EcoRenovator - View Single Post

mechanic · 08-07-15, 10:29 PM

I'm not sure on the efficiency of the automotive type cvt's but the snowmobile ones are quite inefficient. I used to tune them on a dyno (read at the track) and a sled with an 140hp engine was in the 50's at the track (there's a chain gear reduction to rob power on the way there too)... They are necessary in the snowmobile application though as it would be pretty hard to shift gears while plowing a couple feet of snow, especially with a peaky high performance two stroke that makes max power in a 300rpm window over an 8500rpm range...

08-07-15, 10:29 PM	#6
mechanic Apprentice EcoRenovator Join Date: Aug 2014 Location: Saskatchewan, Canada Posts: 117 Thanks: 10 Thanked 16 Times in 12 Posts	I'm not sure on the efficiency of the automotive type cvt's but the snowmobile ones are quite inefficient. I used to tune them on a dyno (read at the track) and a sled with an 140hp engine was in the 50's at the track (there's a chain gear reduction to rob power on the way there too)... They are necessary in the snowmobile application though as it would be pretty hard to shift gears while plowing a couple feet of snow, especially with a peaky high performance two stroke that makes max power in a 300rpm window over an 8500rpm range...