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  1. #181

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    Quote Originally Posted by tre View Post
    Goose mentioned a ton of good info on transmission ratios above. I have one more question. My current 2009 Supra 24SSV says it has a 1.46 to 1 V drive and a 1 to 1 transmission. When you are talking about the 1.76, are you talking transmission or V drive? Is the trans still 1 to 1 and the V drive is 1.76? I'm looking at upgrading to a new Supra and I'm trying to figure out if we'll be able to get my 76 year old Dad up on a Slalom ski like we can in our current Supra. He needs to get up fast or he can't get up. He can't drag in the water waiting for the boat to plane. Our current Supra has the 340HP ETX CAT and the boat weighs roughly 4000lbs. That is 11.6 HP per pound. A Supra SL with a 450 Raptor is 410HP which works out to 13.65 HP per pound. It get worse with the heavier SE at 15HP per pound. Those numbers make me think these new boats will be awesome for me and my kids to Surf and wakeboard but I'm worried I can't get my Dad up on a slalom Ski. I'm sure the 1.76 and props play a part in all of this as Goose explained. I'm trying to figure out what exactly is 1.76, the V drive or trans? I'd like to compare to my current Supra.
    I meant pounds per horsepower. 2009 24' Supra = 11.6 lbs per HP. Current SL with 450 Raptor = 13.65 lbs per HP. Curret SE with 450 Raptor = 15 lbs per HP. Still my question about the ratio remains and if I can get my Dad up on a slalom ski without dragging him in the water too long before the boat is on plane.
    2020 Supra SE 450

  2. #182
    Join Date
    May 2018
    Posts
    4,920

    Default 2020 Models Supra New Features - Speculations?

    Quote Originally Posted by tre View Post
    I meant pounds per horsepower. 2009 24' Supra = 11.6 lbs per HP. Current SL with 450 Raptor = 13.65 lbs per HP. Curret SE with 450 Raptor = 15 lbs per HP. Still my question about the ratio remains and if I can get my Dad up on a slalom ski without dragging him in the water too long before the boat is on plane.
    I don’t think Boat mass per HP is what you want to calculate.

    I would look at boat mass per Lb ft of torque at the prop.

    You want to include torque multiplication of the 1.76 trans ratio.

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    Last edited by larry_arizona; 08-21-2019 at 03:39 PM.
    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  3. #183
    Join Date
    Jul 2015
    Location
    Bullard,Tx
    Posts
    321

    Default

    The SA that showed up at our dealer had a 16" prop on it. It had the 400 motor.
    2020 SA ?,2019 SE550
    2018 G23 sold
    2017 SE450,2016 SA400 Sold
    2015 MB B52 23,2012 MB F21 Sold
    2014 Axis A22, 2010 Axis A22 Sold

    2018 Ram 2500

  4. #184
    Join Date
    May 2018
    Posts
    4,920

    Default 2020 Models Supra New Features - Speculations?

    Quote Originally Posted by DatTexasBoy View Post
    The SA that showed up at our dealer had a 16" prop on it. It had the 400 motor.
    ACME 3499 16x17 to be exact. Only one prop option on the 2020 400/450 Supra’s


    Moombas run the OJ 15.5x16.5 on the 400/450 for 2020.
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    Last edited by larry_arizona; 08-21-2019 at 03:46 PM.
    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  5. #185
    Join Date
    Jul 2010
    Posts
    532

    Default

    There's two prop options for the 2020 Supra 400/450s. There's a 16 x 15 and 16 x 17

  6. #186

    Default

    [QUOTE=Mobius22;346219]There's two prop options for the 2020 Supra 400/450s. There's a 16 x 15 and 16 x 17

    There you have it...DT has spoken

    Drew, can I spin a 16" prop on my 2018 SL550?
    2018 Supra SL550 with 850lbs of lead wake
    2017 Supra SA400 (Sold)
    2016 Moomba Mojo Surf Edition (Sold)
    2017 Ford F250 Super Duty (Sold)
    2019 Ford F250 Super Duty (Sold)
    2021 GMC Denali 2500
    Soulcraft Vodoo
    Soulcraft Jordi Pro
    Soulcraft Super AV
    Phase Five Matrix

  7. #187
    Join Date
    Aug 2017
    Posts
    1,382

    Default

    Quote Originally Posted by Mobius22 View Post
    There's two prop options for the 2020 Supra 400/450s. There's a 16 x 15 and 16 x 17
    My 2020 SL450 came with 16x17 and with 1000# lead at 1450’ and a few people I can’t quite pull it.

    16x15 would be the ticket. I have a 16x16.25 on it now and it’s working out.


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  8. #188
    Join Date
    May 2018
    Posts
    4,920

    Default

    Quote Originally Posted by dakota4ce View Post
    My 2020 SL450 came with 16x17 and with 1000# lead at 1450’ and a few people I can’t quite pull it.

    16x15 would be the ticket. I have a 16x16.25 on it now and it’s working out.


    Sent from my iPhone using Tapatalk
    What is your top speed with the 16x17?


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

  9. #189
    Join Date
    Aug 2017
    Posts
    1,382

    Default

    Quote Originally Posted by larry_arizona View Post
    What is your top speed with the 16x17?


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    No clue.


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  10. #190
    Join Date
    May 2018
    Posts
    4,920

    Default

    Quote Originally Posted by dakota4ce View Post
    No clue.


    Sent from my iPhone using Tapatalk
    Then I would absolutely opt for the 16x15

    Is the octane booster working out so far?


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

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