[Diy_efi] Strain gauge on engine mounts

[John Gwynne]

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


This is a similar setup for a contest sponsored by circuit cellar.  It 
includes the design and software.  DIY_driveshaft_dyno anyone? :)

http://www.circuitcellar.com/flash2002/second.htm

abstract:
The Horsepower Monitor measures the torque in an automobile?s driveshaft 
and provides an output to a vehicle data recording system or a portable 
computer via an RS-232 interface. The received data then can be combined 
with rpm measurements from the data recording system to calculate 
horsepower. The system consists of the sensor unit, which attaches to 
the driveshaft, and the receiver unit, which provides the serial output 
signal. Based on a PIC18F252 microcontroller, the sensor unit is battery 
powered and communicates with the receiver via a 433-MHz RF data link.


john