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Thread: Mph?

  1. #1
    Danhercules
    Any guess's on how fast this boat is?
    '74 Tahiti, Stock 455 olds, guessing about 250 HP, spinning a "A" at 4200 RPM

  2. #2
    Senior Member
    Join Date
    Feb 2009
    Location
    Irvine, CA
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    2,885
    60?

  3. #3
    dmontzsta
    60?
    I would say more like 50.

  4. #4
    DUECE'SDAD
    A buddy of mine had similar set up in a early sanger jet and thought it was about 67-70 and it gps at 53. He was sick after knowing it was only low 50's and put more compression pistons, tunnel ram and different cam, really made the motor thump and tuned off a wopping 57 mph. I would say mid 50's most

  5. #5
    Senior Member
    Join Date
    Feb 2009
    Location
    Irvine, CA
    Posts
    2,885
    60?
    I would say more like 50.
    I was giving him the benefit of doubt :redface: (running down river with a 40 mph tail wind )

  6. #6
    cole13
    got a buddy with a 455 miller. Runs 63 I think. He has dual carbs though!!

  7. #7
    jackpunx
    A buddy of mine had similar set up in a early sanger jet and thought it was about 67-70 and it gps at 53. He was sick after knowing it was only low 50's and put more compression pistons, tunnel ram and different cam, really made the motor thump and tuned off a wopping 57 mph. I would say mid 50's most
    LMAO.. GPS Sux

  8. #8
    dmontzsta
    I was giving him the benefit of doubt :redface: (running down river with a 40 mph tail wind )
    its all good G.

  9. #9
    jpeaston
    I had a stock 455 with exception of performer intake under a Carter 600, with log exhaust gps'd 59 at 5100 rpms on a Wreidt Maverick. I rebuilt it 30 over with a tr and one 800dp and now I'm at 57.7 @ 4900. I still haven't figured out what size impeller I have. Talk about disappointment.

  10. #10
    Nucking futs
    45-50 at best.................

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