chipping is just another tool to tune, it helps if you can custom write chips like I can. But even so the ability to manipulate sensors, revlimits, vtec crossover, for the layman is nice.

O2 sensors measure the pressure of oxygen in the exhaust gas, ****ing get over it: here

but even beyond all of that, an OBD1 system will eliminate the 2nd 02 sensor location behind his cat, which is causing problems (we think).

However, as it stands the AFC hack is a pretty decent way to tune for a turbo. The Honda ECU maps don't have the enough resolution (they cut out at a very low MAP, to make them less usefull for turbo tuning)

Now if someone was ingenius enough to code a rom that realized when you reached the end of the millibar table, and then jumped to a routine, that used a multiplier with the start of the fuel/ignition map, that would be quite a hack

And your contradicting yourself, if the chip does not suite your purpose, you can tune around it with the AFC. However you will definitly benefit from the more agressive fuel curves.

Careful though, california people you have shitty gas, so you probably want to couple the turbo with colder/or less gapped plugs.

(see 1stgencrxer, I'm trying to be more mindful of peoples locations)

And WHO exactly spends most of their time in open-loop operation??? Unless you race everywhere, you probably spend quite a bit of time at partial throttles...

OH, and the GSR ecu is fine, it'll run P28 roms, no problemo, and if you got it for a good price, congrats, check out what the P72 goes for on ebay, might be worth your while to sell it and grab a P28, plenty of off the shelf chips available for that one.
-PHiZ