Rotax 912iS Dyno Testing And Engine Comparrison At Edge Performance AS

We are doing extensive dyno testing of the Rotax 912iS, installing a 1484cc big bore kit, and comparings its performance to some of our Edge engines.

[@flyinghare123]

Very cool! I really like how you do a real fair apple for apple comparison in a super controlled scientific way, and then present that data graphically. Keep up the great work Thomas!! Chris-

[@EdgePerformanceNorway]

Thanks Chris 😊👌🏻

[@photon1972]

Excellent. Thank you for sharing.

[@tinolino58]

I love the red hot glowing exhaust pipes. Very concerning design feature.

[@gabrielalejandroanguloagui4055]

I have a question. I'm designing a test bench for that engine. How many hours or time can this engine be tested, and can you share any links for designing a test bench for this engine?

[@DIYPackraft]

Very cool. How does the big bore kit affect fuel consumption?

[@EdgePerformanceNorway]

Only 2-3ltr hr at wot and nothing pretty much at cruise.

[@DIYPackraft]

@@EdgePerformanceNorway Cool, that makes sense. Impressive!

[@foesfly3047]

I thought for sure, you were going to reflash the Rotax ECU and squeeze some more from the UL912IS. Do you offer that service?

[@EdgePerformanceNorway]

No. It’s not possible

[@foesfly3047]

@@EdgePerformanceNorway Another +1 for the EP version.

[@grzechuk6776]

Thomas, any incoming upgrades to 912is?

[@EdgePerformanceNorway]

Maybe a turbo normalized kit at some point

[@matthewmyers9745]

@@EdgePerformanceNorwayI would buy that kit

[@roberttammerawitchey4652]

torque values are 'through' the gear reduction box?

[@EdgePerformanceNorway]

No, crank torque. PTO TRQ is propeller flange torque.

[@roberttammerawitchey4652]

@@EdgePerformanceNorway oh, It sure looked like the dynamometer was attached to the gearbox.

[@boydw1]

@@roberttammerawitchey4652 It was. Engine torque can be calculated from PTO torque, as the gear ratio is known. You can see during the dyno pull that both engine & PTO torque are displayed. Engine torque was used in the graphs.