OEM Torsen Diff: Overlay of Torque Distribution at VIR
 

For those interested in how the OEM Torsen differential distributes torque:


Caleb

Awesome overlay + driving! Love all the IZZE products, keep it up!
A guy at work published a paper on using polymer based piezoelectrical material on the inside of the tire to measure road conditions for autonomous cars.
Seems like only a few years from having all kinds of interesting data for track tuning!

this is incredible !

how does this strain gauge sensor attach to a spinning axle?

it would be interesting to create a math channel to calculate the locking ratio.

Would be super interesting to get the same data from an aftermarket diff like OSGIKEN

Very cool stuff :)
AlpineFD check the pictures in the beginning of the video, the sensors are wireless so seems to be just zip tied on the axle.

Caleb, is this an extension of your wireless strain gauge dyno? I'm still getting over the analysis of load distribution as it varied by brake pad.

Did you also used the wireless tech for an internal tire temp/pressure sensor and the accompanying paper: http://www.izzeracing.com/products/e...emperature.pdf

Interesting videos. Can I assume what appears to be higher heat on the left tires, especially the left rear, since VIR runs clockwise (essentially right turns) which load the outside tires?

Same with the torque readings which seem to be higher on average to the left axle.

https://macsmotorcitygarage.com/wp-c...POUND-FEET.jpg


These videos at VIR are a bit of voyeurism for me since I can't even take a driving course there without cobbling my car with an aftermarket roll bar. :)

-- Chuck

Thanks! I really more interested in how my (specific) S2000 handles. Not sure how well a spec-Miata translates. Mid-Ohio allows (or did?) the stock S2000 in their one-day Acura performance driving course (emphasis on road, not track driving) but since I'm now in Richmond (vs Cleveland) the driving time has increased from 90 minutes to nearly 9 hours each way (VIR is about 2 hours). ;)

-- Chuck