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High altitude jet selection?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by WheelinK5, Oct 14, 2001.

  1. WheelinK5

    WheelinK5 Registered Member

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    I run a 350 with a larger comp cam, edelbrock performer intake, edelbrock Q-jet series carb 750cfm, headers to 2.5" duals to 2 chamber flows.

    I am having a hard time with this altitude and running too rich. I live in Denver at 5200ft and would like anyones help with proper jetting selection.

    thanks for the help.

    1986 K5
    All stock except a fully built crate 350 and Ranchos!
     
  2. WheelinK5

    WheelinK5 Registered Member

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    1986 K5
    All stock except a fully built crate 350 and Ranchos!
     
  3. HarryH3

    HarryH3 1 ton status Author

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    I'd recommend just calling the Edelbrock tech line and asking them. They should be the experts on your carb. [​IMG] It's been a long time since I owned anything other than a lawnmower that had a carb, but I think Holley recommended that you drop down one jet size for every 2,000 feet above sea level.

    <font color=black>HarryH3 - '75 K5</font color=black>
    <a target="_blank" href=http://www.angelfire.com/super/ThunderTruck>www.angelfire.com/super/ThunderTruck</a>
    It's a great day to be alive...
     
  4. FWP

    FWP CRS

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    I run an edelbrock performer(1406) on my pickup. Have it set 2 stages lean, not sure of the actual jet and rod size, but I can look it up if you want. That's for 5000 ft elevation. No problems, been running it for 3 years now. HTH

    <a target="_blank" href=http://coloradok5.com/gallery/75K5>http://coloradok5.com/gallery/75K5</a>
     
  5. WheelinK5

    WheelinK5 Registered Member

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    Thank you for the help. Edelbrock is sending me the correct jets, .070 in the mail!!

    Mark

    1986 K5
    All stock except a fully built crate 350 and Ranchos!
     

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