Super Jet 2011 superjet, all stock very unstable ride

[DrGonzo]

I have an 08 I bought stock. I notice it at 3/4 throttle when it is glass and only on glass. For me its like snow skiing at the end of a powder day. You either edge through the crud or let your skis bounce around and enjoy the ride. Am I the only one who purposely chine walks? There is something oddly satisfying about the bouncing back and forth. I normally do it when I get tired and stand up straight. A little throttle always fixes it if you get into issues.

 

[aytee]

Am I the only one who purposely chine walks? .

Haha... Guilty!

sent from inside a beer can

 

[Half flip95]

Update on my post, I put a stock length delivery cut oem ride plate on my ski and have not experienced the off throttle / deceleration crazy wobble that I think most are talking about. It used to be very common and I could provoke it every time I let off the gas from going any significant amount of speed. This is after three days of hard riding and I am literally shocked that my ski doesn't do it anymore. At least certainly not as easily.

And also for my 155# weight I've seen no negative drawbacks from the d cut stock length plate. Ski feels a tad more nose high overall but high speed carving is not impacted at all. At low speeds it's easier to get the nose up and do tighter turns with the nose up too. Jumps way easier, it doesnt launch as flat as it did. Better overall rec plate for me no question.

By d cutting the ride plate you drastically reduced nose pressure. I can guarantee you that the "high speed carving" abilities have been compromised. Good for rec riding, not good for going fast.

 

[theVetteman3]

Well, I will agree that nose pressure has been reduced. I would not say drastically though, at least with the stock length. It probably went from a 6 to a 5, 4 at the least, on the nose pressure scale. The ski still rides around with a very similar feel.

For my weight, there was no reduction in carving. It makes sense to me that heavier riders will need more nose pressure to accomplish the same thing. Same entry speeds, same amazing cornering grip, no swapping ends or feeling that the rear is coming unglued. Seems to me the ride plate corners are really the critical part, just like hull extensions. They nail the rear down. The extra plate surface area no doubt helps push the front down, but on really fast corners I lift the throttle for a split second as I'm initiating a turn (as I always have with a full plate), and the weight transfer locks things down and it's as solid as a rock. I'm pretty picky with my SJ's handling too, if there was any negative reduction, I'd put my stock plate back on. I've also got a flush cut, d cut plate to try. That I'd definitely think there'd be some high speed turning reduction.

Anyway, for my riding and weight, the stock length d has no reduction.


Oh and also I don't mind the chine walk of the ski at all. You get used to it, that's just the eager feeling of the hull wanting to be doing something. The death wobble is a much more violent side pitching back and forth, which for me happened only during deceleration like I said.

 

[Half flip95]

well I think you just lost two points on the credibility scale.

 

[theVetteman3]

I'm not here to start a fight. I am a mechanical engineer with 10 years aerospace experience and I am a trained objective observer on mechanical systems. I'm simply stating what I've felt, personally, on my ski. So if you somehow think my objective observations have lost two points on your own personal credibility scale, well then so be it. That's something I can live with.

I counter by saying my ski had too much nose pressure to begin with, given my weight and ski/ riding circumstances, and d cutting the ride plate has reduced it to a better overall balance for the ski and my weight. As I said above, the d cut has no doubt reduced nose pressure on my ski, I agree with you there. However it has decreased it to an amount which still provides a sufficient amount for my carving and high speed turns.

So lets say the ski has 500 units of nose pressure to begin with, and I need 350 to accomplish what I need to in turns. The D cut has reduced it to 450. Less, but still sufficient for my needs. I can report back once I've tried the flush, d cut plate. I do accept that change might bring it down to 300 or less, and therefore wont be my regular rec plate and I'll go to it only for wake jumping.

But sheesh, unnecessary argument and I'm sorry I decided to post up my observations. Lets get back to the thread topic.

 

[Half flip95]

well mr. mechanical engineer, "simply stating what you felt" is the opposite of objective
are you sure you know what you're talking about?
you're at -3 now BTW

 

[theVetteman3]

Lol.. I said objective observer. Observer being the key word there. Knowing how to relate what I'm actually feeling to the physics involved is pretty straight forward to me. Peace out dude, I wish you all the best.

Based on what I've seen, I think the death wobble is from water hitting the tubbies weird like others have said. Less nose pressure reduces how much the tubbies are in the water and the new impact from them. Strong deceleration is the opposite and might cause them to hook harder. Cutting the rear bond rail to be straight thru would cause the rear to sink the same way as a d cut.

 

[Half flip95]

I'm just having some fun with ya

 

[aytee]

. Cutting the rear bond rail to be straight thru would cause the rear to sink the same way as a d cut.

So basically you just posted 4 or 5 times to tell us all we don't need to be engineers to figure it out??

sent from inside a beer can

 

[theVetteman3]

So basically you just posted 4 or 5 times to tell us all we don't need to be engineers to figure it out??

sent from inside a beer can

Ha maybe. It does look like that. I didn't figure I was saying anything too revolutionary. So then I backed up what I'm feeling on the ski with a kindergarten grade physics explanation. Just so if any kindergartners were reading they would understand too.

 

[aytee]

sent from inside a beer can

 

[theVetteman3]

That's pretty funny. Believe it or not, I really haven't been criticised of that outside this forum. Quite the opposite in fact, frequently I say pretty much anyone can do most of what I do at work.

Maybe that's why they freak out when they learn I design parts for the planes they fly on.

 

[augustaf]

I like to get this thread back on track. Why can't people admit that the Emperor is not wearing any clothes? On smooth water- and unless you get the nose up by hanging your butt out over the back-, 08-up is very unstable. Certainly not consumer friendly to newbies.

 

[Half flip95]

I like to get this thread back on track. Why can't people admit that the Emperor is not wearing any clothes? On smooth water- and unless you get the nose up by hanging your butt out over the back-, 08-up is very unstable. Certainly not consumer friendly to newbies.

Quotes off the side of the vessel "race performance" "competition use only" not quite as beginner friendly as the sxr but first time riders will be able to cut buoys much better than they would on everything else that came before it

 

[Zeus87]

Any conclusion to giving this boat a little bit more stability on the straights? I was considering trying the prowatercraft hfc plate, but I don't want to spend $200 unless it's going to help.

Thanks

Sent from my SM-G900P using Tapatalk

 

[Joeggernaut]

My pre-O8 seems to porpoise a lot and I can't get the nose down. I tend to ride staggered footed (one foot forward) to try and get the nose to stay down so it can stay connected in mild chop. I weight 190 6-1 stock ski. Any suggestions? Someone said you can adjust nozzle angle. I do tend to notice the wake being somewhat tall for such a small ski.

 

[Jhucke]

My pre-O8 seems to porpoise a lot and I can't get the nose down. I tend to ride staggered footed (one foot forward) to try and get the nose to stay down so it can stay connected in mild chop. I weight 190 6-1 stock ski. Any suggestions? Someone said you can adjust nozzle angle. I do tend to notice the wake being somewhat tall for such a small ski.

Ride the ski more and you'll figure out how to handle a standup. Between the X and facebook, it seems like this question gets asked once every 15 minutes, you're just a noob. Try leaning different directions, you don't HAVE to be in surf stance for a superjet to be stable. A lot of the time it's as simple as standing straight up as far forward in the tray as possible and you can cruise for hours on the old superjets.

 

[Joeggernaut]

Ride the ski more and you'll figure out how to handle a standup. Between the X and facebook, it seems like this question gets asked once every 15 minutes, you're just a noob. Try leaning different directions, you don't HAVE to be in surf stance for a superjet to be stable. A lot of the time it's as simple as standing straight up as far forward in the tray as possible and you can cruise for hours on the old superjets.

Thanks, yeah I only have ridden once for 2hrs so defn a noob. Much different than sit downs but already a ton more fun.