2021 Supra SA Surf Settings, Lead Amount/Placement

[Holdmybeer]

Do an online search. Unless someone has a good lead with ACME on this site. It can be found for under $700. I know 1 just got sold here with the tool kit for a great deal.

[SONIC]

I think it's you that's not understanding here. We're on the same page.

[SONIC]

I can't explain it in terms you are going to understand I guess, but speed over water is different than speed over land. That is why the different makes have or had up river or down river offset settings for gps zero off... I will google research later something that shows better than what I can articulate.

I think it's you that's not understanding, not being rude but I am well aware that the speed over water and speed over land are different.
I was responding to this post:

"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."


The zero off is going to go 11.2 if it's set to 11.2. That is 11.2 over the ground, it may be 18 or 6 in reference to the water (current dependent) but it's still going to say 11.2 on the screen because it's going 11.2 in reference to the satellites, just like it's supposed to.


The post I was referring to above is a prop issue( like I said), as he already verified, a 16x17 with ballast is not going to be happy getting to speed. If he's going into the current he just doesn't have enough torque to reach the set speed because the set speed is the gps speed + the current speed when going against it.

To further clarify: if his GPS speed is 11mph and he has a 2mph current against him then he's moving 13mph over the water. His current prop just isn't capable of 13mph fully loaded so he never reaches speed.

The offset feature was so that you can calibrate it for a current so your speed relative to the water is correct, it has nothing to do with maintaining a set speed. It's function was so that you can have the same wave going up and down stream because the wave cares about speed over water not speed over land.


This is a prop issue, not a cruise issue.
Headwind causes the same problem, it's not an issue with the GPS cruise, the boat just doesn't have the power with that prop to overcome a strong headwind.

GPS cruise being crappy for places with a current is a different discussion, that's all I'm saying here.

[SONIC]

On the day we were having trouble getting the boat to maintain autowake desired speed, there was both a stronger than normal current and higher than normal wind. This was on Lake Mead and we usually go out on very calm days.

I also just noticed my prop is a 16x17 !!! WTF ? Dealer must have spec'ed that for the boat, rather than the standard for a 2021 SA which apparently is a 16 x 13.9 now. Interesting, and I'm pretty shocked. Since we only wakesurf on the boat, I'm definitely thinking I should switch the prop down to a 16x15 or 16x13.9.

Nettle prop has the best price and service:

https://www.nettleprops.com/acme-359...e-105-cup.aspx

[HFarr]

Actually, it's 11.2 relative to some satellites, which are traveling really fast relative to the earth.. Yeah I know...none of what I said is relative, and I'm being a smartass! LOL!

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[KnoxMojo]

I think it's you that's not understanding here. We're on the same page.

I understand fully. Yes he needs a different prop, was just talking about that gps on the water isn't as consistent as everyone thinks for keeping the proper speed for the same wake going with and against the current. PS, OJ Props has a 16x14 that my buddy runs, it is really nice on his new SL.

[SONIC]

I understand fully. Yes he needs a different prop, was just talking about that gps on the water isn't as consistent as everyone thinks for keeping the proper speed for the same wake going with and against the current. PS, OJ Props has a 16x14 that my buddy runs, it is really nice on his new SL.

I agree completely

I called oj about a 16x13 but they weren't willing to match the price on the acme equivalent. I was planning on giving them a go but it was about 130 more than the acme. They do seem like great folks though. He said that they strictly enforce their MAP and acme doesn't so dealers sell acme stuff barely above cost.

[larry_arizona]

I understand fully. Yes he needs a different prop, was just talking about that gps on the water isn't as consistent as everyone thinks for keeping the proper speed for the same wake going with and against the current. PS, OJ Props has a 16x14 that my buddy runs, it is really nice on his new SL.

Wonder how close the OJ 16x14 is to the ACME 16x13.9


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[KnoxMojo]

Wonder how close the OJ 16x14 is to the ACME 16x13.9


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We will be going out on his boat today since ole Ron is at the Dr., lol. I will ask him.

[larry_arizona]

We will be going out on his boat today since ole Ron is at the Dr., lol. I will ask him.

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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