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Messages - Jerry@CHP

#1
General Discussion / AC Fuel Pump Rebuilds
April 17, 2025, 05:04:03 PM
For everyone on CRG, I just posted this on Facebook.  Just an FYI for you. 

For all the gear heads out there, had an unfortunate issue pop up yesterday with the Green monsta.  Started it up and pulled it into the shop only to find gas hemorrhaging through the vent tube and down into the venturi's. Took it all apart, cleaned the needle and seat installed a new power valve, put it back together same problem. Installed another carburetor and had the same issue. Called a friend and he told me it could be an issue with the calibration of the fuel pump. I pulled the pump off and installed a good used pump on the Shelf and the problem went away. I don't know who is restoring or rebuilding these AC fuel pumps but evidently the pump on my car worked well for two years and then all of a sudden the calibration went South. Just some food for thought if you're having your original AC pump rebuilt. In my stock Eliminator race car I run 7 lb of fuel pressure and that's no problem for a Holley carburetor. So for this mechanical pump to fail it had to be pushing anywhere between 10 to 12 lbs of fuel pressure to the carburetor. For many car guys who don't work on their own stuff just be warned that this problem could crop up if you've had an original AC pump rebuilt.  Notice the two simulated adjusting screws on the back of the pump. Factory pumps are not built like this.
#2
And here's my four page report on the car. 
#3
Next owner, an amazing car with an amazing paperwork file. 
#4
Next owner
#5
Next owner
#6
Next owner
#7
3rd owner
#8
2nd owner
#9
Original owner title
#10
Very cool Yenko parts invoice. 
#11
Yenko Invoice to Craig Chevrolet
#12
Sober Trucking
#13
Shipping docket
#14
Sales Ad, Sept '67
#15
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