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Thread: M20 severe power loss in high altitudes? Bend, OR.

  1. #1
    Join Date
    Aug 2005
    Location
    West Portland, OR
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    1,435

    Default M20 severe power loss in high altitudes? Bend, OR.

    I was in Bend this week, and noticed that once I got near the elevation, and especially driving around at city speeds (trying, anyway) my M20 became a major putt-putt car. Any thoughts? Is this normal, or is my MAF not tuned properly/components going bad?

    Again, any experience with M20 or M30 high altitude performance would be GREATLY appreciated. I do recally Shogun mentioning BMW and their chip design regarding high altitudes, being a general, "solve-all." Honestly, I think it's the MAF, but I don't know how to diagnose.
    EuroLux:. Private Detail
    E34 1/'89 ///M20 2.5i: Lachsilber

  2. #2
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    3623 feet elevation... it is high but not as high as Denver.

  3. #3
    Join Date
    Jan 2006
    Location
    New Mexico
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    192

    Default

    Quote Originally Posted by Tiger View Post
    3623 feet elevation... it is high but not as high as Denver.
    Here in Santa Fe New Mexico over 7000ft, Denver is a around a mile (5280ft), my M20 does great the higher I go in altitude, nothing like forced induction....
    Do check the MAF....
    M20 525/7 Bore: 84.50mm Stroke 81mm CR 8.5:1, blue printed/dyno & custom chip. Boost @ 6.5psi ~246hp @ 5300rpm / torque @ 269ftlbs. @ 4250rpm

  4. #4
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    Turbo works great in high altitude environment.

  5. #5
    Join Date
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    West Portland, OR
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    FYI, I was a lot higher than that at many points.
    6335ft up near Mt. Bachelor, but it was still slow at lower elevation.

    What I would like to know, though, is what components should I specifically check, Where is the MAF sensors and things that could cause this problem?
    EuroLux:. Private Detail
    E34 1/'89 ///M20 2.5i: Lachsilber

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