Oxygen Sensor Question

[vegastre]

Oxygen Sensor Question

I'm in the process of installing a 3800 Supercharged engine in my Astre. The question I have and its sort of a head banger for sure. I will only be running one 02 located on the passenger exhaust side because the FWD stock 3800 only runs one 02 before the cat with the driver side exhaust dumping into the passenger side both mixing into the one 02 sensor.

The plot thickens because I have converted the 3800 to a RWD and two separate exhausts while retaining the one stock 02 sensor location on the passenger side. The twist is the stock SC computer only provides for one 02 .

The quick answer would be to locate the 02 down stream where the two exhausts meet which for the H-Body is way far down stream almost to the middle of the car. Not exactly ideal according to my research.

My question? Would it hurt to leave it in the stock location and read only one side. I know Holley does this and a couple of others.

[spencerforhire]

I see nothing wrong with having an o2 sensor in one side only; I've had a few 88-95 GM trucks with aftermarket dual exhaust and they only had one sensor.

[cjbiagi]

I agree, if everything is running normal both sides should be about the same so just reading one should work. There may be a slight difference from side to side readings but shouldn't be off by much.

[vegastre]

That's what I'm thinking and 'if' for some reason the 02 won't read right with just one side exhaust I think a wide band 02 will do the deal. I thought wiring this SC would be fun but its kinda a pain with all the soldering. I was going to tune the PCM myself but I found a guy who will do it for $60 bucks. So it goes.