Home brewed cheap Dyno

[Steven A. Dean]

Alain:

So what sort of home hardware are you using to absorb the 100+ kilowatts of
power that most automobile engines produce?

At 09:06 AM 5/3/97 -0400, you wrote:
>After reviewing the home dyno software package available on the F-body list
>it got me thinking that if you want an accurate home built dyno with the
>least amount of money invested the best way to go would be similar to what
>is already done but instead of calculating the vehicle speed with the trany
>diff and tire ratios why not use the speed sensor that is buried the dash
>of most modern cars, they give something like 2000 pulses at 60mi/h and
>then get an inductive pickup to read the engine speed like the Dynojet
>chassi dyno do except instead of reading the car speed they read the drum
>speed.
>The rest is pure math.
>
>The home dyno records the pulse from the inductive pickup on a small plain
>voice recorder and then feeds this to a sound blaster card to produce a
>WAVE file then reads this file.
>
>A stereo recorder could be used to record the inductive pickup and the
>speed sensor one on the right channel and the other on the left to get two
>distinctive pulse patterns and produce a WAVE file then read it and
>calculate what we need to get car speed engine speed and the rest for HP
>and torque.
>
>Very cheep way to get a reliable chassi dyno.
>Most of us have a inductive timing light, computer with sound blaster.
>Only thing missing is a stereo tape recorder (a stereo camcorder would be
>perfect)
>And a few feet of cables and a few plugs and the big one the software to
>convert the pulses in the WAVE file to readable format for you favorite
>database program.
>
>Any one interested in writing a simple bit of software to convert this?
>
>
>// marchildon at usa.net                                            //
>// Alain Marchildon                                              //
>