Max RPM for your ProClimb

[Phizzer]

After doing some research on forums and speaking with other individuals, I am interested in hearing what you guys have to say about where the ProClimb makes the best power at in the RPM band. To keep things even, I am talking about a 100% stock motor from a 15 or 16.

I had a reliable source at Arctic Cat tell me that these engines work better and make more power when they are slightly loaded at the top RPM and that when playing with clutch weights etc., I should be shooting for around 8150-8200 for top RPM.

Now several other riders on here are stating that they like to see around 8250-8350.

I am going to be purchasing a set of MDS adjustable weights, and before I install and test, want to get some input on what others suggest or want to comment on.

Does it simply boil down to rider preference??

 

[DDECKER]

Im running 8200-8300

 

[mountain_tamer]

8150-8200 is where we have my dads sled clutched and it pulls hard.

 

[clutch]

8100-8150 pulls hardest. It seems to buzz and not pull above that.

 

[05M7]

The dyno charts show anything over 8150 is major hp loss. It's better to turn 7800 than 8200. 8100 is peak hp for a bone stock motor.

 

[Phizzer]

Well that's good information then. It's funny how, depending which dealership you buy your sled from...they vary so much. I've demo'd a few new PC's out of the dealership and could get 8300 all day long.


Sounds like 8100 is the sweet spot. There has to be some HP curves around from a Dyno test somewhere. Maybe Eric at RacinStation?

 

[Insaneboltrounder/sjohns]

That's where the guys are getting the info from. Shoot for 8100

 

[summ8rmk]

I think that the dyno charts i have seen show a serious drop above 8000. That may have been on my 09 though?


GS6

 

[05M7]

I use to have them on my computer, I had a 09 m8,10 m8,and a 12m8. I'll look again. I know d&d has some on their website.

 

[Frostbite]

Here are a couple dyno charts from SLP. The 2012-2016 look like they make the most horsepower in stock form at 8,000 RPM.

https://www.startinglineproducts.com/img/dyno/2012ArcticCat800HpChart.gif

I can see where the confusion comes from the 2010-2011 800s' made their best horsepower at 8,200 RPM.

https://www.startinglineproducts.com/img/dyno/2010-M8-with-Single-Pipe.gif

The 2008-2009 800's made peak horsepower at 7,900 RPM when in stock form.

https://www.startinglineproducts.com/img/dyno/M-8-Single-Pipe.gif

 

[Shwinecat]

05M7 is going in the right direction. There is a dyno sheet on this motor when they were doing comparisons on silencers. I hope someone can find it. I know I studied it several times before purchasing my Diamond S Titanium. I am really surprised it has not been talked about more on here. The dyno shows what has been stated. Between 8,000 to 8,100 is the sweet spot.

You are way better being a little lower than high. It was really surprising how much horse power you lost and how rapidly if you go to high of rpm. I hope someone post which dyno company it was doing the testing.

 

[summ8rmk]

Dynotech
This is the chart i was thinking of.
7,900 is ideal, anything over 8,000 is bad

 

[Marble]

I run at 7900-8000, no more. Over 8100, the sled is slow. The sled pull MORE at 7600 than 8150-8200

 

[madmax]

The best place to look for dynos is Dyno Tech Research. Everybody has their own theory on where is best rpm to clutch at. Rpm changes so much with elevation, snow conditions, ect its hard clutch once and be done

 

[powdermuncher]

Most sleds will pull the shift RPM down 10 to 150 RPM in deep heavy snow VS trails . So dialled in at 8150 - 8200 rpm will have you shift at exact peak in heavy deep snow.
And trust me that makes a huge difference especially at altitude where power and shift RPM will drop anyway, go up a few thousand feet and loose an other 100 RPM and the sled clutched 150 - 200 rpm high all of a sudden performs perfect

 

[Frostbite]

I'm with you powdermuncher. I shoot a little higher shift speed on the trails into the riding areas because once I start climbing in the deep stuff and gain elevation, I know the shift speed will drop me right into the meat of the powerband. Of course, the more elevation, the steeper the hills and the deeper the snow, the more the rpm will drop.

 

[minet]

also if a pipe is added it may shift your powerband is why some of the higher values have been posted probably

 

[summ8rmk]

When someone says clutch it for the higher rpm, and then deep snow will drag it down that doesn't make sense to me.
I don't care what my max rpm is on the trail or lower elevation than what i ride because i don't hold the throttle open for any measurable duration except on steep hills and usually deep snow, so those are the conditions i clutch for, other situations ie: Lower elevation and trails i can always let off the throttle to control rpm. So i am clutching for my primary elevation, hills, and deeper snow.


GS6

 

[leadfoot33]

my butt dyno says 82 runs better than 8
ive been running mine in the 8200-8400 area however anything above 8350 seems to fall off and you can feel it. i compare my sled that runs at 82 and my dad sled that runs at 8 and mine feels better and is peppier
overall i would aim for above 8 but below 8350

 

[Shwinecat]

Dynotech
This is the chart i was thinking of.
7,900 is ideal, anything over 8,000 is bad

Thanks summ8rmk that is the dyno chart I was looking for.