Compression too high?

Discussion in 'Fox 5.0 Mustang Tech' started by Jaswir, Nov 10, 2009.

  1. Jaswir Member

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    Did a Compression test all cyliners are at 170.

    on a cold motor

    i always thought it was lower like 130 or so?



    does it matter? as long as there all the same?
    Jaswir, Nov 10, 2009
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  2. ID89GT Active Member

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    The higher the better, as long as they are all around the same then you are good
    ID89GT, Nov 10, 2009
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  3. Jaswir Member

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    yea they all were almost dead on 170
    Jaswir, Nov 10, 2009
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  4. liljoe07 New Member

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    Those are fine. On new/rebuilt and depending on the cam, I like to see 150-180ish on the cranking compression.
    liljoe07, Nov 10, 2009
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