My little NSS project - 99 SN

[High altitude]

Well the testing phase has pretty much wrapped up…and I’m ecstatic with the progress. I now have a surfable wave on either side of my boat. The switch out takes 3-5 minutes max, allowing for the movement of my NSS wave enhancer, a small amount of water weight, plus 180 lbs of John Deere tractor weights.

Obviously, my original intent was not met…because I can’t evenly weight the boat. With that said…this wave is so much fun! I was 15 ft back dropping in down the wave with enough speed to get past the rear of the boat (on the side). The wave has a ton a push, is pretty clean and just a blast to surf.

The weight remained the same as my previous posts except I was able to add 200 lbs of human weight to the rear and surfsie. The weight does make a big difference but it also works fine with just two of us (one driving and one surfing). The “normal” side or port side wave is still less desirable than the goofy side. The prop rotates right and it makes a difference. This can be compensated for with extra weight. I was able to go ropeless no problem but since I am a goofy rider I never quite felt comfortable on the port side. Here are the pictures:
The standard side is self explanatory but it was very windy thus some of the cleanliness of the wave was washed out.
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The goofy wave has my 10 yr old neighbor on a standard surf rope (25ft?), just before he tossed the rope in.
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As for pics of the NSS itself, the dimensions are 1 1/8 inch horizontal displacement. I didn’t measure the rest but I think you can tell the rough dimensions based on that one measurement. I might do some very minor mods, but I’m so pleased right now that I probably will just ride most of the summer and leave the tinkering until fall.
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[s_kelley2000]

Cool stuff, thanks for sharing. It definitely looks effective.

[nyryan2001]

Awesome!! Love it!

exactly what boat do you have? Is it DD or Vdrive?

[High altitude]

A 1999 DD Ski Nautique (closed bow). I have done some mods to it. I have a ski pylon that extends about 3 feet. I also built a sundeck that covers the rear and side fat sacs. It only weights about 80 lbs total so it doesn't really effect the ski wake at all. It's nice having all the sacs hidden and out of the way. I also plumbed three Johnson pumps and put the rocker switches right by the throttle.

I plan on starting another thread sometime soon about the sundeck/fat sac setup. I haven't yet because I have a small amount of upholstry work left to do. -Marc

[s_kelley2000]

Would you mind taking a picture of the unmounted device sometime when you have it removed to switch sides or slalom? And perhaps a shot of the platform with the device off it? I'm not too keen on drilling the holes into my platform but your results look like they are worth it. If the wave can get that big and clean with a Ski then I imagine a Super Sport could get even better. Thanks for experimenting and sharing your results.

Your sundeck/fat sac setup sounds pretty cool. I look forward to seeing your thread on that as well.

[High altitude]

Shawn,
Try looking at the pics on page 1 of the thread. I think that might be what you are looking for. If not, post or PM the specific shot you are looking for.

I would fully expect a SS to be even better. Do you have a bow sac? No doubt in my mind I have to have more weight forward than I used to (pre- knockoff NSS). -Marc

[s_kelley2000]

Ya woops, all the pics I was looking for were on page 1. I had been reading the thread from the beginning but must have missed those pics while looking on my phone. I'd love to see some video if you have a chance to grab any this summer.

Yes I have plenty of bow weight between the integrated bow sac(fills to about 350-400) and a 600 lb sac in the belly locker as well as a plethora of other sacs I can move around plus 750s in each rear locker. I wakeboard 90% of the time and have that wake dialed pretty well but I'm still figuring out the surf wave. It seems to work best when I leave the integrated bow sac empty, belly locker 3/4 to full, surf side 750 full and a 400 lb sac or passengers on the rear surf side seats. This makes a tall clean wave but the sweet spot is really close to the boat. I know adding bow weight should lengthen the sweat spot and push it back which it does but the wave gets much shorter and washy and really doesn't have enough push. I think I need more weight in the back to counteract the additional weight of the integrated sac but I am not sure I can squeeze much more water ballast on top of the 750 but I am going to try adding a 300 on top. But if I could fill both rear 750s and use an NSS-type device I think I would have something big with a nice long sweat spot that I am looking for. I wish there was a way around drilling holes in the platform but I think it is a necessary evil. If I can get past that I will be sure to post up my findings and results. My apologies for getting a little bit off topic.

[High altitude]

Bow weight really hurt my wake until I installed my "NSS knockoff" plate. Then it became essential. I thought I remember somebody with a real NSS system that said something similar. (nyryan...if you are reading can you comment?)

You should have plenty of weight to get a very nice surf wave. Drilling the platform does stink but I think it was well worth it. I'll try shoot some video next time I am out. I wish I had my phone with me last weekend. Since it was father's day my family let me surf until I could hardly stand-up anymore. Unfortunately, my lake is still only 63 degrees so I'll still be surfing in my drysuit! -Marc

[dfoster]

I've been thinking of fabing up something like this for the back of my SV. With the metal swim platform mounts, I think I could drill a couple of holes through that and bolt a brace to that. This method would avoid having to drill up through the swim platform itself.

Also, on the back of my SV the surface isn't flat... it is stepped in at the bottom. I will try to get some pics to post, but is the back of your boat flat? It steps in about an inch or so, so I'm not sure if I would need to build out the plate so that it follows the step in the back of the boat, or if it would be ok to have a gap.

The goal of an interceptor plate like this is to just build up pressure, so in theory I think it would be ok to have a simple flat plate and leave a gap. I have a good engineer friend coming on the 4th of July so may have him noodle on this with me.

Shawn, if you need a hand, let me know. I know you are fairly local and I would be glad to mess around with this together to see what we could do. - Doug

[s_kelley2000]

Thanks for the offer to help Doug, I just sent you a PM.

Your idea to mount it to the swim platform brackets has got me thinking and I may have found a good solution to avoid drilling holes in my platform. I need to check it out but my boat has the lift rings under the platform (previous owner removed the transom cups) so I am wondering if I could use a combination of the lift rings, recessed space in the platform above the lift rings and the platform brackets to secure it. More ideas to ponder but not sure I will get around to experimenting this summer or not.

[Russell]

Hello from Portland,

i just found this conversation, and am curious if you guys may offer some guidance. I have a 1999 Sport Nautique dd. I’ve been doing exhaustive searching across the forums, looking for someone doing or having completed a wake shaping/delayed convergence solution for this boat. I don’t know if the Ski Nautique has the same hull as the Sport Nautique. I currently run about 850 lbs of ballast in my trunk, and produce a reasonable wake, that gets cleaned up nicely when using Mission Delta. My challenge is what to build for an automated system that allows for transfers. I foilsurf, so my ballasted wake is fine for foiling. I probably couldn’t surf in the traditional sense with the modest ballast I run. But that’s okay; foilsurfing is “my happy-place”,

Given the fact that Mission Delta has proven that it works, that should end my curiosity. I prefer the concept of NSS or a surftab (GSA or something similar). Surfgates aren’t my preferred approach, unless that’s what will work better in my case. I’m told that NSS and surftabs require more ballast to be effective, whereas surfgates will perform with less ballast required.

This thread I’m on would have me believe I may be able to achieve good results with an NSS-type approach. I’ve mocked-up an NSS test device that follows the contour of my hull/transom, and currently has blade deployment length at 2.25” down, and 2.25” out to the side. I think someone on Wake Garage used those deployment specs. I’m about to try this 1st concept, and would love to find anyone who’s played with this boat/hull. If it matters, I typically surf on the port side (regular), but notice goofy side has nice potential because of prop rotation. I’m only fabricating the NSS to test the concept, mounted on the starboard side. Since I spend the majority of time riding that side.

Thanks in advance,
Russ