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  1. #1
    Value one MB VIP's Avatar
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    May 2007
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    riva head only 135 compression

    I need more power. should i have a friend mill the riva head. send the head to riva and get it milled or go a different route on the head. I am looking for about 150 psi to push my 14/20 prop.


  2. #2
    305coco's Avatar
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    May 2007
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    cape coral, florida USA
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    were r you located at

  3. #3
    I sent my riva head to jim and he milled it to 150 and every cylinder was spot on 150psi...Cost was $100.00

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