[Diy_efi] Strain gauge on engine mounts

[Marc Reviel]

A little pricey, but definitely the most accurate: 
http://www.land-and-sea.com/rotary-shaft-dyno/rotary-shaft-dyno.htm



>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


-- 
Marc Reviel

PowerLogix
http://www.powerlogix.com