Wanted, '13 Pro rolling chassis.

[Matte Murder]

As shown above Brad has stated he gets $4500 for every "brand new Polaris 800 engine". He said most are sold outside the sled industry for other uses. If you built a super high compression engine for use at high altitude could you get a stand alone ECU to keep it alive at lower elevations? That is the only way I could see an ECU "regain" a LOT of HP lost at elevation. Not apples to apples though.
Wyo you have probably eye balled the install in a Pro already. Is the engine space for the Pro about the same as a Cat? Will you have to go for a custom made pipe to mount the turbo too? If so how much would that add to the cost or will you build that in house? What is the target for engine horsepower?

 

[mountainhorse]

The practical challenges with this project are the laydown design of the cat motor... the width of it and still keep it in the bulkhead low where the rot GG is supposed to be... and the interference with the induction and steering system...The exhaust is a no brainer that 10 Benjamins can fix...... but you will prob not be able to go over the motor with it like in the cat... Lots going on in front of the motor.

This would be a great project to work with

 

[AndrettiDog]

Come on poo guys, are you really gonna make the two cat guys look like the mean kids because we're telling how reality works?

Huh? How did this become a Pro guy vs Cat guy? I think one guy is arguing with you on this.

I'm waiting for him to make a kit... so that I can finally buy a pro for my own sled.

You are buying a Pro. Yeah we all bought them for our wives and now we all ride our wives sled. You'll be there too in a few months!

 

[WyoBoy1000]

The practical challenges with this project are the laydown design of the cat motor... the width of it and still keep it in the bulkhead low where the rot GG is supposed to be... and the interference with the induction and steering system...The exhaust is a no brainer that 10 Benjamins can fix...... but you will prob not be able to go over the motor with it like in the cat... Lots going on in front of the motor.

This would be a great project to work with

Only thing I really want to keep is the geometry of the suspension, close to same balance points, it the rest needs changed, thats what will happen. And keep the weight close even though the engine and desired coolant capacity may add a few lbs it will be worth it. The first will be the hardest then it will be easy to refine and pretty it up.

Cant be as hard as a apex in a rev chassis and I've seen a few of them.

 

[Matte Murder]

So you are going to turbo a big bore? What power will that make? Are you going to lighten it up too or just focus on the power upgrades? How much weight does the cat engine plus turbo add over the stock Poo engine?

 

[pura vida]

The claimed on this thing is 220 hp. That's at sea level, bring it up here and it's down to less than 140 hp at the top of my riding area.

using the generally agreed upon value of 3% loss every 1000 feet, at 10,000 feet a 220 hp sled would be down to 162 hp. that is still more than a stock pro at sea level. hell, it is still more than any stock sled on the market today. but wow, what a price to pay for "stock" power. to be down to 140 hp you would have to be just under 15,000 feet. how high do you ride? i would also be all about the turbo if i always rode above 6000+ feet. good luck on the project. sounds pretty BA. my only suggestion, would be to use a p85 rather than the stock cat clutch. even though the p85's reliability and quality have drop some the last few years, imo, i've still seen more failures with the cat clutch. but all things considered, probably a pretty minor issue/concern.

pv

 

[WyoBoy1000]

The goal is just to put the motor in, then add as needed. Just getting the motor in will develop a kit hopefully. Then build other kits (T kit, etc...) to add. My PC is far above the pro's in the power department with just a can and with my skinny mods it will run with a pro on handling. But the pro chassis handles easier and should drop weight with added backcountry advantages as well. So the idea is to have a modd-able, reliable, all out backcountry sled on a production basis. Yes the Pro clutching will be used, cat really put there head up there arse last year giving us china quality clutch's.

The elevation ????? Normal barometric pressure at 0ft is around 15.5lbs, at 10,000ft its around 10lbs. That means at 10k you are loosing about 34% of power. So 160hp drops to 105hp, 220hp at 5k and go up to 10k and you loose 17% and your down to 182hp, which I think is pretty close to a old non HO m8 on 6-8lbs, the HO and the new T kits are far better and on 8lbs flat run away from a older m8. But the turbo builds more torque and will not loose it. As an engineer I think one could figure that pretty easy.
But then there is the real world, and I've seen it and done it. NA does not have the torque and pull of a turbo. I would put money on the fact that a turbo m8 motor (setup right) at 6-8lbs will stomp the NA of any make. Thats just my opinion and you can fight amongst yourselves.
Truth is I can beat a pro on my PC, but I want it to be easier.

 

[backcountryislife]

using the generally agreed upon value of 3% loss every 1000 feet, at 10,000 feet a 220 hp sled would be down to 162 hp. that is still more than a stock pro at sea level. hell, it is still more than any stock sled on the market today. but wow, what a price to pay for "stock" power. to be down to 140 hp you would have to be just under 15,000 feet. how high do you ride? i would also be all about the turbo if i always rode above 6000+ feet. good luck on the project. sounds pretty BA. my only suggestion, would be to use a p85 rather than the stock cat clutch. even though the p85's reliability and quality have drop some the last few years, imo, i've still seen more failures with the cat clutch. but all things considered, probably a pretty minor issue/concern.

pv

I ride at 10,500 to 13k mostly. I did the math (using the 3% figure which of course is an estimate), wasn't just guessing. The cat & doo motors both make more than 160 hp btw. We've got REAL 800's (the pro motor on boost would do fine for me power wise, it's the durability that's the problem)

I'd think when wyo sells off the motor, he'd keep that p85 & have fastrax mod it... that's what I'd do anyhow, it's a great primary.


Btw, both WYO & I came from 1000 motors at high altitude... there's a reason we both ride turbos now.

 

[WyoBoy1000]

I ride at 10,500 to 13k mostly. I did the math (using the 3% figure which of course is an estimate), wasn't just guessing. The cat & doo motors both make more than 160 hp btw. We've got REAL 800's (the pro motor on boost would do fine for me power wise, it's the durability that's the problem)

I'd think when wyo sells off the motor, he'd keep that p85 & have fastrax mod it... that's what I'd do anyhow, it's a great primary.


Btw, both WYO & I came from 1000 motors at high altitude... there's a reason we both ride turbos now.

Modded 1000's, big NA hp and I think we where both under 450lbs crate weight or lighter.

 

[snowmobiler]

etec powered pro might be fun to ride.

 

[WyoBoy1000]

etec powered pro might be fun to ride.

yes it would, but not so sure on the reliable part and there is way more going on with the etec. The cat is simple and makes the most power for each given mod.

How much would a 600cc engine be worth.

 

[WyoBoy1000]

Whats the diff from a pro to a rmk, m might just go with a rmk 600 to keep cost down, unless they don't come with something I want.

 

[jwentzer]

Whats the diff from a pro to a rmk, m might just go with a rmk 600 to keep cost down, unless they don't come with something I want.

http://www.snowestonline.com/forum/showthread.php?t=245493

Hope this is what you were looking for.

 

[WyoBoy1000]

What about the '13, not sure the thread covers that if any thing is diff.

 

[tdorval]

I'm pretty sure the standard rmk's don't get the belt drive and associated parts along with the carbon fiber over structure but I could be wrong. Not sure on the seat and running boards though.

 

[B&M Fabrications]

The Standard 600 RMK is the Switchback chassis in a 144, not the Pro. If you get a 600 you would want the Pro since it is narrower by a couple inches and is a 155.

Bryan

 

[B&M Fabrications]

The Standard 600 RMK is the Switchback chassis in a 144, not the Pro. If you get a 600 you would want the Pro since it is narrower by a couple inches and is a 155.

Bryan

I lied you can get a standard RMK in a 600 with a 155. It will just have the cheaper shocks and a front cooler in the tunnel. They don't come with the minimalist controls on the bars like the pro either.

 

[jakey-boy]

Rmk doesn't get belt drive or cf over structure for 2013. A arms seat & boards are changed otherwise it the same 2012 differences.

 

[WyoBoy1000]

Definitely want the drive system, don't care about shocks but would rather and will have to install a bigger cooler, a lot bigger.


So what can I get out of a 600 engine, wiring, fuel system, pipe etc....

 

[m1kflyingtiger]

There's not going to be as big of a market for the 600 if your planning on selling the motor. It would make a great candidate for a 660 mod sled, but their pretty much bullet-proof. A lot more people mod the 8's so there's a bigger chance of finding someone who's blown one up out of warranty.