| Re: Is quadrajet carb with altitude compensation still available ?? [message #172668 is a reply to message #172649] |
Fri, 08 June 2012 22:12   |
Carl S.
Messages: 4186
Registered: January 2009
Location: Tucson, AZ.
Karma:
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Senior Member |
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Steve and Debbie,
I wouldn't worry about the elevation. I have driven our coach from sea level to just under 8,000 feet with the stock Q-jet. The only issue I have encountered was vapor lock going from low to high. Generally the temps are lower at higher altitudes and the vapor lock has gone away, at least in my case. I have gradually been modifying the coach for use in the West and currently have a 3.70 limited slip final drive, an MSD dash mounted timing control (so I can add advance at higher elevations), and six wheel disc brakes with reaction arms (so I can stop). But your coach will do fine without all that stuff.
I agree that an electric fuel pump is in order to combat the vapor lock. I have one that is set up the same as Rob M.'s is set up, as a pusher wired to the tank switching valve. Even with that, I had severe vapor lock on a trip last July, climbing out of the Phoenix area on I-17, toward Flagstaff. Once I got up a bit higher, the coach ran fine. Fuel injection and a computer controlled distributor would almost certainly take care of most driveability issues. I have always had adequate power at high elevations.
Carl Stouffer
'75 ex Palm Beach
Tucson, AZ.
Chuck Aulgur Reaction Arm Disc Brakes, Quadrabags, 3.70 LSD final drive, Lenzi knuckles/hubs, Dodge Truck 16" X 8" front wheels, Rear American Eagles, Solar battery charging. GMCSJ and GMCMI member
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