setting ignition curves without dyno

[Clarence L.Snyder]

Greg Hermann wrote:
> 
> >Tom Sharpe wrote:
> >>
> >> Greg Hermann wrote:
> >>
> >> > >How about this idea..............actually build a dyno into your car.
> >Put a strain gauge on the driveshaft. You might need to cuctom make a
> >shaft with a torsion bar in it.
> 
> NO--good, properly done strain gauges on a standard drive shaft would do it.
> 
>  If so, put in an inductive device to charge the battery for the transducer
> as well, and a centifugal switch
> >to turn it on when the shaft rotates.
> 
> If you are saying you have a way to pick up the output from the gauge
> bridge on the shaft without slip rings, PLEASE give more details--because I
> already have a tranny with an hydraulic retarder which turns at converter
> turbine speed (and a lock up clutch), So I wanna put the strain gauge
> bridge on the flexplate. But slip rings would be a machinist's nightmare in
> this location. With a non-contact pick-up, I would have a dyno!!
> 
> TIA for any ideas--Although, as I write, the idea of putting the bridge
> onto the converter housing--picking up REaction instead of action-- has
> popped into my head! Have to ponder on that one some!! Might only require
> enough dyno time to calibrate the bridge output!
> 
> TIA for more ideas!!
> 
> Regards, Greg
There are strain gauge units with wireless telemetry built in. Have not
got the manufacturers or venders names handy, but are used in industrial
vibration analyses etc. I know one of the major suppliers is british.