Post Your Top Speed

Discussion in 'Sport Boats' started by surfinjoe, May 13, 2008.

  1. IanBat

    IanBat New Member

    Nov 19, 2011
    Sydney, Australia
    Pro Tournament 36' 1999
    Twin Cummins 5.9L 370hp B Series
    Old Post I know.

    But

    I had a newly cleaned bum, flat water and a good clear stretch. So tabs fully up.trim the legs out..........could only get 3800RPM, I have always been down on revs, have never investigated why...36Kn...even. Thats on a 20 year old 330DA................I dont really think I need to find the other 900 or so Revs!
     
  2. juggernaut1

    juggernaut1 Active Member

    772
    Apr 19, 2015
    Perth, Western Australia
    2006 38 Sundancer
    8.1S / ZF 63V Drives
    The day I bought my 38 (back in April) clean bottom, small amount of coral on the props - 29 knot average (GPS) in both directions offshore (Indian Ocean) with small chop. Half tank of fuel and water, 2 people on board. Running around 4650 rpm. I was using some tab and may have gone a smidge faster without any tab :huh:
     
  3. DiSH

    DiSH New Member

    66
    Oct 6, 2014
    Sumter, SC
    1998 210 BR
    5.0 EFI Mercruiser w/Alpha 1 Drive
    Think I'll jump on this old thread--48 MPH @ 4900 RPM. Smooth lake with wife and 3 kids, 1/4 tank of fuel.
     
  4. blaster

    blaster Active Member

    May 23, 2011
    potomac river
    2010 sea ray 205 sport
    F150 5.4 xlt 4x4
    Mercruiser 4.3 mpi alpha 1.62
    Sea Ray, 53 MPH 4800 RPM 21" vengeance. 51 MPH 4950 RPM 19" vengeance. 4.3 mpi

    Whaler 41 MPH 13x19" Solas 5500 RPM 75ELPTO
     
  5. juggernaut1

    juggernaut1 Active Member

    772
    Apr 19, 2015
    Perth, Western Australia
    2006 38 Sundancer
    8.1S / ZF 63V Drives
    .......and what about your boat :grin:
     
  6. JimT

    JimT Well-Known Member SILVER Sponsor

    Jul 7, 2009
    Charlotte, NC- LKN
    2010 330 Sundancer
    T-350mags w/BIIIs & Axius, 5.0 kw Kohler
    42 mph at 5000 rpm
     
  7. paddle

    paddle New Member

    4
    Sep 25, 2014
    N.B. Canada
    2001,sundeck 210
    5.0 mpi,,,alpha
    what prop are you using
     
  8. boatman37

    boatman37 Well-Known Member

    Jun 6, 2015
    pittsburgh
    2006 Crownline 250CR
    Previous: 1986 Sea Ray 250 Sundancer
    5.7 Merc
    typically about 32mph but have hit 34 or 35 (GPS) at about 3800rpm. tune up parts on order but according to SR the top speed on my boat should be about 32mph
     
  9. SeaAyeOwe

    SeaAyeOwe New Member

    495
    Dec 17, 2013
    Vancouver BC Canada
    2005 Sea Ray Sundancer 320
    Merc. 350 MPI Stern Drives
    Blue Hull
    Zodiac C285S Dinghy w/ Yamaha 15H
    2 x MERCRUISER 350 HORIZON 300 HP gasoline engines w/Bravo III Drives
    Ian - did you mean to write 36 NM (nautical), or 36 km - 36 NM or 50 mph/67kmph seems pretty good at 3800 rpm.
     
  10. nickdcj7

    nickdcj7 Member

    233
    Jan 5, 2014
    Bass River, NJ
    1986 390 EC
    Twin 454 Mercruisers
    My most recent top speed run was 32 mph at 4500 rpm. I think i could have gotten another 2 mph or more from trimming out, but i ran out of river since I was on my way in when I decided to punch it.
     
  11. SloBurn

    SloBurn Member

    768
    May 30, 2013
    Greenwood Lake, NY
    1994 270 Sundancer. 7.4L Merc. Tow with a 2006 Dodge RAM Hemi
    340 HP Merc 454 c.i.
    I hit 78 mph on route 80 with tabs up, leg up, boat strapped down. Does it matter if it was on the trailer at the time? In the wet, 34 mph is as hard as I ever push the old girl. She's getting up there in age and doesn't take kindly to a beating.
     
  12. Sangster

    Sangster New Member

    80
    Jan 29, 2013
    Central Florida
    2007 Sea Ray 185 Sport
    2007 4.3L Mercruiser
    52 on the gps with just me and 1/2 tank of gas.
     
  13. IanBat

    IanBat New Member

    Nov 19, 2011
    Sydney, Australia
    Pro Tournament 36' 1999
    Twin Cummins 5.9L 370hp B Series
    36knots 36 nmph. And yes I'm pretty happy, hence not going to go looking for the extra 900 rpm that probably should be there.

    36NMh in a 20year old, 10,000lb boat, I'm happy with that.

    I did NOT look at the fuel burn, purposefully.
    However sitting at 18-22Nmh, she was sipping 35-40L around 10USGPH per side, again fairly happy


    Sent from my iPad using Tapatalk
     
  14. Water Boy

    Water Boy New Member

    25
    Aug 17, 2015
    Hampton, New Brunswick
    1997 sundancer 250
    350 mercruiser w/bravo II
    First ride out in my new to me 185 sport 3.0L I got her to 38mph (gps) @ 4500rpm. That was with my wife, two small kids and full tank of fuel. Seemed to like cruising at around 30mph. I was worried about the little 3.0L in this boat but it seems to work pretty good. Would like to have more power of course but not disappointed.
     
  15. DiSH

    DiSH New Member

    66
    Oct 6, 2014
    Sumter, SC
    1998 210 BR
    5.0 EFI Mercruiser w/Alpha 1 Drive
    Not sure about the size, but it is a Mercury Vengeance prop that came on the boat. It is a 3 blade, and I think it is 19 pitch.
     
  16. keokie

    keokie Well-Known Member

    Dec 27, 2006
    Arizona
    2002 310 Sundancer, Westerbeke 4.5 Genset
    496's, Bravo III's, 2.2:1 Gears
    IanBat, be careful about being down on WOT RPM. If it is due due improper propellers, you can definitely burn up the motors.
     
  17. IanBat

    IanBat New Member

    Nov 19, 2011
    Sydney, Australia
    Pro Tournament 36' 1999
    Twin Cummins 5.9L 370hp B Series
    Yeah,
    Im aware of that, its propped correctly. In mine, it is more of a case of a linkage issue, but with the way it hole shots, planes and top end speed, I have not needed the extra 900RPM or so, I rarely go over 2800RPM with it, as there is no need.
     
  18. gtfireftr

    gtfireftr Member

    275
    Oct 9, 2014
    Westport MA
    1997 Sea Ray Sundancer 290
    Twin 4.3 liter w/Alpha Drives
    I have heard this, but how could a lower WOT cause engine damage?

    thanks
     
  19. IanBat

    IanBat New Member

    Nov 19, 2011
    Sydney, Australia
    Pro Tournament 36' 1999
    Twin Cummins 5.9L 370hp B Series
    If the engine can't reach full WOT is a sign that the props are placing too much load on the engines trying to spin them, as such the engines are working too hard......over propped, props too big

    Likewise if the engines hit WOT too easily and quickly and top speed is down, then boat is under propped, props to small


    Sent from my iPad using Tapatalk
     
  20. JBJ

    JBJ Member

    96
    Jan 14, 2008
    Solomons MD
    370 EC 1999
    Cummins 6.7 QSB 480 hp
    34.8 knots with full fuel, water and gear. I talked to the yard that did the repower today, they think we can get a couple of more knots out of her.
     

Share This Page

Show Sidebar