Hi altitude carb at sea level

Discussion in 'Carter' started by gun-G, Feb 6, 2004.

  1. gun-G

    gun-G Long time Buick Nut

    What can I expect when I get a Santa Fe car (7000 ft) here at Sea level? Rough idle? No idle? Won't start? ( 64 Riv with a Carter AFB)Thanks in advance, Steve
     
  2. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

    You can expect leaned out jetting if the carb was calibrated for high altitude. Depending on how lean it is, you might have hesitation, pinging or overheating. Carter sells a strip kit with an assortment of rods and jets. Should be guys on this BB who can steer you in the right direction.
     
  3. gun-G

    gun-G Long time Buick Nut

    OK Larry, thanks...I was wondering if iot would be a problem for the carrier. Once it gets here, it may not even be the right carb, but it's definately a hi-alt carb. Steve
     
  4. BadBrad

    BadBrad Got 4-speed?

    I take mine up to 7,000 feet from near sea level once a year for a show in the mountains 90 miles away. When I get there the car has lost most of its throttle response. I compensate by cranking about 7 degrees of advance in with my MSD timing control. This returns about 40 percent of the response. I also switch to the high altitude choke setting - I've found this choke setting works better at low altitude too so I left it. If I was there for longer than the week I usually spend I'd probably pop open the Q-jet and lean out the primary rods and jets. Based on how fat the car feels I'd probably go 4 steps leaner (68 from 72 for example). On a Q-jet (and I believe a Carter) you must do both jets and rods so as to maintain your part-throttle cruise mixture. Leaning the mixture would help compensate for the lack of oxygen at altitude. When I sleep up there I wear a breathe-right. Nobody makes one of these for the car :laugh: .

    Apply this inversely to your situation.
     
  5. gun-G

    gun-G Long time Buick Nut

    Great. at least it won't be DOA. thanks again, Steve
     

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