Not Getting Good Push!

[sandm]

jon,
was on sti's boat this weekend. wave was short-ish in height and not much push but tons of potential tho based on the initial shape and curl it had
you mention the autoflow settings at 60 and 70%. are those adjustable or do you just flip the switch from side to side? an adjustment in the lcd screen possibly?
good info to help dial it in.

[Jon]

sandm,

Yes, both with the Auto Flow and the Auto Flow 2 you can adjust the percentage using the Digital Cruise Pro 2 Screen. You press Menu, then go into Vessel Settings. On that screen you see the percentages for port side and starboard side surfing. You can adjust these percentages by 5% at a time. The cool thing is you can do this while running. What I like to do is set my speed, ballast, wakeplate, etc, then get the boat up to speed. Once up to speed, go into Vessel Settings and start adjusting while looking at the wave. You will definitely see it when you know it's good. Again, lower percentages than factory position makes the wave steeper and taller while higher percentages make the wave longer and more mellow.

[sandm]

good to know.
is the dig. cruise set up to have auto select buttons for surf and skim? in other words multiple presets? since you list surf riders might want one setting and skim riders might want a different setting.

thx.

[Jon]

No presets on the Moombas. You will just flip the switch to the side you surf on and then can modify all the variables on the boat to shape for more of a skim or surf style wave.


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[goose]

I will jump in on this thread also....

On the one comment about the bow bag, I think sometimes people get confused on how bow ballast and rear ballast work together. I think some people view the boat as a teeter-totter or see saw, where if you add weight in the bow, then it automatically takes away from weight in the rear. That isn't exactly how it works. Adding weight anywhere in the boat displaces more water. That displaced water eventually leads to the wave or wake created by the running surface. So, if you have 2000 lbs in the rear of the boat and you add 1000 lbs to the front, the boat is going to displace the weight of the boat, plus the 3000lbs of extra weight. If you don't have the 1000 lbs of weight in the front, then you are not going to displace as much water and the wave or wake will be smaller. The shape of the wake or wave is dictated by the angle of the boat moving through the water and where that weight is in the boat dictates that angle. So, yes, in some aspects, the weight in the front and the weight in the back can conteract the overall angle, but the overall amount of boat weight moving through the water is a combination of the front and rear ballast. Not sure if that makes sense in how I described it, but that is why front and rear weight is important. Plus, as Jon said, having the front bag also helps when you have too many passengers all sitting in the rear. When you have too much rear weight, the angle of the boat is too steep and if the angle is too steep, then the wave will be too steep and eventually curl over. In the opposite manner, if you have too much weight in the front, then the angle of the boat will not be steep enough and the wave will be super long, but it will have no push. In regards to the AutoFlow plates and wakeplate, if you have too much weight in the front or the rear, then the plates can NOT overcome the ballast effects and the wave or wake might not be able to clean up without first fixing the ballast location.

Ok, I am not sure if that helps or hurts, but hopefully that, along with Jon's comments and suggestions should help get you guys dialed in with these new systems.

[07STI]

Matt - That does all make sense and I appreciate the feedback. With all the different factors (front/center weight, rear weight, speed, rear weight, and weight/location of passengers), it's just tough to try to translate that all together. We'll have to continue playing around and try to get some real-world data into a thread.

[BamaMojo]

Great info.

I'm a little confused about the bow bag though. My Craz did not come with the optional 500# bow bag. Based on what you've noted, if I had the 500# bow bag, that would really only serve to lengthen the wave and not provide much push (all other things being the same as stock). So is the bow bag really needed? If I upgrade rear bags, that should increase the height and corresponding push. However, if I also add weight to the bow, that will lengthen the wave and make it shorter (height perspective)...essentially counteracting the increased rear ballast?

My hope is that if I go from 650's in the back to 1,100's, but also add 650 to the front, the net 300# increase in the back will be enough to keep a relatively long wave, but also increase height/push. I'll have the ability to reduce the front weight if needed, as well as adjust the autoflow setting.

Do you have any recommendations for upgrading the bags?

Thanks

Go as heavy in the bow as possible. I have a sumo 750 in my Mojo, I also add 400 on top as well.


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[goose]

It definitely is a challenge trying to get all the variables together and it might take a little trial and error to get it all dialed in, but actually the process of dialing it in will help you in the long run. I tell my son all the time that sometimes success comes from failure, and by getting it wrong and then seeing how you adjust one variable changes things, it will help you as you start adding more passengers or when you are on someone elses boat. Good luck and keep us posted with how it all turns out.

[07STI]

Will do. I am looking forward to it and it's great to have a better overall understanding of how the variables interact. With knowing at least 2 of the variables (rears at 100% and speed around 10.5), that significantly decreases the # of combinations we need to play with.

[Isaguel]

I was also entertaining the idea of upgrading the rear bags in my mojo, to 1000 lb bags. I have a question. Right now, to my surprise, the digital display that shows the level of water in the bags is pretty accurate. If i put bigger bags in, does that mean the digital fill gauge will be off by 250 lbs? Do you adjust the settings somehow on the display?