2021 Supra SA Surf Settings, Lead Amount/Placement

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Originally Posted by larry_arizona

Well, you drove a 3591 on the SA, but you would need to surf that SL to compare the 16x14.

Any word on Ron’s diagnosis?


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Dealer just picked it up today, hoping to know something first of next week, being the holiday, might take a minute. It will need a new Vee drive, after that, not sure.

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Originally Posted by KnoxMojo

. It will need a new Vee drive, after that, not sure.

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Not good! Care to share?

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Originally Posted by Holdmybeer

Not good! Care to share?

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Not totally sure as yet to what maybe happened, somehow got water in the v drive. The bilge hasn't been submerged and put over 50 hours on it this year. Have to wait and see. Failed case or seal, hopefully under warranty.

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Originally Posted by repomannv

I'm running a 2021 SA 450; All of Wake9's Supra Info on youtube is *gold*, start there.

My goofy side wave was much easier to get dialed in, so I would also start on that side :-) it was absolutely clean, long and big from day one using stock settings and autowake, and got better with Wake9's recommendations (i.e. around 9 - 9.5 pitch, 3 to 4 degree's of roll, and we like the boat around 11.2mph). I have 1000lbs of lead but don't use all of it depending on how many people are on the boat. Sometimes its just two of us, so I bring all the lead. What I really struggled with was the regular side wave, I just couldn't get a consistent wave, and especially I couldn't get a clean wave. I could get a big wave depending on settings, but it was always dirty. I'd go with around 9 - 10 degrees of pitch, and about -1 degree of roll, as Wake9 suggested as a starting point, but it was dirty on my boat. I learned that not every boat is identical, you have to experiment and find what works on yours. It took me awhile to realize I needed more roll on my boat on the regular side... with about about negative 4 to 4.5 degrees of roll the regular wave got super clean! Lead really helps a lot, you can move it around and experiment to see what works, getting those ballast tanks full definitely gets a bigger wave. Once I get a wave I like, I turn off autowake and just lock everything in for that rider. Don't be afraid to experiment and take a lot of notes so you remember. Change one thing at a time, otherwise you won't know what change made a difference.

Something that I'm struggling with is speed... autowake doesn't seem to get my boat up to the right speed, I think I may have a calibration issue? If I set autowake at 11.2mph for instance, my boat will go 10.0 or something like that, if I bump up the autowake speed, say to 14, my boat my go up to 10.8 or so. My boat has no problem returning to dock at full speed so its not a prop issue, or systemic engine issue. Has anyone else experienced something like this with autowake? I'm going to call it into Supra, but thought I was mention it here to see if someone else has seen this problem.

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I couldn't spin a 14.5 x 14.25 with full ballast when I got my 2017 SA 450. I went throu 4 lol rops to try and figure it out. Brought it into the dealer and they diagnosed the fuel pump at load wasn't getting to pressure. Just an idea.

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Originally Posted by tarasstjean

I couldn't spin a 14.5 x 14.25 with full ballast when I got my 2017 SA 450. I went throu 4 lol rops to try and figure it out. Brought it into the dealer and they diagnosed the fuel pump at load wasn't getting to pressure. Just an idea.

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Prop issue for sure on the boat in discussion above. Should be a 3591 on the boat. Likely not a fuel pump as I suggested above.

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Got my 3591 on this weekend.
Marginal improvement over the 16x15. I was hoping for more, it's better but nothing spectacular after one days use.

That being said I then promptly hit a rock (staying at my aunt and uncles lakehouse with a shallow dock unfortunately) and had to go back to the 16x15.
I barely noticed the difference surfing after swapping back. It's probably more noticeable getting up on plane but we didn't wakeboard at all until after the rock hit.

With the 16x15 and full ballast + 5 people and 600lbs of lead the ole 400 isn't thrilled but it will get up on plane and throw an intimidatingly wake. I imagine the 3591 will get there easier.

Point of this post is just to give my impression going from the 16x15 to the 16x13.9
Doing it over I would go lower pitch for more of an impact. The 16x13.9 is a great prop and likely the sweet spot between cruising and heavy weighted performance but it's not enough of a jump to justify switching from the 16x15 if you just want more bottom end IMO.

Thanks for the feedback Justin, the 16x13.9 replaced the 16x15 option this year on Supra builder.

Perhaps just a refinement over the 16x15?


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Originally Posted by larry_arizona

Thanks for the feedback Justin, the 16x13.9 replaced the 16x15 option this year on Supra builder.

Perhaps just a refinement over the 16x15?


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Yep that's my take. It's better, but not a huge upgrade. Not really worth spending the 1000 bucks on unless you need a backup and just want a small upgrade over the 16x15.

I think the 16x13 is probably the way to go heavily weighted.

Keep in mind I came from a 2018 SA400 1.5 with a 15x12.5

The 400/1.76 16x13.9 pulls like a freight train comparatively.


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Oh yeah I was super impressed with mine when I got it as well. As time goes on you always want more though hahaha. With no ballast I love to slam the throttle from idle and I'm on plane in a couple seconds or less it's awesome.

My only real "issue" is surging a bit with really heavy weight surfing. With all my ballast and a boat full of people my boat will overshoot then undershoot the target speed rhythmically. A prop with a bit more bite should solve that. I didn't get a chance to test that much weight with the 13.9 but if it fixes that then all is well with the world.