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Anyone know a good set up for the PC M8 for 0-3000 ft. elevation? Is a new torque arm/helix necessary or can you get away with just heavier weights (75g-80g) in the primary? Thanks for any suggestions
Low Elevation Clutching
- Thread starter eisen097
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- clutching elevation torque arm
A
42/40
Orange spring in sec
The strait 36 was having issues and could be used if ground down but 42/40 was the popular setup around here last year. (alaska 0-5k)
42/40 with orange spring almost pulled as hard as my team secondary!
Also look into white rads tcl if your blowing belts
-Aksnopro
Orange spring in sec
The strait 36 was having issues and could be used if ground down but 42/40 was the popular setup around here last year. (alaska 0-5k)
42/40 with orange spring almost pulled as hard as my team secondary!
Also look into white rads tcl if your blowing belts
-Aksnopro
E
So for your elevation (0-5k ft.) you were running the 42/40 and 70g primary weights? I have heard different stories from every dealer I talk to was hoping to hear from some riders.
G
Low elevation kit. my dealer put mine on for me. i added the Orange spring to the secondary over the summer. HOPING AKsnopro gave me some good advice on that. pretty sure the low elevation kit from cat came with 75g weights and the 42/40 helix. they installed it for free when i talked to them, at first they didnt want to and then after i said well hey you sell M sleds in Low elevation areas....... you should be compensating us for that and giving us the low elevation kit... apparently it was a good arguement cuz they took it and threw it on and gave me the other stuff that was on it also. goodluck
I
I agree the 42/40 worked well, better than the 36 straight
but we saw better belt life and lower temps in the secondary on a test sled using a 44/38, otherwise same setup
but we saw better belt life and lower temps in the secondary on a test sled using a 44/38, otherwise same setup
B
Are those 42/40 and 44/38 angled or progressive?
F
I ride between 1300 and 2000 ft. 71.5 gram weights and a cat purple primary. The purple has the same engagement as the yellow but is 240 lb on the finish instead of the 290 lb finish of the yellow. This will make the weight push harder. Leave the 36 degree in the back. The extra belt pinch is needed for boondocking. If you use the 42/40 helix the steeper angle will load the motor but will reduce belt pinch increading slip= heat. 2011 M8s. One with cat reccomendation 71.5 gram weights yellow spring( in sled from factory) and 40 helix(had to buy helix and weights). Second M8 71.5 gram weights change primary to purple from yellow, 36 helix in back( had to buy weights and a purple spring). The second M8 beats up on the first one in all conditions and runs cooler on the belt. Both recomendations will get similar results, lower engine speed. Why change the helix instead of the primary spring? Spring costs $30.00 and a helix costs $130.00. Marketing 101.
My example was comparing two 2011s. Did the same calibration with the purple spring on a couple of 2012s last year. Worked well.
My example was comparing two 2011s. Did the same calibration with the purple spring on a couple of 2012s last year. Worked well.
G
Do you have a 2012 that has this purple spring in primary, 71.5 gram weights in primary and 36deg helix? how does it work and are you still blowing belts if you did before?
S
My dealer said the same, then I used the exact same argument and got the exact same result! free low elevation clutch kit!
F
Belt issues on this particular sled were caused by a bad bushing in the secondary. Cat put a completely new one on. No problems since. In regards to the setup works well. Even sweeter with XF gearing.
I was down around 3000ft and the MDS weights the way I had them setup where insanely snappy with big track speed, I was surprised. 36* cam
G
No kidding.... man i wish someone else would have figured this out.. guess white rad made that kit for nothing :face-icon-small-dis
lol gotta have some humor with this subject since its been such a serious one.
Glad my arguement worked for you Spanky all you gotta do is know how to use your leverage... and dont forget the 12k you spent at that dealer... they dont forget it. or should i say SHOULDNT.
I ran my HC 153" back here in WI and ran:
80 gram cutler adjustable weights with a cutler gold spring. weights were empty.
36* stock helix with a orange cat spring in the secondary. I did have to grind some on the helix to get it not to hang up while shifting. when you take the spring out cycle your clutch fast and slow and you will feel where the hang ups are.
KJP
80 gram cutler adjustable weights with a cutler gold spring. weights were empty.
36* stock helix with a orange cat spring in the secondary. I did have to grind some on the helix to get it not to hang up while shifting. when you take the spring out cycle your clutch fast and slow and you will feel where the hang ups are.
KJP
Anybody else got anymore insight on this topic? I need to get some parts ordered soon!
I did try my stock springs also with the 80's and the 36* helix and the 80's were a little heavy. So I would maybe suggest if you want to stick with the stock springs start with the 78's.
KJP
KJP
