gabbett1
Member
That seems really low for the full shift force. I found a chart that shows exactly what you've listed here. Says preload is 35 kg and total force is 101 kg. Interestingly, (although probably not what you should do) if you add 101 and 35 to get 136 kg and convert that to lbs, it comes to 299 lbs. Which would be about the same as what I was running.
gabbett1
Member
What does the spring rate mean and how does it play into the overall rating of the spring?
The spring rate is kind of strange. It depends on the wire dia. number of coils. overall length. The spring rate can be all over the place going up the scale on a spring chart.
The best tuning info is the lbs of force at given height. Heights are generally spec with spring cover installed 2.5" and 1.25" with polaris springs. At engagement and at full shift out in inches and lbs force.
The best tuning info is the lbs of force at given height. Heights are generally spec with spring cover installed 2.5" and 1.25" with polaris springs. At engagement and at full shift out in inches and lbs force.
gabbett1
Member
It's been a hot minute since I've post on here. I think I'm close, but can't seem to get the last bit of it figured out. RPM's are holding nicely now. There's no dropoff and it hits RPM target almost immediately. I'm not able to make any speed though. Pulls really hard till about 60mph and then slowly climbs to ~85+mph. It's still climbing, but slowly. My Skidoo 850 gets to 100 mph in about 2/3 of the distance. My friends stock SRX is faster than my 850 so I can't imaging there's that much difference between a stock SRX and my piped and modded SX.
I did change my secondary spring from a yellow (35-85 lbs of force) to a red (60-116). It helped for sure, but the increase was minimal. This red spring is the same one that was in the snowmobile when it was fully modded years ago so I can't imagine I need to go even heavier.. I'm just at such a loss.
I'm still running a 49 degree helix. As I said before, it was the same helix angle as my friends SRX. I suppose I could try different helix angles, but they are not easy to change.
I really don't think that bearcat secondary is doing you any favors. It is built for utility low speed work and the extra large diameter is throwing off the shift ratio all the way up. It is so large that your primary will likely not close up totally. It you could find an old eltigre secondary to try...I think you might have better luck.