Ok, I thought pr3's were from SiR's & pw0's were from XSi's - is that right? Also, are there any differences in fuel/ignition mapping or rev limiter?

Thanks...

Eric

 

I believe it's the other way around, PR3's are from XSi's and PW0's are from SiR's.

 

actually to teh best of my knowledge the PR3 is JDM SiR and Xsi and the PWO is euro spec SiR

 

pr3 rev limit is 8200 I believe
pw0 8000
auto 7600

 

pr3 is xsi. rev limit is 8200.
pwo is SiR, rev limit 7800 or so.

 

I'll back that up.

Also, there is always a debate over which cars came with which ecu. I have a Pw0, and i know for a fact it came from an 89 or 90 SIR.

 

PW0 = 89-91 CIvic/CRX SIR (can also be auto, but came from 90-1 Integra XSi)

PR3 = 89-91 Integra XSi/RSi (can be auto)

both have the same rev limits, the programming on the PWo is different, also it doesn't get as much aftermarket ECU support

PW0 is also found in European CRX/CIVIC VT

 

Pw0 DEFINATLY does not have an 8200 rev limiter, its 8000k flat like was said above.
BTW eg6ajk, any chance that you have a stock PW0 program? I've gone turbo and i need something that still supports the knock sensor.

 

100% correct
Finnaly someone got it right