I cant figure out what type i have on my 97 LT1, im told 4 wires = wide band and 3 wires= narrow band.

 

A stock 97 LT1 has four 4-wire narrow-band O2 sensors. There is one in front of each cat, and one behind each cat. No F-Bodys left the factory with wide-band sensors.

 

So i guess the only way to goto a wide band is to manually add one for referance only.

 

You have to add another O2 sensor bung, and install a wide-band sensor, a wideband controller and a wideband gauge. The problem is, where do you locate the wide-band sensor? Each bank of the engine is controlled independantly. That's why you have two pre-cat narrow-band sensors. If you locate the sensor in one bank of the engine, you know nothing about the other bank. If you put it in the Y-pipe merge, you only see the "average" of both banks. A problem on one bak cold be masked. You can get dual wide-band sensors, but now it's getting expensive.

Another alternative to adding a bung would be to get a wide-band sensor and a wide-band controller that has a narrow-band emulator output. That converts the wide-band's 0-5V signal to the 0-1V signal the stock PCM is looking for. That way the wide-band controller can drive both the A/F ratio gauge, and provide the required PCM input for A/F ratio control. Again, to do it right, you would need dual sensors.

FAST and Altronics make dual wide-band controllers. Innovate has some interesting products too,