I got some more time to work on my 05 wagon and again got some surprising results. Since the last tune I added some more key components from Crucial and spent a good amount of time on the re-tune.

Current setup on my 05 WRX Wagon:
Crucial Uppipe
Crucial Downpipe
Crucial catless mid pipe
Crucial prototype catback
Crucial P&P&C OEM headers with Injen cross pipe
Tuned with Cobb ProTuner

Some notes on the tune:
When I started out with my usual base map for this type of setup, I found that my car didn't want to run the timing advance I generally like to run. So I dropped timing a couple degrees in the necessary places and started bumping up the boost and leaning it out watching EGT's closely. I ended up with a much more aggressive tune than I would generally provide for a customer on California 91 octane. The car is running 17.5psi in the mid range tapering to just under 14psi by redline. A/F is at 11.4:1 in the mid range going to about 11:1 by redline. This is significantly leaner than I generally like to run on our gas and thus the EGT's climb to just over 1600F on a pull through 4th gear. With the current setup, this approach deffinately made the most power but I would be very hesitent to run a customer's car like this. My theory is that my stock spark plugs are limiting the timing advance I can run so I'm going to switch them out and try my more conventional approach soon.

In the meantime, here are the results of the leaner approach:


The results astounded me and this is now officially the most power and torque I've ever seen a stock turbo WRX make on 91 octane. As I've said, however, this is quite an aggressive approach and I would not be comfortable running such a tune on someone else's car. Hopefully with the addition of colder spark plugs and a richer approach I'll be able to lower EGT's without loosing much power.

As always all and any comments and questions are welcome.

Thanks