beta14

I'm finishing my custom downpipe and I'm really confused about where to put the O2 sensors. I already have done a lot of research on it and I haven't found many suggestions, I do know that the o2 sensors are m18x1.5 nuts. The application is a OBD-0 B16A1 w/ a T3 (.60 / .63AR). My stock header had 2 o2 sensors right next to each other. Thanks

CivicSiR

Are you using your B16a VTEC harness? Use an O2 sensor off a 94+ del sol VTEC. It should work fine.

HMT-Admin

Do the same... 2 o2 sensors right next to each other in the downpipe (anywhere). Thats what we do with our OBD0 B-series..

beta14

I'm just using my CRX Si harness with the extra 4 wires added, it's a 2 O2 sensor setup.

88crxSi

my crx only has 1 o2? 88 si ?? its up on the top of the exhaust header near #1

HMT-Admin

As stated he has a B-series swap, more than likly running a PW0 or PR3 which requires 2 o2 sensor in the 4wire swap.

like I said, put them right next to each other, and you wont have a problem.

Jeff

beta14

Yep PR3, I was just wondering how far down to put them in. When I took my car out for my first FI test runs I only hooked up the primary and put it in the turbo's O2 housing, but I think that was too hot and burnt up that O2 sensor.

HMT-Admin

Nope, lots of factory o2's use the "02 housing" for a o2 spot, so you should have no problems unless your running extremely extreme lean. Only time I have ever burn up a o2 is using leaded race gas. Like I said, anywhere downstream will be fine.

Jeff

beta14

Yeah my plugs show that I was running pretty lean, my car is down now until I go to the dyno. I'm also going to change out the headgasket and check all the valves.