2021 Mojo Update

[2in2out]

Love seeing all this discussion on weight and wave setup! I have a new 2021 SL450 (picked it up about three weeks ago). I have 1000 lbs of lead and we've usually had a moderate crew of 5-7 people. I want to surf at about 11.3 or 11.4 but the boat STRUGGLES to get there. Sometimes it simply can't do it. I've been slowly moving more weight toward the bow to the point that there's only 100 lbs in each rear locker. That has helped some, but it's still a struggle. I've had to start adding center plate to help the boat reach speed, but of course this is counter-productive for maximum displacement and the best wave. Is this normal? I really didn't realize that the power margin would be so slim for surfing.

If you have 5-7 people lose 50# of lead per person.


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[Tommy2slow]

Love seeing all this discussion on weight and wave setup! I have a new 2021 SL450 (picked it up about three weeks ago). I have 1000 lbs of lead and we've usually had a moderate crew of 5-7 people. I want to surf at about 11.3 or 11.4 but the boat STRUGGLES to get there. Sometimes it simply can't do it. I've been slowly moving more weight toward the bow to the point that there's only 100 lbs in each rear locker. That has helped some, but it's still a struggle. I've had to start adding center plate to help the boat reach speed, but of course this is counter-productive for maximum displacement and the best wave. Is this normal? I really didn't realize that the power margin would be so slim for surfing.

Are surfing at a lake more than 2000’ above sea level? If so you need to change your prop to one with less pitch. Maybe something in the 13-14. Pitch range. If you are not at a high altitude and your boat is struggling with only 1000 extra pounds and a medium sized crew I think you might have an issue with the boat that your dealer should be made aware of.

[dakota4ce]

Are surfing at a lake more than 2000’ above sea level? If so you need to change your prop to one with less pitch. Maybe something in the 13-14. Pitch range. If you are not at a high altitude and your boat is struggling with only 1000 extra pounds and a medium sized crew I think you might have an issue with the boat that your dealer should be made aware of.

16/15 acme prop is the prop for that boat. Check to see what you have!

Betting you have the 16/17 and it’s a hard pull. I had to switch mine too.


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[larry_arizona]

For 2021, Supra offered these 3 props for the 400/450’s



The 16x13.9 is a prop specifically developed with Skier’s Choice and ACME for the 400/450 1.76 combo.

I am running the 16x13.9 currently and love it.


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[HFarr]

Wow!! You definitely either have the 17 pitch prop(or possibly higher from what you say it's doing, but if it's factory then probably 17). Or, you have something wrong with the motor. I have a 400 in my 24.5' long Makai and have easily hit surf speeds no problem at all with 4k of ballast and 16 fully grown ( and a few extra grown) adults on there. I have an OJ 15.5 X 15 prop. It hardly struggles. The 450 should have no problem getting there. I am betting on the prop.

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[sleek98]

Holy cow. At 10* -1 and 1800# total in people/lead I was on the brakes so hard that I ended up swapping my board from a twin to a single fin. I even forgot to have my wife drop the wake plate from 25 to 10. Surf plate was at 65. Had my wife speed up to 11.5 and it felt like the wake was 20 foot long. We had to drop the pitch for my wife to 9 as she couldn’t stay off the transom of the boat even standing on the brake, after we dropped the nose she was golden.

So much fun. Left autowake on and moved weight around to offset where it dumped. After moving to lead once it kept it at 99/100 all around.

[larry_arizona]

It’s an awesome feeling when you get the wave dialed in. Congrats!!!


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[HFarr]

Holy cow. At 10* -1 and 1800# total in people/lead I was on the brakes so hard that I ended up swapping my board from a twin to a single fin. I even forgot to have my wife drop the wake plate from 25 to 10. Surf plate was at 65. Had my wife speed up to 11.5 and it felt like the wake was 20 foot long. We had to drop the pitch for my wife to 9 as she couldn’t stay off the transom of the boat even standing on the brake, after we dropped the nose she was golden.

So much fun. Left autowake on and moved weight around to offset where it dumped. After moving to lead once it kept it at 99/100 all around.

Got any photos? Sounds awesome

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[sleek98]

Not right now, have a couple videos but they are not a good angle. I didn’t setup the GoPro, was messing with the lead and forgot.

I’ll setup the GoPro tomorrow and get some clean pictures of just the wave and upload them.

[endotiger]

Thanks for info everyone! Extremely helpful. Yep, I checked today and it's the 17 pitch. Very frustrated here. I completely understand the concept of prop pitch and how it relates to speed, rpm, torque, etc. But I have zero knowledge of the specific numbers that work for these boats. Soooo, I've bought a boat for surfing with a prop that's not well-suited for that purpose, and I could have had the correct prop for only an additional $80 msrp! I would certainly expect better counsel from a dealer for a purchase as large as this.