Most people here are V6 oriented. ECT is a good thing to mention, if you've got a colder thermosate that's good, but you'll need to reprogram the fan come on temp to make full use of it. When my dad first turbo'd his Focus with the stock thermostate he was seeing 220F at idle and 200F at highway speeds at 90F+ days. That was way hot. He bought a 180 thermo and had the settings in the ECU changed and the temps came down quite a bit.
Also I'd shoot for mid to high 11:1 AF ratio under boost. You might be able to lean it up in the higher rpms where there's less time for it to detonate, but in the mid range, keep it safe and rich. I wouldn't run 12:1 AF without race gas or water injection.
2000 Rio Red I4 Cougar
200whp & 210wtq at 9psi
254whp & 276wtq with NX 35shot
WRX TD04 Turbo, Cut Short Shifter, Strut Tower Bar, 17" ZN Wheels, Roush Springs, Starion Intercooler, NX 35 shot, HKS SS BOV, Full 3" exhaust,StreetFlight Chip
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