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Thread: What should rpms run while surfing

  1. #1
    Join Date
    Jun 2017
    Location
    Canton , ga.
    Posts
    240
    Boat
    Z3

    What should rpms run while surfing

    I bent my prop and just replaced it with the acme 2419 on a z3. I was wondering where my rpms should be hanging around , both cruising and surfing
    If you wanna know what I did , come with me next time...

  2. #2
    Join Date
    Aug 2015
    Location
    Salt Lake City, Utah
    Posts
    1,269
    Boat
    2017 RZX3, 2013 MB F24, 2000 21V
    Need to know what your drivetrain specs are, how much ballast your run while surfing, your lakes elevation, how many people in the boat.

  3. #3
    Join Date
    Jul 2015
    Location
    Orange County
    Posts
    1,689
    Boat
    2019 ZX5/ZX1
    Only one ratio in a Z3, aside from the 575 should all be roughy the same at surf speed given the motors are building roughly the same torque at that speed. Heavily ballasted you should be 3500-3900 at surf speed. Cruise speed will vary, at 27-28 you should be in the 4s if my mind serves me right.

  4. #4
    Join Date
    May 2014
    Location
    Vancouver Island, BC, Canada
    Posts
    1,211
    Boat
    2016 RZX3, 2014 R20 with taps 3
    Rzx with that prop and tranny I’m right at 4000 or just under for surfing,

  5. #5
    Join Date
    Jul 2010
    Posts
    130
    Boat
    2018 r23
    at 1000' amsl, 2419 prop, '18 R23, raptor 400, full rear ballast bags, 900# lead in rear (even), and 60/40 in front bags, 3 ppl ~500#, goofy wave, 11.4, taps 4/4 i think, and we were running right around 3200rpm

    Sent from my SM-G955U using Tapatalk

  6. #6
    Join Date
    Jul 2010
    Posts
    130
    Boat
    2018 r23
    Quote Originally Posted by cnote View Post
    at 1000' amsl, 2419 prop, '18 R23, raptor 400, full rear ballast bags, 900# lead in rear (even), and 60/40 in front bags, 3 ppl ~500#, goofy wave, 11.4, taps 4/4 i think, and we were running right around 3200rpm

    Sent from my SM-G955U using Tapatalk
    and cruising (~28), no ballast, same ppl, right around 4100-4200. but i wasn't paying as close attention but will this weekend and report back. I'm really impressed with the setup on this boatfor surf efficiency, for me one of the selling points. I think we used just over 15 gal of 90 octane for about 2-3 hours of surfing with a little cruise mixed in.

    Sent from my SM-G955U using Tapatalk

  7. #7
    Join Date
    Jun 2017
    Location
    Canton , ga.
    Posts
    240
    Boat
    Z3
    Thank you guys as always, I will keep a much closer tab on it over the next few weeks and report in.
    If you wanna know what I did , come with me next time...

  8. #8
    Join Date
    Jul 2010
    Posts
    130
    Boat
    2018 r23
    @Langwell: updated numbers from this weekend w/ the 2419 on my '18 R23, raptor 400. Surfing was ~3100rpm with 700# people, 500# lead all in back, rear bags full, forward bags 50/50. 11mph, 4/3 surf/taps. Cruising ~4000 RPM 28mph, no water ballast, 700# ppl and 500# lead in the back. WOT 39mph @ 5400rpm (just me in the boat, with the lead). Hope that helps.

  9. #9
    Join Date
    Sep 2008
    Location
    Sandpoint Idaho
    Posts
    1,364
    Boat
    2005 24v
    Lower the better for wash and a clean wave. I think I turn 2100 at 12.75-13.25 mph and heavily ballasted.

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