i'm building a turbo b16 in my rex using hondata 2b. do i need to have two o2 sensors hooked up or just one. the shop that did my original swap uses just one o2 sensor on the exhaust manifold.

 

also, when my turbo's put in does that mean i need to have 2 o2 sensors plugged into the downpipe?

 

It depends on what your ECU expects - tell us which ECU you have. I don't think Hondata requires 2 O2 sensors but I'm not sure if you're running a PR3... or if the S200B is even available for the PR3

 

If your ECU requires 2 O2 sensors then it's an OBD0 PR3 or PW0. Well it could be a 96+ OBDII but I seriously doubt that. In order to run Hondata would require coverting to OBDI.

 

i'm actually running hondata stage 2b on my pr3 ecu. so what do you guys think?

 

The problem with the pr3 ecu is it needs to have the o2 sensors in the right location for it to work right. That is hard to do when you have a turbo setup. Your two options are to run the open loop file or your best be would be to switch over to obd1.