I thought this was interesting and was curious to know what your guys opinions and thoughts were about AEM’s shaft on dyno system.
HOW IT WORKS
AEM uses a set of laboratory-grade strain gauges inside of a supplied slip yoke to measure Torque at the driveshaft. Essentially, the Dyno-Shaft slip yoke becomes the sensor for measuring driveshaft Torque. This is combined with a driveshaft speed sensor to precisely measure the rotational speed of the yoke to determine RPM. The combination of real Torque and RPM readings allows the Dyno-Shaft to output Torque and Horsepower numbers as accurately as any dynamometer but in a more useful setting, and eliminates all of the inaccuracies associated with accelerometer based systems.
The data broadcast device (Controller) for the Dyno-Shaft yoke is non-contact, does not have slip rings, does not require batteries and is maintenance free. This Controller installs over the transmission tail shaft housing and allows information from the Dyno-Shaft to be transmitted via AEMnet (AEM’s CAN-bus communications network) to a data logger, AEM or other programmable engine management system, or custom dashboard via a single connection.
This could likely be used as an excellent realtime closed loop calibration input (like a wideband O2) but will likely be mostly realized as a HP GAUGE in shitty underpowered ricer cars.
In my experiences with strain gauges, which is mostly limited to lab stuff in school, they’re pretty picky. Things like temp, electrical noise, etc messes with them, those are pretty abundant in a car.
Interesting. I’d be interested to see how they hold up over time. Great idea though. I think a lot of tuners will try them out but I think what Newman said is also most likely the case.
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