im accualy in the proces of building my dyno i wuld like to know how did you balance the roller and i wulkd build mine with 400x400mm dimensions what you think about that i will put better bearings then you did capable of 6700 rpm so i can have runs of 300kmh on the dyno
I figured that because everything was accurately turned from solid material in a CNC lathe , the roller would not need balancing. Ive spun the roller to a max of around 2500rpm with only very slight vibration. So the theory proved correct. It is bolted to the concrete slab of course. Different story if you were to make a welded, fabricated construction of course, then balancing would be critical. Good luck with your build!
Hi I've found your video very interesting but I do have 1 question I'd like to ask how does the dyno measure the torque of the motorcycle ? as I can't see how you can put load on the roller to measure the resistance
the inertia of the rotating mass is all it needs for load. when you change the speed of the rotating mass you use energy. and we can calculate torque from that.
What ruller size and weight would you recommend that you build in a dyno for 110ish hk - i really want to build one that i can roll my harley drag bike on
Hi Nik, have a look here: performancetrends.com/Calculators/Engine-Inertia-Dyno/Engine-Inertia-Dyno.php Basically you want the diameter as big as practical for two reasons: less tyre wear and the mass of the roller will be less for a given rotational insertia. You don't want to have runs less than 6 seconds I reckon. This depends on which gear you choose. And you probably don't want to spin the roller to more than 3000rpm. Things must be engineered correctely or they'll fly appart....which is rather dangerous. Cheers Adrian
I'm happy, thank you for so much information, I'm slowly starting to autograph you too. So the engines that I will put back will be up to 50 hp at the most, now, friend, if I copy you exactly How much horsepower can I use? And how does the action get harder the larger the diameter roller dyno ? And how many turns can I reach? I will work for 13,000 to 15,000 rpm. Thanks i will waiting your answer. And I can someone messege for better connection?
im accualy in the proces of building my dyno i wuld like to know how did you balance the roller and i wulkd build mine with 400x400mm dimensions what you think about that i will put better bearings then you did capable of 6700 rpm so i can have runs of 300kmh on the dyno
I figured that because everything was accurately turned from solid material in a CNC lathe , the roller would not need balancing. Ive spun the roller to a max of around 2500rpm with only very slight vibration. So the theory proved correct. It is bolted to the concrete slab of course. Different story if you were to make a welded, fabricated construction of course, then balancing would be critical. Good luck with your build!
I almost finiah thw dyno and i ended up finding the balancing company tobalanse the roller it ended up 88grams out of balance
@@aca192maric Great stuff! Have fun!
Hi I've found your video very interesting but I do have 1 question I'd like to ask how does the dyno measure the torque of the motorcycle ? as I can't see how you can put load on the roller to measure the resistance
the inertia of the rotating mass is all it needs for load. when you change the speed of the rotating mass you use energy. and we can calculate torque from that.
Where are you guys getting the 300lb roller
It's actually 880lbs (400kg). Turned from 460mm diam solid billet. Have a look here at build blog:
skrunkwerks.com/blog/?avia-element-paging=4
How much this project cost? For a 1000cc does it need changes?
Hello! What software are you using? Thank you!
As he says in the video its performance trends
In your bearing knew MBL grease
hey thanks for the info....
My pleasyre.
What ruller size and weight would you recommend that you build in a dyno for 110ish hk - i really want to build one that i can roll my harley drag bike on
Hi Nik, have a look here:
performancetrends.com/Calculators/Engine-Inertia-Dyno/Engine-Inertia-Dyno.php
Basically you want the diameter as big as practical for two reasons: less tyre wear and the mass of the roller will be less for a given rotational insertia.
You don't want to have runs less than 6 seconds I reckon. This depends on which gear you choose.
And you probably don't want to spin the roller to more than 3000rpm. Things must be engineered correctely or they'll fly appart....which is rather dangerous.
Cheers
Adrian
I'm happy, thank you for so much information, I'm slowly starting to autograph you too. So the engines that I will put back will be up to 50 hp at the most, now, friend, if I copy you exactly How much horsepower can I use? And how does the action get harder the larger the diameter roller dyno ? And how many turns can I reach? I will work for 13,000 to 15,000 rpm. Thanks i will waiting your answer. And I can someone messege for better connection?