studebaker, 400P/th400/9" 64 F-85 72 4-4-2 Mondello's VO Twister II 84 Hurst/Olds #2449 87 Cutlass Salon 54 Olds 88 sedan |
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#2
06-04-2020, 01:45 AM
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I've never seen that and I'm pretty certain it's not in Cliff's book. Wouldn't that have the opposite effect that you'd want in a performance setup?
Shortens the stroke and reduces the 'shot' it would seem to me.
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Greg Reid Palmetto, Georgia |
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#3
06-04-2020, 02:11 AM
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I can't think of any GOOD reason to use a spacer like that
Less gas in the pump well = less ability to overcome momentary leanness when you stomp on it = lower performance/stalling/hesitation.
Kind of like the reason you'd swap out a 30cc pump on a Holley to the 50cc pump - to go faster! But this would have been in reverse........to go slower (?). My first thought was that it might have been used to keep the pump cup below the opening in the pump well that lets it share fuel with the fuel bowl (like a crutch to allow use of the wrong pump assembly). Or maybe it's some hokey 'gas saver' deal. It's interesting nonetheless. |
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#4
06-04-2020, 06:15 AM
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It appears to be a spacer / adapter / volume reducer.
If you look close the amount of travel available under where the spring rides is the same, so I think this allows the use of the type of Carb air horn that has a deep hole machined in to to locate the pump.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#5
06-10-2020, 10:34 AM
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Quick update, I put the carb back together without this spacer BS, and put the carb on the car. It does absolutely fine, and once again - a kit from Cliffs is the way to go.
For being an oversmogged 1975 rolling CF of internal combustion, it does just fine from what I can see. I will add the spacers to my "WTF" can, just like the tire shop guys have... of things they've taken out of tires.
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Clutch Guys Matter _______________________________________ 53 Studebaker, 400P/th400/9" 64 F-85 72 4-4-2 Mondello's VO Twister II 84 Hurst/Olds #2449 87 Cutlass Salon 54 Olds 88 sedan |
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#6
06-10-2020, 11:05 AM
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I think the spacer may be someone's home made attempt to improve something, they know nothing about.
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1977 Black Trans Am 180 HP Auto, essentially base model T/A. I'm the original owner, purchased May 7, 1977. Shut it off Shut it off Buddy, I just shut your Prius down... 
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