2020 Models Supra New Features - Speculations?

[tre]

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.

[larry_arizona]

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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[DatTexasBoy]

The SA that showed up at our dealer had a 16" prop on it. It had the 400 motor.

[larry_arizona]

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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[Mobius22]

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

[Prospersigman]

[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?

[dakota4ce]

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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[larry_arizona]

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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What is your top speed with the 16x17?


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[dakota4ce]

What is your top speed with the 16x17?


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No clue.


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[larry_arizona]

No clue.


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Then I would absolutely opt for the 16x15

Is the octane booster working out so far?


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