Hi recently purchased a power fc and might purchase the aem failsafe gauge. Can I tune the pfc with the aem software through and controlling things with the commander.

 

If you give the wideband failsafe and RPM signal from the ECU, you can use the WBFS to log engine speed, MAP, and the failsafe high/low channels. You can use that data to make changes to the PFC with the commander but it will be better to have a Datalogit, send the WBFS 0-5v AFR output to the Datalogit, review logs and tune that way. It will be beneficial to have ECU data along with the wideband O2 data. One without the other isn't quite enough.

EB Turbo

 

thanks for the info

 

how can i use it to retard timing. using the know readings from power fc?

 

You have to use a aftermarket ignition box with timing retard capability and use the failsafe to trigger the timing retard when your Afr goes leaner than you want, you set that up with the AEM failsafe software. I have a crane ignition but I don't have the separate timing retard control for it. I'm sure you read my recent thread about how I setup my AEM wideband and WI failsafes to dump boost via the wastegate and the blow off valve.

 

yes i saw those, thats why i wondered if it would work with the pfc

 

If you run a split, I suppose you could also drop the leading ignition--in lieu of ignition retard (for those of us who don't have that feature). That's in addition to reducing boost, which I think is a good idea.

The advantage of manipulating the ignition (or cutting fuel) is that it can be done almost instataneously--as in microseconds after a fault is detected.

I do have my boost solenoid interlocked to the WI failsafe, but I still think there's a benefit to having a faster responding control hooked to the WI and/or AFR failsafe limits.

Just my thoughts....

Oh, and one thing: avoid mechanical relays in the control circuits; they're too slow. Transistor switches, opto-isolators or solid state relays are indicated for best (fastest) results. Your typical open collector output is also good.