For details of the development of this tune, see the thread here:
topic3241.htmlCar:
2002 WRX Sedan
Mods:
OEM BCS with 1.0 mm restrictor pillWG Actuator adjusted to 7.5 psi
Panel Filter
GP Moto Elbow
Up Pipe
TBE
JDM STI TMIC
You will need a 1.0 mm restrictor pill from Subaru. The P/N is 22326AA010 and it is $0.93 from King of Parts. I recommend buying it instead of drilling or making your own since making your own will give you slightly different results.
The wastegate actuator must be adjusted to 7.5 psi. Set the entire WGDC max table to 0 and do a 3rd gear WOT log from 2000 to 3500 rpm. Your boost should look like this plot. Adjust the actuator until it looks like this. Be careful not to burn yourself. If you have a hand pump, you can just hook up the hand pump to the actuator and check to see what pressure the wastegate door opens at.
Here are some boost logs plotted.
I also overlaid a TD04L-13T (should be same as TD04H-13T) compressor map over the 3rd gear log.
It looks like in the 3000-5000 rpm range, there's still quite a bit of room to push the turbo. In the 5000+ rpm range, we could probably run more boost, but at the risk of leaning out due to the injectors. If anyone wants to try to push it, buy yourself a spare TD04 (just in case) and let me know.
