Where did you find a 140/280? Dalton?
858 Updates Coming from AC????
- Thread starter Chewy22
- Start date
Venom makes a 140/215 that's the one I was meaning. Green/blue
With the fancy G8, why isn't the technology there just to download the calibration update over the air through wi-fi or whatever? Cat has limited dealers and 4-6 hour round trip drives for a procedure that takes 15 minutes makes no sense.
It looks cool and all but I am in agreement with Ryan Harris as far as guages go.
It looks cool and all but I am in agreement with Ryan Harris as far as guages go.
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Straight 48 on a mountain sled for high altitudes? Thats just crazy. I would go for straight 42 or 40 even.
Helix angle and what a sled will pull is related to a bunch of different things: power output, spring rate, helix diameter, clutch diameter, final gear ratio, driver diameter, track load (lug and length), etc. The Arctic Cat secondary uses a pretty large diameter helix in comparison to some other designs. Cat also has a low final drive ratio of 2.63. This is quite a bit lower than the Polaris QD ratios. So a steeper helix than one might think seems to be warranted. On the old Ascender chassis dropping to a 45 degree seemed popular. 858 might pull the 48 fine in some conditions.
That being said the stock clutching calibration seems to be off the mark for a lot of people.
That being said the stock clutching calibration seems to be off the mark for a lot of people.
I get your point your trying to make, but 48 helix is still really steep (for deep snow riding) no matter how short the overall gearing is. Cat has drivers on 3,5" pitch with 7 teeth. Its much faster than Doo with 6 tooth with same 3,5" pitch. So they came back from short gearing on belt drive by longer gearing on drivers.
I would say you should rather choose the helix by the standard how you want to perform the out put of the power, not by that much how much power you got. Using steep angle helix will make the sled feel sluggish, especially on deep snow where the load from the track is enormous. Its not that engine would not have the capacity to run that helix, but it just makes the sled feel slow on throttle. I have seen tons of vids of 858 running +8000rpm, but still seeing its sluggish and slow (on throttle) in almost all of them. I was wondering why is that, and no wonder after learning this.
I would try straight 42 / 160-280 or 40 / 160-260 spring, Im sure that thing would come to life after that. But this is just a first guess and should do some testing to see how it runs on proper conditions, might need a bit heavier weights also after that or softer primary spring. Unfortunately not any of my friends is riding a cat anymore so lets see if can ride one this season.
I would say you should rather choose the helix by the standard how you want to perform the out put of the power, not by that much how much power you got. Using steep angle helix will make the sled feel sluggish, especially on deep snow where the load from the track is enormous. Its not that engine would not have the capacity to run that helix, but it just makes the sled feel slow on throttle. I have seen tons of vids of 858 running +8000rpm, but still seeing its sluggish and slow (on throttle) in almost all of them. I was wondering why is that, and no wonder after learning this.
I would try straight 42 / 160-280 or 40 / 160-260 spring, Im sure that thing would come to life after that. But this is just a first guess and should do some testing to see how it runs on proper conditions, might need a bit heavier weights also after that or softer primary spring. Unfortunately not any of my friends is riding a cat anymore so lets see if can ride one this season.
40 is way too low even on the 800 with a variety of springs. I tried a 43 on the ascender 800 and it was terrible at 11k ft. Would have instant backshift and rev, but overall did not pull hard and was consistently 5mph less track speed in deep pow. I ended up with a 46 straight and it was great IMO. I feel this 858 will pull a 48 fine from how mine has felt so far. Time will tell. Cat and Polaris pull helix angles totally different from each other.
Got a call from my dealer today. He took two sleds out last weekend, but unfortunately was only able to ride some roads. One sled had the new flash the other didn't. He said there was a noticeable difference between the two. Much better midrange and some improved low end. He said CAT definitely got some, if not most, of the power back that Ibexx was finding. Not able to know for sure w/o Dyno but was impressed with the new flash. They were riding about 10k elevation and he had the Cat 10k+ clutching in. He said he was taching 8150-8200 while still in break in. He's thinking there may need to be some clutching adjustments to cats recommendations, but says it difficult to know for sure until out of break in and in some good snow.
This isn't anything earth shattering, or something that we haven't seen, but this report moves it from 4th hand social media to a trusted source for me.
This isn't anything earth shattering, or something that we haven't seen, but this report moves it from 4th hand social media to a trusted source for me.
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Sounds to me that you would have needed heavier weights or softer primary spring.
