[Diy_efi] Strain gauge on engine mounts

[Logan Lingle]

That's interesting.

Perhaps you could employ a couple of small hydraulic cylinders and a 
pressure sensor..   with a PIC to log the data?

hugh at sol.co.uk wrote:

>I would like to have a go at obtaining an output of my engines torque,
>possibly using strain gauges on the two engine mounting points.
>
>It should be possible to subtract the output from one to the other it
>should equal the torque being produced by the engine.
>
>Using one on each mounting point will, I hope, allow you to delete the
>effects of bumps in the road.
>
>The theory is that when you are accelerating on a smooth road one side will
>be in tension and the other side in compression.
>
>Going over a bump, each strain gauge will be compressed by the weight of
>the engine, but the difference should I think still equal the engine torque.
>
>There will obviously be calibration issues, but I am looking for a tuning
>aid rather than a definitive torque number.
>
>Measuring torque using the prop shaft would also be good, but making a
>flange to hold the strain gauges and then transmitting the information
>might be tricky, although I did find this
>http://www.a-tech.ca/sup_page/ATI2000/Ati2K_Radio.htm system which clamps
>to the prop shaft and looks a bit expensive for my budget.
>
>Hugh
>
>
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