I have a d16 that I have installed hondata s300 on. I have only tuned the car in open loop so far to drive around on naturally aspirated. Right now I am going through and setting up a greddy turbo kit to work on the car. My downpipe has no provisions for any 02 bungs that came with the kit. I am trying to decide basically if I should run 3, 02 sensor bungs in it? Two for the factory 02 sensors and one for my wideband or if I should delete the factory ones. This is my daily driver so I would like to keep decent gas mileage and drivability. If I do run an upstream sensor I am also concerned with the upstream 02 sensor dealing with the heat of the turbo.
thanks, kevin

 

S300 doesn’t utilize secondary O2, only primary (since it’s OBD1). The simplest method to add a WBO2 is to install one that can also output a narrow band signal. That way you can run closed loop like it’s a stock NB sensor or open loop as a WB sensor and you don’t need to pick up a wrench at all.

 

You can always weld a bunge on it. Start with one.

The original greddy downpipe had one on it.

 

It isn't the original, it is a 2.5" downpipe. I am running a aem wideband. I ran the white wire to the ecu already. I believe it is d10 if I am not mistaken. So you are basically saying my stock 02 sensors in place aren't working now anyways. I left them hooked up until I could get more clarification just to be safe.

 

You only need one sensor. The secondary o2 sensor is only to monitor the catalytic converter's efficiency on OBD2 (as said, OBD1 does not use this sensor). S300 will allow closed loop control with a wideband input - you don't need a narrowband input any longer. Good luck with your build.

 

Yep no 02 sensors in my build.

 

I'm just gonna run the wideband sensor as stated. Now I just have to decide on if I want to take off my front lower engine mount for the intercooler piping or modify it to keep it. Do most of you guys run without the lower front mounts on a turbo setup? I autocross so I am a bit nervous about the lateral stress on the trans casing.

 

Kevin - I'm using Hasport mounts, 62A durometer, and only using the three main mounts. I've had my setup this way almost 2 years, with the last 14 months being boosted. I do not autocross, but do drag race occasionally. Full disclosure - I have not inspected any of my chassis mounting points for cracking since I installed the engine 2 years ago. My chassis is an EG - I'm assuming yours is an EK since you are talking about 2 oxygen sensors?

 

Yes mine is a 97 ek 4 door. I have the 1320 mounts that are 75a. My lower front engine mounts are the oem honda ones.

 

I'm also using lowest durameter hasport mounts. I've actually removed my passenger side front mount to make room for stuff but have kept the driver side,ONLY because I have to have the bracket there for A/C so I figured why not lol. I don't think it's really doing anything at this point.
I've been to the track & autocross events with some mountain runs and daily driving. All without any issue.

 

I routed around the lower engine mount. It is a tight fit but works.