How do i make my SJ turn like my SXR?

JohnnyBravo

JohnnyBravo

JohnnyBravo@Mangawhai Heads
Location
Auckland New Zealand
Vumad said:
Imagine a line following the drive shaft and the ski spinning around that line. Front sponsons stop the roll, improving straight line stability by reducing the roll. They let the water push the side of the ski up so you don't fall into the corner and you can carve harder. I have destroyers $400.

Imagine a line going from top to bottom through the middle of the ski. The ski spins around it like the arm on the compass. Rear sponsons take that sway out of the back end. They improve straight line stability by removing the sway. They also keep the back from sliding out in the corners. I made my own from fiberglass, but you could also cut it out of plexiglass, aluminum, cutting board (like in your kitchen), etc. $15-120. You can also try some of the different ride plates that have channels in them, I have not.

Imagine the ski sitting on a parking hump that goes side to side under the dash. Longer ride plate or hull extensions will take out the porpose. I have a works dominator. Used $100. Works okay straight but no real improvement in the corners. I did try a jet dynamics which seemed better but I didn't get to ride it much.

You are cavitating badly because the stock aluminum prop is a bulky piece of crap. Intake will not help, the stock prop blades are 1/4" thick. It sucks. Replace it.

Don't let my explanations of roll, sway and porpose offend you if you already know what they are. If rather not assume.

In closing, just buy your wife an sxr. I bought one for my wife and she loves it. She can ride my Superjet just fine and did for years before we just got her sxr. The Superjet is great for getting air but she is not going to do any of that. Her sxr is like a Cadillac compared to my Superjet. Unless you wife is seriously racing competitively and wants that hole shot or plans to go aerial, don't try to turn her Superjet into a sxr. Just get the sxr.
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Vumad said:
Exactly. The biggest racing advantage of a SXR over a superjet is rider fatigue. Superjet can be faster for waaaay more effort. I haven't met a women yet that loves our sport enough to make that trade off. And really, is the guy on the superjet that can beat the SXRs faster than himself on a SXR?
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Very informative, considering rear sponsons for my 13 SJ but may look at front as well...do have tubbies, which I love. Will front sponsons still perform?
 
Vumad

Vumad

Super Hero, with a cape!
Location
St. Pete, FL
JohnnyBravo said:
Very informative, considering rear sponsons for my 13 SJ but may look at front as well...do have tubbies, which I love. Will front sponsons still perform?
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Front sponsons will change the ride but they are not as important for racing as the pre-08. The 08+ boats have some amount of front sponsons but they also have a narrower rear end. I believe they have deeper chines but I can not say that for certain. I have limited time on 08+ but I suspect you'd be better off investing your money elsewhere than front sponsons. I'm actually not even sure rear sponsons should be a priority. You may want to start by looking into increasing the steering throw, although that is not all that necessary for the bouy course, but pretty necessary for free-ride. Also if you are trying to do tricks you should know that destroyers are solid fill. They are quite heavy so if you don't need them then I would hold off before you can test ride someone elses ski.
 
N3vrSat1sfied

N3vrSat1sfied

Military Member
Location
Fort Worth, TX
No no no no no...

08+ for racing, then add the front sponsons and the rear sponsons and a good intake grate and ride plate.
The front sponsons make these thing carve so hard and stable.


And definitely get pre 08 steering cable.


Sent from my iPhone using Tapatalk
 
JohnnyBravo

JohnnyBravo

JohnnyBravo@Mangawhai Heads
Location
Auckland New Zealand
Vumad said:
Front sponsons will change the ride but they are not as important for racing as the pre-08. The 08+ boats have some amount of front sponsons but they also have a narrower rear end. I believe they have deeper chines but I can not say that for certain. I have limited time on 08+ but I suspect you'd be better off investing your money elsewhere than front sponsons. I'm actually not even sure rear sponsons should be a priority. You may want to start by looking into increasing the steering throw, although that is not all that necessary for the bouy course, but pretty necessary for free-ride. Also if you are trying to do tricks you should know that destroyers are solid fill. They are quite heavy so if you don't need them then I would hold off before you can test ride someone elses ski.
Click to expand...
Vumad said:
Front sponsons will change the ride but they are not as important for racing as the pre-08. The 08+ boats have some amount of front sponsons but they also have a narrower rear end. I believe they have deeper chines but I can not say that for certain. I have limited time on 08+ but I suspect you'd be better off investing your money elsewhere than front sponsons. I'm actually not even sure rear sponsons should be a priority. You may want to start by looking into increasing the steering throw, although that is not all that necessary for the bouy course, but pretty necessary for free-ride. Also if you are trying to do tricks you should know that destroyers are solid fill. They are quite heavy so if you don't need them then I would hold off before you can test ride someone elses ski.
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Appreciate your reply....when deciding on tubbies, weight increase was considered. Enjoy the overall cornering and seems more buoyant in surf. You seem to know your s#&t, come back to you to answer further questions. Cheers
 
JohnnyBravo

JohnnyBravo

JohnnyBravo@Mangawhai Heads
Location
Auckland New Zealand
Vumad said:
Front sponsons will change the ride but they are not as important for racing as the pre-08. The 08+ boats have some amount of front sponsons but they also have a narrower rear end. I believe they have deeper chines but I can not say that for certain. I have limited time on 08+ but I suspect you'd be better off investing your money elsewhere than front sponsons. I'm actually not even sure rear sponsons should be a priority. You may want to start by looking into increasing the steering throw, although that is not all that necessary for the bouy course, but pretty necessary for free-ride. Also if you are trying to do tricks you should know that destroyers are solid fill. They are quite heavy so if you don't need them then I would hold off before you can test ride someone elses ski.
Click to expand...
 
JohnnyBravo

JohnnyBravo

JohnnyBravo@Mangawhai Heads
Location
Auckland New Zealand
Vumad said:
Front sponsons will change the ride but they are not as important for racing as the pre-08. The 08+ boats have some amount of front sponsons but they also have a narrower rear end. I believe they have deeper chines but I can not say that for certain. I have limited time on 08+ but I suspect you'd be better off investing your money elsewhere than front sponsons. I'm actually not even sure rear sponsons should be a priority. You may want to start by looking into increasing the steering throw, although that is not all that necessary for the bouy course, but pretty necessary for free-ride. Also if you are trying to do tricks you should know that destroyers are solid fill. They are quite heavy so if you don't need them then I would hold off before you can test ride someone elses ski.
Click to expand...
Front sponsons and tubbies are the same thing? Found out they are....
 
Vumad

Vumad

Super Hero, with a cape!
Location
St. Pete, FL
JohnnyBravo said:
Appreciate your reply....when deciding on tubbies, weight increase was considered. Enjoy the overall cornering and seems more buoyant in surf. You seem to know your s#&t, come back to you to answer further questions. Cheers
Click to expand...

Eh, I’m not very smart or experienced. I just get lucky when I guess
 
TheBuzzard

TheBuzzard

Location
the jetski grave yard
kawi kid said:
Bought my girlfriend a mint condition ( less than 10 original hours ) 2007 superjet and i can't figure out how to turn the damn thing. I would like to keep it from sliding around like my 550SX does and get it to actually turn when i lay it over. I know it will never be as effortless as my SXR but i would like to improve it as much as possible. I already know i need a more aggressive ride plate and an intake grate to reduce the horrible amount of cavitation but are there any more simple upgrades to improve handling? Thanks in advance
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1990 thru 2007 superjets were not designed to be layed over like the sxr to get them to turn. they flat turn! don't lay the hull over at all. its all body position
 
kevbo

kevbo

Location
dfw
A little hook on the side is only way for a ski to hold an edge at high speeds. You have to slow down a lot before cornering without it. Its not very useful at low speeds like in the old slalom race. The 750 was the fastest turning flat sided ski, the SJ was easier to ride for 10 long laps.
 
V

Vortex

Location
Southeast
TheBuzzard said:
1990 thru 2007 superjets were not designed to be layed over like the sxr to get them to turn. they flat turn! don't lay the hull over at all. its all body position
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It is a flat turning hull, but there are mods that can be done to let it lay over and allow body drag turns at high speed.
 
mbrick

mbrick

Location
Los Gatos, CA
If your 07 has the stock aluminum prop, put on an 08+ OEM stainless prop. That ended the cavitation for me and was such a big improvement. I think you would be happy with that for her to ride.

I think you also need tubbies if you want to lay it over. But it's just not the same as an 08+ or SXR.

I have both generations and the 08+ just flat out carves in comparison. It is a COMPLETELY different feeling with the hull changes and pump moved back. I like them both for different reasons but the 08+ hooks up way better.
 
V

Vortex

Location
Southeast
Sxr plows over small waves, that's a huge strength thanks to it's heavy hull

The turning style imo favors a "put your weight forward" and lean it over style. My superjet likes to be leaned back which is more comfortable for me, I'm used to that style. If you watch Jacobs from the superjet days he was always way back in the tray.

If you lean back into a turn on a sxr it likes to come unhooked. Just my 2ct.
 
mthomps

mthomps

Location
Cleveland
The ski needs to stay flat while you turn. Your body controls the superjet. You angle the steering where u want to go and your body lean keeps you from falling off. It takes some tray time to figure it out but once you do it is awesome.
 
Big Kahuna

Big Kahuna

Administrator
Location
Tuscaloosa, AL
I raced my SJ from 99-2004. Like Vortex and mthomps said, you have to flat turn them. It just takes practice but let the ski do the turn for you, just keep it mostly flat, hang off the sides. I switched to the SXR after my 2nd race of 2004 after I got to borrow one on Sunday at a race in Macon, GA. I was sold. The Kawi riding style just worked better for me and wanted to drop back from LTD/SS class to something more affordable. Did not have the money to make my SJ a full blown S.S.
 
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