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  1. #21
    Join Date
    May 2017
    Location
    Alberta, Canada
    Posts
    238

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    Quote Originally Posted by larry_arizona View Post
    What pitch do you run? Once I hit 10, the load is exponential. 8.5-9.5, no problem.

    But at 10, the wave is obnoxiously big.

    SA400 16x13.9 1000feet heavy crew.

    Greater than 10, I think the prop angle is fighting the boat and all efficiency is lost.
    We run light crew, usually 2 kids, 2-4 adults (one of whom is surfing). We have ocassional days where we get a big crew out but those are few and far between.

    For any rider heavier than say, ~220 lbs, I've found that 10 deg pitch / 11mph is the most forgiving because of how much push it gives them. They stay on the wave longer and they learn quicker. A big frustration for me as the driver is seeing a big dude, who's had his first 10 or 20 pulls, and is starting to get the hang of it, washout because the wave didn't have enough push. For anyone below that weight I run 9.5 deg pitch for a good balance of push/length. With lighter women or kids, under say, ~140 lbs, I've gone down to 9 deg for more length.

    I run wakeplate at 0 for reg and 15 for goofy. Fill ballast to 100%, move people/lead around to hit the numbers I want. I use Autowake for diagnostics only, (showing me the pitch/roll values).

    I agree with not going above 10 degrees; RPM's go above 4500, no gains and you can usually see the fuel disappearing in real time.
    2021 Mojo, 6.2L Raptor 400/1.76, Acme 3407 15.5x13, G6, Flow3, 6500 lbs ballast
    2005 Mobius LSV (sold)
    Windermere Lake, B.C., 2800' Elevation
    2021 Mojo Mods

  2. #22
    Join Date
    May 2017
    Location
    Alberta, Canada
    Posts
    238

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    Quote Originally Posted by HFarr View Post
    I generally run anywhere from 10 mph to 11.5 mph and 10-15 on the wake plate depending on which of my kids are back there. Sometimes 22 degrees , and sometimes 0 when they ask for a really tall wave. My pitch is generally around 8. Sometimes a bit more or less depending on speed and who is back there. That seems to make a good wave. I have to be honest, I generally don't use
    Autowake. And yes I have the stock 15.5x 15 oj surf prop. 1.76 trans.

    I have never had it at any other higher elevation lakes, so I can't help with that part of the question.
    Running 8 degree pitch explains part of it for sure and the higher altitude/power loss on my side probably makes up the rest.
    2021 Mojo, 6.2L Raptor 400/1.76, Acme 3407 15.5x13, G6, Flow3, 6500 lbs ballast
    2005 Mobius LSV (sold)
    Windermere Lake, B.C., 2800' Elevation
    2021 Mojo Mods

  3. #23

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    Altitude is a killer for boats. Our local dealer won’t order a makai without a 450 in it. I’ll be honest our new sl has the 575 and it is barely adequate in Pueblo, altitude 5k feet but density altitude is 8-10k in the summer.
    2022 SL550

  4. #24
    Join Date
    May 2018
    Posts
    4,717

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    Quote Originally Posted by mjb929rr View Post
    Altitude is a killer for boats. Our local dealer wont order a makai without a 450 in it. Ill be honest our new sl has the 575 and it is barely adequate in Pueblo, altitude 5k feet but density altitude is 8-10k in the summer.
    I agree 1000% on DA. Makes a HUGE difference, plus humidity is a large factor in calculating DA and boats are directly on water obviously which has a contributing vapor layer.


    Sent from my iPhone using Tapatalk
    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  5. #25
    Join Date
    Mar 2022
    Location
    Winston Salem NC
    Posts
    136

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    Quote Originally Posted by HFarr View Post
    I have a Makai with a 400, and upgraded WM bags. I can honestly say I have no power issues even with almost 5K of water and 10 people in the boat. Mostly surf all the time. I have the 15.5 x15 prop and am only about 237 ft above sea level however.

    Sent from my SM-G781V using Tapatalk
    I'll second this. I've got zero issues surfing at 10-11mph at 10 deg pitch (if wanted) with 6000lbs of ballast and people. I'm boating here: https://en.wikipedia.org/wiki/Belews_Lake which is at 700 ft. I usually run about 8.5-9.5 pitch though.
    2022 Makai 400
    15.5x16.5 prop (18 back up)
    Chilltech
    Premium Wetsounds Package
    WakeMakers (custom) bag upgrade

  6. #26
    Join Date
    Mar 2021
    Location
    South Georgia
    Posts
    1,613

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    This is me.

    https://en.wikipedia.org/wiki/Lake_Blackshear

    Like I said. Dang near sea level.

    Sent from my SM-G781V using Tapatalk
    2021 Moomba Makai
    Black Cherry Metal Flake & Fire Red
    Nibral OJ 15.5x15 Altitude/Wake prop w/1.76 trans v-drive
    Wet Sounds bow speakers & 10's on the Tower & ported sub

  7. #27
    Join Date
    May 2018
    Posts
    4,717

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    I use this Density Altitude calculator if anyone is interested.

    https://apps.apple.com/app/id560993349


    Sent from my iPhone using Tapatalk
    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  8. #28
    Join Date
    May 2017
    Location
    Alberta, Canada
    Posts
    238

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    Quote Originally Posted by mjb929rr View Post
    Altitude is a killer for boats. Our local dealer won’t order a makai without a 450 in it. I’ll be honest our new sl has the 575 and it is barely adequate in Pueblo, altitude 5k feet but density altitude is 8-10k in the summer.
    TIL / thanks for the heads up.

    I had no idea about density altitude. I'll use Larry's app this summer and try and see what my true power loss is.
    2021 Mojo, 6.2L Raptor 400/1.76, Acme 3407 15.5x13, G6, Flow3, 6500 lbs ballast
    2005 Mobius LSV (sold)
    Windermere Lake, B.C., 2800' Elevation
    2021 Mojo Mods

  9. #29

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    Quote Originally Posted by Hayden View Post
    TIL / thanks for the heads up.

    I had no idea about density altitude. I'll use Larry's app this summer and try and see what my true power loss is.
    I have a banks idash in my truck and one of my parameters is density altitude.
    The lake we frequent in Nebraska is 2800’ elevation. However even in the cool mornings we see a DA of 5500-6000’. During the mid day heat closer to 7-7500’. This is what the engine thinks the altitude is and performs accordingly.
    My old 20 sl450 was gutless here when loaded up with people and 1k of lead.
    2022 SL550

  10. #30
    Join Date
    Mar 2021
    Location
    South Georgia
    Posts
    1,613

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    That's crazy! But....that is when a turbo makes a huge difference. Pack that extra air in there!

    Sent from my SM-G781V using Tapatalk
    2021 Moomba Makai
    Black Cherry Metal Flake & Fire Red
    Nibral OJ 15.5x15 Altitude/Wake prop w/1.76 trans v-drive
    Wet Sounds bow speakers & 10's on the Tower & ported sub

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