Why is telemetry so bad?
Hey all, I wonder if it's just me, but the telemetry is so bad on my jato and revo. Temp comes in at 305* but with a $100 laser temp gun it comes in at 185* and I have the temp wire at the same level as the glow plug. Speed is wayyyy off even after adjusting the gearing and wheels in the app as proved by a GPS comparison, and voltage reads low on a brand new fully charged battery.
I've got the tqi telemetry on my slash ultimate and I've got a $20 IR temp gun. I've found I get pretty much the exact same temp readings as long as I sit the temp gun literally touching the motor when I take the reading. If I hold the gun say a few inches from the motor I get a much lower reading on the temp gun.
The on-board is an accurate temperature reader, however it is taking it at a location not commonly accepted as the true engine reading: which should be at the glow plug. Take any on-board and this problem is evident. It even will change depending on where the sensor is: read much higher if it was over the exhaust port vs behind the carb.
Even when sitting still the speed may show that it is moving because it depends on the rpm of the engine and is a calculation. Who knows, maybe Traxxas is working on developing other ways to make it more accurate. Me? I'm not concerned about the current speed (no speed limits where I drive my RC), I regularly cycle my battery and charge it, and depend more on performance and smoke and occasionally take the temp.
I just got the upgraded RX and TX because mine was bad and the sensors were only $6 shipped. It was more of a cool factor.