Psi in fox float evolutions

[RtxViper]

I'm setting my brothers sled up as he doesn't; know what he is doing I am wondering what pressure you guys are running in your fox floats. He has the evolutions with the extra reservoir. It steers extremely heavy. I have since set all the adjustments back to the middle and am going to give it an alignment tonite. It has cna razor skis with 6" shapers on it. The sled is a 2009 xtx. Thanks for the help

 

[krysFly]

85 is working the best for me, I tried all different setting. Im 200lbs

 

[dansranger]

I have an SE, with stock skis, and the evol's. I'm running 55.

 

[RIPP RACING]

90 psi seems to work best for me 220 lbs

 

[yamahas]

I have 55psi in my main chamber and 150 in the extra chamber on my phazer, hopefully this will give you a good place to start on the nytro.

Could it possibly be the the limiter strap is too tight putting too much weight up front?

 

[lukesju]

I run 220 in the Evol and 115 in the piggyback. Never bottomed it out!!!!

 

[RtxViper]

He weighs 150lbs with his gear. I set all shock adjustments in the middle moved the center shock up a quarter inch, gave it an alignment and shimmed the skis. I will start the skis at 60 psi and go from there. Thanks for the help!

 

[nate007]

By moving the center shock up, you've effectively put more weight on the front end, and it may make heavy steering worse.
With the Razors, my vote is for lighter ski pressure, regardless of pressures, and OFT steering relocator. There's lots of praise on this site for that part making steering easier.
I've got Evol X's on my Apex, but honestly would have to refer to the book for some of the adjustments beyond the low pressure side. The low pressure side is simply an air spring, with little to no effect on actual dampening. It's no different than turning the spring adjusters up on a coil over shock, but when air is added to the shock and the center shock is shortened, it "bridges" and gets very hard to steer! Get the book for your particular shock(s) and avoid messing with too many things at once. S all adjustments will be easier to remember what makes the differences.

 

[LJ 452]

Seems to be a bit of confusion on which Float does/has what adjustment.

Float 1&2:
Standard air spring shock with a single air chamber. These are the floats that we're found on the Apex RTX, Nytro RTX, and Phazer RTX. Adjusting the air pressure will, as mentioned effectively act the same as tightening a coil spring. These shocks are very progressive, as the amount of travel increases the area of the air chamber decreases, as a result the air pressure is increasing exponentially.

Float X:
This is a standard single air chamber shock with a piggy back single speed compression clicker attached. The shock also has rebound adjustability.
These shocks were standard on the 09'/10' Nytro RTX SE, now called RTX. They are very adjustable in that you not only have the air spring but also both compression and rebound adjustment clickers as well. The piggyback is no different than on a coil shock in that it holds additional oil and aids in reducing shock fade.

Float Evol / Evol R:
These Floats have an additional air chamber (looks like a small rese) that is pressurized independently from the main chamber. The name "Evol" is derived from "Extra Volume", the Evol R beeing "Extra Volume Rebound" in that you also have rebound adjustability. There is a method however, the "Main Chamber" needs to be adjusted first then the Evol chamber can be adjusted. The main chamber is your air spring, while the Evol chamber acts as an anti bottoming aid. This allows you to run lower pressures in the main chamber which allows for more use of travel and a more compliant ride while maintaining the anti bottoming characteristic of the Float 1/2. The "R" version simply adds the adjustability of rebound adjustment, there is no compression adjustability nor is there any rese/clicker with additional oil. Currently no Yamaha sleds are offered with these in stock trim, and I believe no other OEM offers them as well.

Float Evol X / RC2:
These would be the higher end Floats, they are essentially a combination of the Float X and Float Evol R, with the RC2 version having dual speed compression adjustability. Yes that's five (5) areas of adjustment without breaking open the shock. Main chamber for air spring, Evol chamber for anti bottoming, hi-low piggyback rese for compression adjustment, and a rebound clicker. These shocks are available aftermarket, race sleds are the only sleds that currently offer have them stock.

I've had the first three versions and as of now liked the Float X the most for all around trail riding. However this season hasen't really started yet so the Evols haven't had a ton of adjustment time. The thing to remember is that the main chamber ultimately will determine ride height, the internal valving will determine plushness of the ride. Lowering the pressure may soften the low speed feel but the softness or firmness of the shock is ultimately determined by the valving. You should run the float as low as possible without bottoming, yes there are exceptions to this but for smoother trail riding this will provide the best expireance. This will give you the lower CG, and utilize the most travel, if the ride is still too rough a revalve is probably needed.

As for your buddy, he has what may be the heaviest steering sled made, then added the second most aggressive ski to it. Honestly at his weight he should sell the skis and get a pair of Curve's or something similar IE less aggressive. Yes there will be a slight loss in corners but his arms and shoulders will actually survive the ride. The only other way to offset the ski would be to lengthen the front limiter all out, tighten center spring, and tighten rear arm strap, this should rock the sled back and effectively take weight off the skis. However you've then just done the opposite of what typically provides the best handling on the Nytro. It will probably be a ski poping machine at every corner.

It's all give and take.

 

[dremmick]

I also have the C&A with shapers. Im 210 and have my float x's set at 70 psi. I only had a chance to use it last year in 15inches of front snow and loved them. Have not used them on hard pack yet. I did install the OFT relocater this year which should help.

 

[RtxViper]

Seems to be a bit of confusion on which Float does/has what adjustment.

Float 1&2:
Standard air spring shock with a single air chamber. These are the floats that we're found on the Apex RTX, Nytro RTX, and Phazer RTX. Adjusting the air pressure will, as mentioned effectively act the same as tightening a coil spring. These shocks are very progressive, as the amount of travel increases the area of the air chamber decreases, as a result the air pressure is increasing exponentially.

Float X:
This is a standard single air chamber shock with a piggy back single speed compression clicker attached. The shock also has rebound adjustability.
These shocks were standard on the 09'/10' Nytro RTX SE, now called RTX. They are very adjustable in that you not only have the air spring but also both compression and rebound adjustment clickers as well. The piggyback is no different than on a coil shock in that it holds additional oil and aids in reducing shock fade.

Float Evol / Evol R:
These Floats have an additional air chamber (looks like a small rese) that is pressurized independently from the main chamber. The name "Evol" is derived from "Extra Volume", the Evol R beeing "Extra Volume Rebound" in that you also have rebound adjustability. There is a method however, the "Main Chamber" needs to be adjusted first then the Evol chamber can be adjusted. The main chamber is your air spring, while the Evol chamber acts as an anti bottoming aid. This allows you to run lower pressures in the main chamber which allows for more use of travel and a more compliant ride while maintaining the anti bottoming characteristic of the Float 1/2. The "R" version simply adds the adjustability of rebound adjustment, there is no compression adjustability nor is there any rese/clicker with additional oil. Currently no Yamaha sleds are offered with these in stock trim, and I believe no other OEM offers them as well.

Float Evol X / RC2:
These would be the higher end Floats, they are essentially a combination of the Float X and Float Evol R, with the RC2 version having dual speed compression adjustability. Yes that's five (5) areas of adjustment without breaking open the shock. Main chamber for air spring, Evol chamber for anti bottoming, hi-low piggyback rese for compression adjustment, and a rebound clicker. These shocks are available aftermarket, race sleds are the only sleds that currently offer have them stock.

I've had the first three versions and as of now liked the Float X the most for all around trail riding. However this season hasen't really started yet so the Evols haven't had a ton of adjustment time. The thing to remember is that the main chamber ultimately will determine ride height, the internal valving will determine plushness of the ride. Lowering the pressure may soften the low speed feel but the softness or firmness of the shock is ultimately determined by the valving. You should run the float as low as possible without bottoming, yes there are exceptions to this but for smoother trail riding this will provide the best expireance. This will give you the lower CG, and utilize the most travel, if the ride is still too rough a revalve is probably needed.

As for your buddy, he has what may be the heaviest steering sled made, then added the second most aggressive ski to it. Honestly at his weight he should sell the skis and get a pair of Curve's or something similar IE less aggressive. Yes there will be a slight loss in corners but his arms and shoulders will actually survive the ride. The only other way to offset the ski would be to lengthen the front limiter all out, tighten center spring, and tighten rear arm strap, this should rock the sled back and effectively take weight off the skis. However you've then just done the opposite of what typically provides the best handling on the Nytro. It will probably be a ski poping machine at every corner.

It's all give and take.

Agreed! He had these skis on this sled before and tried some slydogs and he hated them thats why he has the cna's back on and yes he does know they are a little to aggressive for that sled. I put all the settings in the middle to start over and adjust from there. The alignment was off and he did try to order the oft steering relocate but as others have stated they are out on winter vacation somewhere so I am just trying to give him a hand and help him out as he is lost. Not my sled of choice obviously thats why I have an apex

 

[stopdropanroll]

He has the Evol X, same shock that comes with the SE Nytro.

 

[RtxViper]

He has the Evol X, same shock that comes with the SE Nytro.

Get that kitty cat back together so we can go riding tomorrow!

Thanks guys for your help hopefully things are better for him this weekend