PFS purple box vs. stock ecu - which one should I use?
 

Current engine mods:

M2 intake, hi-flo cat, JIC exhaust, rx7store.net downpipe, Greddy SMIC.

When I bought the car earlier this year, it came with PFS piggyback and a laptop with different map settings. I guess the PFS are also preloaded with default map setting as there is a knob indicating Low, Medium, High. I hooked up the PFS and turned the knob on the Low setting. The car runs good (it ran good with stock ECU but the boost was very choppy) and my boost gauge indicates a really smooth boost curve, nice turbo transition and peaks at 0.8bar. I understand that's a little high but still safe.

Now, I know the PFS is a really old system and I don't have a wideband O2 sensor to fully tune it so I want to know is my car better off with the stock ECU or with the system in? I plan on taking the car to trackdays.

Also, since the PFS came with a laptop and a software to play with all the settings, are there different maps out there where I can download maps to better fit my mods?

Sorry for the long post and thanks for any tips.

Power FC!

Use the PFS piggyback until you can go with a power fc, it's a decent set up and you can may good power.