looking to trade gytr shocks for floats

[ahicks]

<<<the IFP type shock absorber can never be valved for serious amounts of compression damping >>>

Good point if you are talking about some REALLY hard riding. The resi. could easily double the compression damping ability if needed, but thinking you're talking about maybe 1 in 500 riders may need/be able to effectively use that kind of capacity/capability? At that point the extra oil capacity offered by the resi would also be in play.

 

[Alatalo]

<<<the IFP type shock absorber can never be valved for serious amounts of compression damping >>>

Good point if you are talking about some REALLY hard riding. The resi. could easily double the compression damping ability if needed, but thinking you're talking about maybe 1 in 500 riders may need/be able to effectively use that kind of capacity/capability? At that point the extra oil capacity offered by the resi would also be in play.

The IFP type shock absorber can only create as much compression damping as allowed by the level of nitrogen pressure. In this type of shock absorber, all of the compression damping is created by a pressure reduction through the main valve. The starting point for this pressure reduction - the pressure that is being reduced - is in fact the nitrogen pressure. When the pressure reduction comes close to the level of the nitrogen pressure, the pressure on the "rebound side" of the main valve comes close to zero. Then the shock absorber cavitates, pushes the nitrogen piston instead of creating more compression damping and eventually collapses.

The reservoir type shock absorber, or more correct - the shock absorber with an additional compression valve between the main valve and the nitrogen reservoir, does not have this problem. In this type of shock absorber, the compression damping is created by a pressure increase through the additional compression valve AND by a pressure reduction through the main valve. The starting point for the pressure increase followed by the pressure reduction is again the nitrogen pressure. By valving for different pressure increases and pressure reductions, one can basically decide the pressure on the "rebound side" of the main valve. By balancing the pressure increase and the pressure reduction to be the same, one can decide that the pressure on the "rebound side" of the main valve is always the same as the nitrogen pressure. Thus, unlimited levels of compression damping can be created - without making the pressure on the "rebound side" zero, without making the shock absorber cavitate and without making the shock absorber eventually collapse.

Again, this is the main reason why IFP type shock absorbers are never used in performance vehicles.

I would say that this makes quite some difference for much more snowmobilers than one out of fivehundred. Simple calculations combined with knowledge about the compression damping used in some of the current models clearly shows this. For instance, none of the high-speed compression damping levels used in any of the shocks in the current snocross replicas (including my own SE) would be possible to create with IFP type shock absorbers, unless you want to use extreme levels of nitrogen pressure, then causing a number of other drawbacks...

 

[ahicks]

Alatalo,
Not arguing the potential for a resi to increase compression damping capabilities. Already agreed with you there.

I have a dual stage progressive stack on my Floats that works pretty good, for my purposes. Know others that have been revalved, and they're working pretty well too. Maybe they are cavitating, I don't know, but they work, and I ride pretty hard on occasion. I've been just as succesfull with other IFP shocks - that are trail ridden. Not talking special use stuff here (racing, jumping).

IMHO, a front shock with resi's, for most trail work, the resi is overkill for most riders. That's my only point. Are they hurting anything? No. I just don't place them very high on my own "want list". Rear shocks are a different story!

 

[tomseal6]

When I bought my 09 RTX, I had the dealer take off the floats and put on the GYT shocks from his personal XTX or I wasn't buying the sled.

 

[EsonPZ]

I have had mine revalved with pioneer performance parts, and now i think they work great!
With stock valving they were awful!

 

[tapp1]

I have had mine revalved with pioneer performance parts, and now i think they work great!
With stock valving they were awful!

I am thinking about doing the same thing? Did you have all 4 revlaved or just the front floats? Much softer?

Thanks

 

[EsonPZ]

I had all 4 revalved. Before the revalve they were incredibly stiff. The front end bounced over stutterbumps. Now they work like a shockabsorber shoud! Big improvement.
Since im from Sweden, my floats may have a diffrent valving compared to what you get in norh america. (We usually get harder shocks from the factory over here.)

 

[sheetwright]

Here you go. This is what the site is for
http://www.ty4stroke.com/viewtopic.php?p=658197#658197
Hope it helps, If they are standard you could always add resevoirs from Yamaha or aftermarket

 

[dieselmatt1]

still have them