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BARONROJO · 2023-06-23T20:05:09Z

I have a DJ 250i motorcycle dyno and after having suffered countless problems with the EX+ electronics (DJ’s older gen) I’m going to update it to YourDyno. As I want to get rid of all DJ electronics, I’ll go for the Standard V5 instrumentation unit + eddy current brake power supply. i know I have to order a load cell but I’m not sure about which one. In the picture attached (no picture, this is my first message and I can’t find how to do it) you can see the load cell placement in this dyno is not vertically placed but at an angle of about 30 degrees (yet to be accurately checked) So, I think the maths for the load cell will include a factor of about 15% (1/cos(alpha)) but I’m not sure of the right load cell to order. The dyno is rated at 750 hp but I can’t foresee testing bikes of more than 200 hp. As the cylinder diameter is roughly 50 cm, at a max speed of about 300 km/h the max rpm the drum will reach is around 3200 rpm. Considering a 200 hp bike the calculator in the site and the angle increase factor I’d need a 172 Kg load cell, so, I guess a 200 Kg load cell in on the safe side. I’d like someone more experienced to confirm this value is correct Besides this, the retarder in the dyno is from Frenelsa but I don’t know it it’s rated at 96V or 192V. Does someone know how to verify this (or what DJ uses). In some of their documemtation I’ve read that wiring is different for 120 V vs 240 V mains, but I don’t know if this has some influence to connect the YourDyno power supply. I have more questions related to the use of a Zeitronix ZT2 and ZT3 combo I use for datalogging on twin cylinder (Ducati) bikes but now it’s a bit early for more questions!

Converting a DJ 250i motorcycle dyno

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WEI YI

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@baronrojo

I have always wanted to read the TPS & RPM data of DUCATI and YAMAHA through CAN. Can you please tell me?

Cheers

Posted : 30/01/2025 7:58 am

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Converting a DJ 250i motorcycle dyno

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