2010 Stock M8 Clutching over 9k

[jonny ringo]

Are you guys finding the suggested 63 grams for a completely stock 2010 M8 working to pull right at 8200-8300 at 9000'+ ?

Let me know what is working, thanks in advance!

 

[CuzzinOlaf]

I was wondering the same thing.

 

[pushcat]

X3:d

 

[iluv2fly]

It is interesting that on dynotechs website the 2010 800cc cat engine made peak torque and HP at 7900 rpm. Why are people revving these things to 8200rpm.

 

[pushcat]

The little sticker under the hood says peak operating RPM 8100-8300.

 

[STORMY]

I would think anything around 8000 should be good as the tachs aren't perfect (should be within 300 rpm) I know I'm not gonna let a few hundred rpm wreck my day but no, I haven't used my 63's yet either

 

[colorado_matt]

63's aren't nearly enough on mine. I'm pulling and holding 8200 @ 12,000 ft. with 64.49 grams(Cutler adjustable 60-70). I will continue adding weight until my rpm's drop to 8000 and see how the motor feels and go from there. First sled I've had that actually needed more weight than suggested iluv2fly, are other companies dyno results similar? I'm always curious about dyno numbers since there are so many variables to make more power on the sheet. I think they provide a good starting point, but the mountain is where I want my sled to run it's best.

 

[elvis1280]

the factory is way off w/ the suggestion of 63g's. they are way to light. i left my 68's in and i live in steamboat springs colorado, i got 350 miles on the sled and ride from 8000 to 11,000 ft. max rpm has been at 8480 at about 8000ft and a steady 8180 to 8330 at 10000ft. if i can add more tip weight i would be so happy.

 

[shredjim]

63's aren't nearly enough on mine. I'm pulling and holding 8200 @ 12,000 ft. with 64.49 grams(Cutler adjustable 60-70). I will continue adding weight until my rpm's drop to 8000 and see how the motor feels and go from there. First sled I've had that actually needed more weight than suggested iluv2fly, are other companies dyno results similar? I'm always curious about dyno numbers since there are so many variables to make more power on the sheet. I think they provide a good starting point, but the mountain is where I want my sled to run it's best.

How are you liking your cutler adjustable set-up? Did Cutler give any correlation as to Cat weights, so you can pick which weight set to buy? I heard that the adjustable weights don't end up with the weight in the best part of the cam arm, and I was advised to stick with cat weights, but I don't like working on the primary bolts and set screws with heat etc. Too much risk of something going wrong and breaking something. Or - ruin your crank bearings beating the primary off the sled. Cat clutching is not so user friendly to wrench on in my opinion. I hate burning out locktight with the torch and beating on my sled with a sledge hammer to get the primary to pop off. I really like the adjustable idea. No more primary cave man work!

 

[jonny ringo]

With what your telling me from dynotech, and the results I found from the D&D website, I definitely agree, right around 8000 rpms is where they are finding the max hp. I think I'll tune for that and then play around with it from there, seat testing will be final test.
I have Dalton Adjustables that work great, 67.5 gram base just might be a great starting point. I had my supertips set up to 64 grams but hopefully won't need them.

 

[colorado_matt]

elvis- you running 68's around Steamboat sounds on par with mine. On prior sleds, I've always been able to add about 2 grams when I ride there, which would put me at 67.45. I haven't been up that way yet this season, but hopefully soon.

shred- I have used Cutler's adjustable weights on my last 4 sleds and will continue to do so. On this 2010 I have a range of 60-70 grams and everything in between. If you ride below 9,000 feet, I'd recommend the 65-75 gram set. You can load the weight anywhere you want from the heel to the tip. In the past with the Cutler's, I've had to run a gram or 2 lower than Cat's suggested weight. But on this one I'm using about 2 grams more. The Cutler's are very easy to use and comes with a sheet that tells you what each individual set screw weighs. Only takes a couple minutes to change your setup. Just be sure to keep each cam arm the same as the others.