OT: Logging g-foces ... anybody interested?

[Garry]

I've still got a project flying around that I more or less scrapped, but thought I could use some of the parts for more interesting causes ... like e.g. having a small 2d accelerometer that one could hook up to the analog ports of either EFILive V1 or V2 (does the new enduser box have two analogs, too?) and then log g-foces during a quarter mile or AutoX run ... (or regular street driving, of course).

I don't have anything to show yet, nor further details ... just checking if there'd be any interest in getting something like this ...

[nevinsb]

I would be interested (Since I use the truck for autocross), but never have had the money to shell out for the accelerometer.

[Garry]

The good thing is, by using EFI black box logging, the g-force HW can be rather simple, will probably build a prototype some time this week (guess being off of work just means you need to find some other ways to keep yourself busy :) ) and see if it does what I guess it should ...

wondering, will BB logging work if EFILive is only connected to a notebook for power? :) Guess not ... :(

[nevinsb]

Looks alright to me LOL
http://i172.photobucket.com/albums/w4/nevinsb/DSC02520.jpg

[joecar]

V2 has four 0-5V analog inputs (in addition to the two 0-12V discrete inputs and two K thermocouple inputs)...

You can have inputs from 2 or 3 axis accelerometers...

the only problem is that the sample rate may be tied to the PCM->scantool frame rate (10f/s for LS1B, 40f/s for E38).

[badzy]

just update us..hope you'll come up with a good project Garry

[Garry]

V2 has four 0-5V analog inputs (in addition to the two 0-12V discrete inputs and two K thermocouple inputs)...

You can have inputs from 2 or 3 axis accelerometers...

Unless you've strapped some JATOs to your car and going Mythbusters on us, I don't think three-axis is really needed ;) Of course this would mean it can be slightly off as soon as the surface isn't level, but I see it mainly as a little "bonus info" for those serious racers among us ;)


the only problem is that the sample rate may be tied to the PCM->scantool frame rate (10f/s for LS1B, 40f/s for E38).
Yes, that is a limit with it ... but should still be nice to get a plot of the car performance that will be quite interesting ;)

On a side note, one could also use the serial input on V2 in order to get more precise readings ... of course that would mean dropping a WB readout (if you use serial) ... are there any docs available on the serial protocols currently supported by EFILive? Could make the circuit behave like a two-channel WB :)