Why isn't someone making a series of aftermarket pros?!
- Thread starter anziconda
- Start date
Speedworx and Hotseat are the same company. Speedworx being the green side of the Shop and Hotseat is the blue side.
I thought there were three outfits trying to make aftermarket polaris mountain sleds..
Cat,Skidoo,Yamaha.....hahaha
Cat,Skidoo,Yamaha.....hahaha
S
snowmobiler
Well-known member
wheres my waders.its getting deep in here.
Crumpled up next to Gramma's bed.
M
MotoPsycho
Well-known member
An affordable fix for belt drives will be available for pre-order next week...
Belts are less than OEM, different gearing options available.
Belts are less than OEM, different gearing options available.
Last edited by a moderator:
Is it any stronger? Will it withstand heat any better?? What all makes up the kit belt, pulleys, tensioner?
Last edited by a moderator:
M
MotoPsycho
Well-known member
This kit addresses many of the issues surrounding the OEM setup.
First is the lack of a tensioner - one of the main causes of OEM belt failure. The OEM belt has to be installed extremely tight, this makes up for stretch during break-in and use. Putting the belt under these stresses causes poor break-in, undue stretch, drive train component fatigue, etc. (i.e. drive shaft issues)
Another issue is the tooth pitch on the belts. More teeth per inch = better belt "traction" - we covered that too.
Next is belt price and replacement. Our belt is less than 1/2 price of the OEM, and you can change it out in the middle of nowhere - WITHOUT "specialty" tools... in a fraction of the time.
To address you next question; Heat is heat. A kevlar reinforced belt is a kevlar reinforced belt. As in any sled, if the underhood heat is too great, add vents - nature provides a great air conditioner in the season we love - and it benefits much more than just belt life.
That being said, some of the heat related belt failures are also due to the extreme tension on an OEM system - a tensioner system such as ours helps to rectify that.
The kit includes everything needed to replace ALL OEM belt drive components including gears, tensioner, belt and hardware. Different gearing options other than stock are an option that cost less than $100.
Not sure that Polaris is using a Gates belt though... which could also be a reason for change in durability when running their top quality PolyChain
The type of loads and loading conditions, high-torque and lots of on/off high-load, would be common between a sled drive and a blower drive.
Thoughts??
From another thread on the quickdrive.
The type of loads and loading conditions, high-torque and lots of on/off high-load, would be common between a sled drive and a blower drive.
Thoughts??
From another thread on the quickdrive.
AK IQ...
Your comment on roots blower belts had me looking a bit.. and found this interesting info on 11mm pitch belts
WOW... 800 hp just to drive the blower on a Top fuel car!
From here CLICK
NHRA supercharger drives are notoriously hard for belts to survive on. The application is extremely demanding, and requires a unique belt to perform as needed. The two top classes that use superchargers are Top Fuel and Funny Car. In a typical 1000 foot race, a Top Fuel car will have elapsed times in the 3.8 to 3.9 second range.
HP requirements to drive the supercharger are typically quoted in the 800 HP to 1000 HP range. This is with the driving crankshaft being around 8000 - 9000 RPM.
If it was just a question of handling 800 to 1000 HP, the drive (while large), wouldn't be that difficult to design to work properly. However, the system has a lot of unique load situations that really stress the belt. The torque fluctuations from the engine resemble barely controlled explosions. The speeds are high. The heavy loads make it likely that shafts will flex and belts will track to the outside flange edge. During tire spin conditions, drivers have to "pedal" the car. This is a method of getting off and back on the throttle very rapidly in an attempt to get the tires hooked up and stop the tire spin. When this happens, the driving RPM drops nearly instantly from 8000+ RPM to a couple of thousand RPM. The inertia of the supercharger takes over at that point and it tries to become the driving shaft. This creates havoc in the belt, as the tight and slack side spans in the system are reversed, creating high shock and compressive loads in the tensile cord. Add in the virtually instantaneous load application when the cars leave the starting line, and you have a very difficult, very damaging application.
An 11mm pitch Poly Chain GT belt was specifically designed for this application. The 11mm pitch gives more speed ratio flexibility than the previous 14mm pitch belts, and 11mm belts have more strength and ratchet resistance than 8mm pitch belts. A specially designed tensile cord is also used to handle the loading situations described above.
Last edited:
I have seen this kit in person and it is nice. Complete bolt on with no modifications to factory parts. Comes with upper and lower pulleys, belt, tensioner, and bracket. You can see by how far the belt wraps around the top pulley (over halfway) compared to a stock polaris belt setup that it will handle more load. The stock polaris belt pitch and how few teeth engage the drive pulley are one of the main reasons they fail. A stronger stock belt will help, but it will never be able to handle the load this will.
M
MotoPsycho
Well-known member
Polaris is NOT using Gates.
I caution folks on comparing a top fuel blower belt to the belts we use... it's not exactly "apples to apples". The Gates belts we use are extremely tough, but not near what is on a top fueler.
We have not proven it in any way, shape or form, but I believe the Gates belts are as strong as an OEM chain. That being said, they can break just like a chain...
The beauty is that if one does break, it doesn't destroy chain cases, etc. You can also fix it in the back country, and keep riding.
