2013 Belt Drive
- Thread starter skidworth
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theultrarider
Well-known member
Im betting well over 99 percent of people will never change a belt on their final drives. And no, no tensioners will be needed.
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Jeez ultra... at 50 years old I would think you'd go easy on the pensioner jokes.
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theultrarider
Well-known member
Jeez ultra... at 50 years old I would think you'd go easy on the pensioner jokes.
I hate the damn spellcheck on my SMARTphone....
.....anyone who was around back in the day when we had bad *** mod sleds with belt drives WILL SIT THIS ROUND OUT.......
Let's think in these real world terms....FROZEN SOLID COLD...hot hot hot HOT...extreme mechanical force.....wet possibly super humid hot....COLD COLD COLD...rest and dry or rest and freeze depending on vehicle placement..repeat over and over
One famous quote coming from my Carlisle Company sponsor and engineer rep when I was working for them in high performance belt testing for drag race applications. "You guys are using a rubber band for transmission on 200 HP and 500lbs of mass! What do you think is going to happen?"
So yes color me skeptical but HOPEFUL for success!
Let's think in these real world terms....FROZEN SOLID COLD...hot hot hot HOT...extreme mechanical force.....wet possibly super humid hot....COLD COLD COLD...rest and dry or rest and freeze depending on vehicle placement..repeat over and over
One famous quote coming from my Carlisle Company sponsor and engineer rep when I was working for them in high performance belt testing for drag race applications. "You guys are using a rubber band for transmission on 200 HP and 500lbs of mass! What do you think is going to happen?"
So yes color me skeptical but HOPEFUL for success!
Belt technology has changed a lot over those years. The belt is more Kevlar than it is rubber.
There are auto transmissions now that are belt driven, much more mass.
Sent from my iPhone using Tapatalk
There are auto transmissions now that are belt driven, much more mass.
Sent from my iPhone using Tapatalk
These belts run a carbon fiber cord and no rubber whatsoever. So really nothing in common with some of the previous posts. They DO NOT stretch.
My GM 6.5 Diesel was a pooch, so the Duramax LXX must be, also. They're both GM diesel trucks.
Most of us know how dumb that comment is. I can't just prognosticate new tech based solely on past experiences. There are usually some real differences. Even if this is the same company that produced the 05 RMK. They also came out with the pro. Give it time, gents.
Most of us know how dumb that comment is. I can't just prognosticate new tech based solely on past experiences. There are usually some real differences. Even if this is the same company that produced the 05 RMK. They also came out with the pro. Give it time, gents.
How many of us have cars with a belt nearly identical to this one running the cams,and in some cases in a 0 clearance motor. These belts last 8-10 years and 80,000 plus miles without issue, why would this be any different?
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badass1000
Well-known member
How many hp does it take to turn those cams? How many hp are you putting to the track?
It's not how much power exists, it's how much power does it take to spin the track....once the track breaks loose the load on the belt decreases....even in the worst scenario the load is probably much less than one would think.
It will be fine....I do think the aftermarket will have a tensioner so a guy could run more ratio's using the same belt and not having to change both gears.
It will be fine....I do think the aftermarket will have a tensioner so a guy could run more ratio's using the same belt and not having to change both gears.
won't you loose a little efficiency w/ a tensioner though?
I personally think a tensioner is a waste of the aftermarket's time. Sure some will be sucked into it by unscrupulous vendors but when you do the math. In the normal range for mountain riding ratios the jump is about 5 MPH increments with a 9T 3"P driver everything else will be smaller increments. As the ratio gets closer to flatlander ratios is goes up to 10 MPH increments still not bad in my opinion.
Where the aftermarket should be focusing is a drop and roll to get us room for the 9T 3"P driver. My $0.02
All I'm getting at is like we've all done with a chaincase....experiment with a variety of ratio's in conjunction with clutching. With a case you had quite a range of ratio's with the same chain. If a guy wants to experiment with a BD he will have to buy a few belts as well as gears. Once you settle on a setup you may not need a tensioner (as polaris has done) but for making changes on the hill it would be cheaper and quicker. That's all-
I wouldn't consider something like that "unscrupulous"... Just another tuning tool.
Are CMX and C3 unscrupulous for having a tensioner???
I wouldn't consider something like that "unscrupulous"... Just another tuning tool.
Are CMX and C3 unscrupulous for having a tensioner???
I want this belt drive
http://evil-engineering.com/assets/2010/2/24/std_lsd_thumb.jpg
http://evil-engineering.com/assets/2010/2/24/std_lsd_thumb.jpg
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All I'm getting at is like we've all done with a chaincase....experiment with a variety of ratio's in conjunction with clutching. With a case you had quite a range of ratio's with the same chain. If a guy wants to experiment with a BD he will have to buy a few belts as well as gears. Once you settle on a setup you may not need a tensioner (as polaris has done) but for making changes on the hill it would be cheaper and quicker. That's all-
I wouldn't consider something like that "unscrupulous"... Just another tuning tool.
Are CMX and C3 unscrupulous for having a tensioner???
Since you asked yes, for what they charge you are getting reamed. Of course C3 utilizes the stock case center to center so they had to utilize a tensioner. CMX just didn't put enough forethought into their design or it would be closer to the two sprocket no tensioner design.
With the Polaris design you have twenty ratios available from 1:1 to 3:1 with the same belt. You will never need anything but a 70T belt if you use it as intended. If you want to split those twenty ratios further then by all means make a tensioner.
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dub
Well-known member
We are building a Pro 4 late model for my son that has a 2.3 Ford motor...This motor puts out over 300 HP at 8, 000 RPM, in a 2,000 lb car and guess what links crank, cam & intermediate shaft together??? Same style belt! It will work just fine, we utilize these in our packagaing machinery as well, on an absolute 24/7 consistant basis.
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