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Center Shock question.

stinx

Expert
Joined
Feb 10, 2004
Messages
350
Location
Massachusetts
What effect on handeling does softening the center (front)shock in the skid? My owners manual did nt say or I missed it.
 

I actually just did this and it took ski pressure off. I have an RTX SE that I stretched to 136 and it was hard to turn Now when I blip the throttle the skis come up slightly.
 
so is this a better way on a se to reduce ski lift under throttle for better cornering as appossed to pulling down the front limiter strap
 
Dirk - I believe you increased (stiffened) the preload on your center shock. When the center shock spring preload is increased (stiffened) it raises the front of the rear skid and takes weight off the front of the sled. When the center shock preload is decreased (softened) the front of the rear skid will sag more allowing more weight to come down on the front of the sled. The center shock also acts like a pivot point for weight transfer. When the center shock has more preload (stiffer) the sled will rock back more upon acceleration and lift the skis. When the center shock has less preload (softer) it will collapse under acceleration and not allow the sled to pivot back as much thus decreasing the transfer effect. The limiter straps also play a role in all this along with the coupler blocks.

The longer the limiter straps are let out (stock Nytro's are in the max position in regards to this in stock form) the more transfer you will get as it allows the front of the skid to sit taller and when the straps are lowered (shorter) you get less transfer as the pivot point is now lower. The coupler blocks (non adjustable on a stock Nytro) are the stopping point for when the transfer happens as when they touch the rear arm it forces the entire skid (both ends) to move upwards thus ending the transfer motion. Adjustable couple blocks are available from Ulmer Racing and other vendors if you are wanting to limit the transfer in that method. One down side I see to the thicker coupler blocks is that they shorten the amount of time the skid can ride independently on each shock which is what gives a good stutter bump ride. As with all suspensions adjusting one thing always involves a trade off in another area. Hope this info helps in regards to tuning your skids.
 


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