Anybody seen these?

[RmkMtnRider]

http://www.hardrockmotorsports.com/HR1_web/HR1_web_snow_Polaris_Dragon.html. Looks kind of interesting but is it possible to be able to get a better top/mid/low range from a can? Kinda spendy.

 

[slash]

the designe of a two stroke needs back presure to run right moding means it neads a bigger opening so in thery it would work but its a trial n error system remember too little back presure and the cyl goes lean and you burn down..

 

[RmkMtnRider]

but if you run a pcv to make it more or less lean wouldn't keep from burning down? But if you want to adjust that can on the fly then you'll also have to be changing the mapping correct? Sounds like more tuning than its worth for a couple extra horse if its even that much gain. It sounds pretty interesting tho. Hopefully someone on here has some feedback on it.

 

[AndrettiDog]

Seems risky for a couple HP. Seems like it could fall on it's face too.

 

[Scott]

Scavenging and backpressure comes from the expansion chamber and the stinger diameter (the pipe between the chamber and the muffler.

Unless the muffler flows less volume than the stinger it wont likely make it lean

 

[roni87]

pressure

Last winter I had a snostuff can on my 755 and the packing broke loose inside. It would shift over and cover half the hole and this would cause the motor to cut out, so I cut the can in half by one of the welds pulled all the packing out and rewelded for a fix to get me thru the winter. Put another 400 or so miles on and no issues. Alot of these cans are just a straight-thru design with some fiberglass around the outside to sap the sound a bit. Not like there is much backpressure to start with.

 

[AndrettiDog]

Last winter I had a snostuff can on my 755 and the packing broke loose inside. It would shift over and cover half the hole and this would cause the motor to cut out, so I cut the can in half by one of the welds pulled all the packing out and rewelded for a fix to get me thru the winter. Put another 400 or so miles on and no issues. Alot of these cans are just a straight-thru design with some fiberglass around the outside to sap the sound a bit. Not like there is much backpressure to start with.

But this company is changing that simple design.

 

[milehighassassin]

I doubt there is much to gain here. Seems risky.

$435 is also spendy, you can do a lot more for the buck.

 

[fonetikal]

Immediately I thought it would be sweet to build a little cable adjuster (like a friction thumb shifter from an old mountain bike) so you could adjust from the handlebars, truly "on-the-fly". Too bad about the price tag, and the risk you guys are talking about.

also, what a useless video!

 

[AndrettiDog]

Ha! I thought the same on the video. It doesn't even show their "adjustability". I think adjusting on the fly is not necessarily good. You would probably be bogging down more than gaining anything.