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  1. 08-08-2018, 12:46 PM #1
    allstock
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    Hydrotec vs stock heads

    I’m hoping someone from Hydrotec can chime in. Can anyone tell me the difference between cutting the stock heads on a 3.1l and the Hydrotec heads? Different chamber/squish band? Cranking psi with the recreational heads?
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  2. Mat_HT
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    #2 08-10-2018, 03:27 PM
    No difference....we start with a set of factory heads. On my compression gauge I see around 135-140 psi
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  3. allstock
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    #3 08-13-2018, 10:02 AM
    Quote Originally Posted by Mat_HT View Post
    No difference....we start with a set of factory heads. On my compression gauge I see around 135-140 psi
    Thanks very much Mat, I appreciate the info!
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