Datalogging RPM signal

[Bill Shaw]

One suggestion would be to wrap a few turns of 18 gauge wire around the #1 plug wire,  then feed this signal into one of the unused inputs on the WB-LCD.
Logging the 2 channels would give you RPM in sync with AFR.  It would take a little playing to get the configuration right,  but something like this
should work.

Bill

Stephen Andersen wrote:

>
> Anyone have any pointers on how to log the rpm signal with the
> dataq or B&B "cheap person" data acquisition boards?
>
> I figure you can either use an inductive pickup or possibly
> intercept the signal to the ECU/DME.  Problem is that I am
> an electronics idiot, and I have no idea what form that signal
> usually takes and/or how to intercept and capture it.
>
> What I really want to be able to do is log AFR/O2 volts for the
> WB with RPM (and possibly MAF and TPS which are simple voltage
> signals) to review after tuning runs, dyno pulls, or runs
> down the strip.
>
> Anyone got any advice?
>
> Thanks,
> Steve
>

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