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Finally broke the 40 MPH track speed wall!

In mountain riding track speed is always way higher then your actual land speed. When the snow is deep and your climbing hills you want to see whats the highest track speed the sled will maintain. So when I'm climbing I'm probably only doing 15-20 mph land speed but my track is spinning at 41 mph. I have no way of measuring my actual land speed, a GPS would work, so I'm just guessing. So for the mountain riding group track speed is king, as the more snow you can move the better you will be able to climb in the deep snow.
 
need to take into account both changes, track pitch and final drive ratio.

2.23/2.86=0.78

2.38/3.0=0.793

.793/.78=1.7%

40mph*1.017= 40.7mph

YMPHMV


Pitch doesn't mater, it's driveshaft sprocket diameter and overall gear ratio.
 
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Pitch doesn't mater, it's driveshaft diameter and overall gear ratio.

This

21/20.08 = 4.5% higher

The gearing is 6.7 lower so the net is approx 2.2% - or roughly 1mph at 41 mph.

So you should still be slightly above your 40mph goal.
 
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This

21/20.08 = 4.5% higher

The hearing is 6.7 lower so the net is approx 2.2% - or roughly 1mph at 41 mph.

So you should still be slightly above your 40mph goal.

Thats exactly what I came up with. I Cant figure out these other numbers being posted. Eric
 
Thats exactly what I came up with. I Cant figure out these other numbers being posted. Eric

I came up with 6.73% lower gear ratio so I figured 6.73% of 41 mph which equaled 2.7, I guess I had the percentage right but not the correct net!
 
Does the jaws pipe really peak at 8500? seems high


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Isn't your track speed read off the drive axle? If so gearing change will not make the speedo be incorrect. However the driver size will make the speedo read incorrectly but in this case where you went to a bigger diameter driver you speedo would actually read lower then the speed actually is. Without calculating it my guess is your track speed is closer to 43 then 42
 
Heal Tech / Speedo Healer

Isn't your track speed read off the drive axle? If so gearing change will not make the speedo be incorrect. However the driver size will make the speedo read incorrectly but in this case where you went to a bigger diameter driver you speedo would actually read lower then the speed actually is. Without calculating it my guess is your track speed is closer to 43 then 42

Pretty sure all AXYS sleds have the speed pickup reading the brake disk on the Jack shaft, regardless of whether chain case or QD equipped. Thus gear change and / or driver change will have an effect. I've found the HealTech SpeedoHealer to be a cheap, easy, way to correct the speedo ratio without having to try and talk the dealer into resetting the formula (most aren't smart enough to do the math).

Here is a thread with my research into it. It was for the PRO Ride but that portion of the electronics remains the same on the AXYS.

https://www.snowest.com/forum/showthread.php?t=377709
 
So, after more clutching and gearing changes i have found another 4 mph track speed. Im now running Kurts Polaris' gear down kit. Im geared 2.58 now. I running a very shallow helix and different springs and weights. I now run 64 gram EPI belly buster weights with a black/silver (120/300) primary spring. I don't know what the actual angles are on this helix i bought as the shop wouldn't tell me. All i know is its a mutli angle and very shallow. Im guessing 54-36.36. Im running a red/green (120/220) secondary spring and 2 derlin washers. The key to this set up is the Carlisle 809 belt. The 183 polaris belt is way to hard and takes super stiff spring to hold it. This is the best performance that i have been able to get out of this 174 axys. Hold 8400 rpm @ 45 MPH track speeds.
 
So, after trying countless springs, weights and helix's i finally got my Axys to 41 MPH track speed.

He's what i have done to achieve this.

2016 Axys with a Camso 174, 2.8. with Avid 3" pitch drivers. The track is not as tight as Polaris specs but still got good tenstion on it. 48 hr's on the motor and 780 miles. Compression is right at 122 psi per cylinder.

I put the Pro RMK gears on for a cheap gear down.
Jaws pipe and MBRP Trail can.
Stright 40 helix with Black/Purple spring (160-240) with 2 derlin washers.
10-64 weights with a Pro Rmk spring. (140-330) and 2 thrust washers.
Shellbourne fuel additive with Shell 91 with no ethonal and in no ethonal mode.

8500-8550 RPM with 41mph track speed

I ride at 6000-6500 feet.

The sled just rips. I had a few guys ask what turbo i was running. opened the side panel and they were shocked. If your running a smaller track you will need to use 10-66 weights.

The Shellbourne additive made a huge difference and was necessary to get over the 40 mph wall. Sled runs almost 10-11 degrees cooler and helps a lot with the Jaws pipe. The sled normally runs at 128-129 degrees, now it runs at 117-119. I cant wait to try there oil as it is supposed to work with the fuel additive. But i have a bunch of GOLD VES that i need to use up first.

Im not sure if the cooler running temps is allowing the ECU to add timing, but the motor makes a sound 8500 that is hard to describe. It just sounds so on the pipe... if that makes any sense.

I have the jaws om a 155 2.6, all stock clutching other than slp 71g, 6000 feet and im up as high as 46 mph on a longer pow pull, i see 42 on short burst of 5 seconds or so
 
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