Hi,

I came across a piece of software called StreetDyno: Beretta.Net: Goodie Bin

It will calculate your wheel HP based on a sound file you provide it from the ignition system.

Now I have no idea which exact signal I should record, on Toyotas I've read about people using their Ig output which I think has one pulse per cylinder firing.

Does any such output exist on the WRX ECU on a classic? That is one output showing firing of all cylinders?

Has anyone used this software? What did you use for the input?

Thanks.