Badger** Posted December 20, 2021 Share Posted December 20, 2021 1 Quote Link to comment Share on other sites More sharing options...
mnstang Posted December 20, 2021 Share Posted December 20, 2021 Track dyno, dumb Quote Link to comment Share on other sites More sharing options...
Crnr2Crnr Posted December 20, 2021 Share Posted December 20, 2021 @Tommcat Quote Link to comment Share on other sites More sharing options...
Tommcat Posted December 20, 2021 Share Posted December 20, 2021 i hate when people think there is some exact conversion number for track to engine power, it just doesnt work that way. 2 Quote Link to comment Share on other sites More sharing options...
Doug Posted December 21, 2021 Share Posted December 21, 2021 A good comparison would be motor dyno compared to track dyno on the same sled. That would show how much HP is lost in the drivetrain. 1 Quote Link to comment Share on other sites More sharing options...
Badger** Posted December 21, 2021 Author Share Posted December 21, 2021 3 hours ago, Tommcat said: i hate when people think there is some exact conversion number for track to engine power, it just doesnt work that way. You're the person I wanted to check this out. I have never seen a track dyno before. If you put two different brands on this same dyno what would the out come be? MACH VS SRX https://www.supertraxmag.com/features/mach-vs-srx/n4230?fbclid=IwAR0fk7t9qETWVVXyEWsk6JFuDeIKu8jpFtujz5-7W5UMuW_zojBGUqHXjz0 Quote How about this? What if the Ski-Doo does put out exactly 180 HP and the SRX does put out 10-15 more HP than the Ski-Doo? What would be your expectation then? I'll save you the trouble. The Yamaha would be faster at the big end - for sure. Quote Link to comment Share on other sites More sharing options...
Tommcat Posted December 21, 2021 Share Posted December 21, 2021 21 minutes ago, Badger** said: You're the person I wanted to check this out. I have never seen a track dyno before. If you put two different brands on this same dyno what would the out come be? MACH VS SRX https://www.supertraxmag.com/features/mach-vs-srx/n4230?fbclid=IwAR0fk7t9qETWVVXyEWsk6JFuDeIKu8jpFtujz5-7W5UMuW_zojBGUqHXjz0 You could put 5 mach z sleds on a track dyno, clutch all 5 differently, and get 5 different hp numbers. No changes in the motor or tune, but yet still different numbers. And that's why there is no magical formula to calculate engine power. A track dyno is good for figuring out clutching and driveline improvements, and can certainly be used to show engine power gains IF nothing else on the chassis is changed, but they're fairly useless if comparing engine power from one sled to another 2 Quote Link to comment Share on other sites More sharing options...
mnstang Posted December 21, 2021 Share Posted December 21, 2021 1 hour ago, Doug said: A good comparison would be motor dyno compared to track dyno on the same sled. That would show how much HP is lost in the drivetrain. It would in theory. But if the Dyno doesn't load the machine exactly the same as a real world condition it's still kind of meaningless. It sounds like that dyno isn't loading it at all, spins up way faster than the machine would actually accelerate. Quote Link to comment Share on other sites More sharing options...
Doug Posted December 21, 2021 Share Posted December 21, 2021 (edited) 4 minutes ago, mnstang said: It would in theory. But if the Dyno doesn't load the machine exactly the same as a real world condition it's still kind of meaningless. It sounds like that dyno isn't loading it at all, spins up way faster than the machine would actually accelerate. Never put any faith in a track dyno because there is to many variables. As far as dyno for a motor your only looking at the power curve for clutching unless making changes to the motor. Edited December 21, 2021 by Doug 1 Quote Link to comment Share on other sites More sharing options...
mnstang Posted December 21, 2021 Share Posted December 21, 2021 1 minute ago, Doug said: Never put any faith in a track dyno because there is to many variables. As far as dyno for a motor your only looking at the power curve for clutching unless making changes to the motor. Agreed. Quote Link to comment Share on other sites More sharing options...
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