Clutching for CPI twins for 2010 800 Dragon 163

[turbo RMK]

I just purchased some cpi twins for my 2010 800 dragon and i'm not sure of what kind of clutching to run.. CPI claims 20 hp with these pipes so i will be at about 170 hp + - a couple hp. I have Just about every intake vent and hood vent on my sled so it breathes easy and under hoods temps low. i changed my gearing to 19-42 also. So i was just looking at slp's web site at there performance packages for the dragon with a single for about 167 hp and was going to run the same clutching set up as that. What's everyones thoughts on this.

 

[AKSNOWRIDER]

that should get you close, but you might want to start with slp's twin clutching setup..normally with twins you pull a little less helix since twins will give up a little midrange vrs a single....there is a good dragon clutching thread on here that should give you some ideas to get you started...

 

[POZZY]

start with stock and work your way up.. I have the slp twins and it works best with polaris 10-64 w 19-42 gearing 58/40-36 helex, i tryed bb's and carls 60/42-36 and dident have much luck. i ride 6000-8500 feet.

 

[turbo RMK]

the clutching is the same through slp on the performance package with the single @ 167 hp 58-40 36 helix same weights and springs at 6-8000 feet as the slp twins at same elevation.. so thats a good starting point anyways but does it really have a difference going from (stock) 56-42.36 to 58-40.36 slp set up and will it make a difference that i'll be 5-8 more than slp set up. the reason i ask so many questions is because i don't want to have to buy a bunch of set ups if there is some one out there that is close to my hp range and has a good set up for deep snow. PLEASE HELP!

 

[CHARIOT OF DOOM]

gearing

I just purchased some cpi twins for my 2010 800 dragon and i'm not sure of what kind of clutching to run.. CPI claims 20 hp with these pipes so i will be at about 170 hp + - a couple hp. I have Just about every intake vent and hood vent on my sled so it breathes easy and under hoods temps low. i changed my gearing to 19-42 also. So i was just looking at slp's web site at there performance packages for the dragon with a single for about 167 hp and was going to run the same clutching set up as that. What's everyones thoughts on this.

why gear down a 163?? what is stock gearing??

 

[POZZY]

You probably won’t go wrong by going up a couple grams to start. I also tried the stock helix and I didn’t notes a huge difference between the slp. So I wouldn’t go spending money till you ride it and see how it reacts. Different pipes have different torque ranges it’s sometimes not all about the hp the pipes clam. I haven’t herd much about the CPI pipes but I learned from past experiences not to over clutch a twin piped sled back shifting is key, they need to be revving.

 

[POZZY]

Down 1 tooth on the top & up 1 on the bottom form stock is 19-42, clutches shift out more =cooler & efficient, more pull and go in the steep & deep..

 

[thefullmonte]

I agree that the twins will probably like RPM. Just guessing, but I would probably go with the 58/40-.36 and a 160/280 spring. You can get that helix with a second ramp of 58/38-.36 to give you more tuning options.
For the primary why not go with and adjustable weight? Do the thundershift or MTX weights for better belt squeeze and backshift plus you can fine tune them to your liking.

 

[POZZY]

Personally, I tried them all; I don’t think there worth the money, the OME weights always worked the best for me. Just my 2-cents but everybody has different opinions. That dual ramp helix would be the right way to go. I think the stock primary spring is a 130-330 which is already tight but change it out with a 140-340-SLP blue pink or a TEAM Lime Green, its good to do every year anyway.

 

[turbo RMK]

Stock 08 dragons are 20-41 gearing and 09 and up are 19-41 i just got the lightweight 42 tooth big diference in weight.. so i'll be ok to run the 58-40.36 dual helix with stock or 160/280 spring and for sure the 140-340 pri- spring and then it should be fine tuning with weights.

 

[POZZY]

that would be your best bet.. Good luck with the new pipes..

 

[CHARIOT OF DOOM]

Stock 08 dragons are 20-41 gearing and 09 and up are 19-41 i just got the lightweight 42 tooth big diference in weight.. so i'll be ok to run the 58-40.36 dual helix with stock or 160/280 spring and for sure the 140-340 pri- spring and then it should be fine tuning with weights.

i ordered a set of those pipes last week, new to polaris use to have a Xpensive Pile (ski-doo) sled is stock exept for vents and avid drivers so even a 163 you gear down? how do you think 09 dragon will do with stock clutching with cpi pipes??

 

[POZZY]

All you could do is try it, watch your midrange my SLP'S were very lean below 5500 on the trail you could actually hear the motor pinging & rattling with pre ignition under heavy load, work the throttle run it rich in the midrange till you get the feel for them, it will probable be a bit zingy with the 62’s. The CPI’S might react different then my slp’s, like I say, I haven’t herd much about them.

P.S You can’t go wrong with gearing down, it was the best thing I ever did to my sled.

 

[steepndeep800]

I see a lot of people saying to use the 19/42 gearing is that the general consensus? How about your head choice for elevation on the twin piped motors? SLP says the new stock 11.5 to 1 head is to low of compression at elevation. They make 3 different choices in comp 12.6, 13.2, 13.9 . Does anyone have plans to do some of these. SLP has told me they are unsure of what to recomend yet. They did dyno testing with there twins, reeds, and there 13.2 to 1 head and got 174.6 hp at 6000ft or so where there dyno is.

 

[POZZY]

I’m running mine stock until SLP gets the new updates figured out; I will also be getting the pc111 to pour the fuel to her on the trail down low, to be on the safe side. We unload usually at about 1500, there not recommended under 6000ft, that’s the only thing that scares me about throwing compression at it, It’s not good when you here pinging on the way up even with 25% C-12.

 

[turbo RMK]

well I ordered all i need from slp yesterday should see it in about a week and once i get everyting installed i will post how it goes also for those who are going with the 42 tooth. go with the lightweight one from polaris it's not to expensive but big difference in weight and it's rotational.. just my opinion!

 

[DragonSlayer1]

Do cpi pipes require race fuel

Do cpi pipes require race ruel? I know slps do.

thanks

 

[CHARIOT OF DOOM]

Do cpi pipes require race ruel? I know slps do.

thanks

i was told no one slp and cpi. ordered twins from cpi today

 

[turbo RMK]

I just got my cpi twin set up on my dragon and you can really feel the difference all though the power curve..for the first tank i mixed it 20% C12 and 91 octane just to be safe i'm about 2200 feet.. also took me a little while to get dialed in with the control box do not follow the numbers in the instructions cause it's to rich and i hooked up my power and ground wires to my aux wires instead of messing with power injecter wires. you shouldnt't have a problem running 91 octane in the mountains.

 

[CHARIOT OF DOOM]

I just got my cpi twin set up on my dragon and you can really feel the difference all though the power curve..for the first tank i mixed it 20% C12 and 91 octane just to be safe i'm about 2200 feet.. also took me a little while to get dialed in with the control box do not follow the numbers in the instructions cause it's to rich and i hooked up my power and ground wires to my aux wires instead of messing with power injecter wires. you shouldnt't have a problem running 91 octane in the mountains.

i believe the numbers he gives is for 6000 and higher