[mbtoloczko]

Originally posted by Red Wolf
One other thing you might want to consider about an air/fuel ratio gauge is that the vast majority of cars use what are known as narrow band o2 sensors, which can only tell if the ratio is off by a relatively small amount.

On modern cars with closed loop computer systems, all you will see under normal operation is the meter bouncing from one end of the scale to the other and back. Under wide open throttle, most cars go into open loop mode, and the a/f ratio will become a fixed value.

A wide-band o2 sensor is a serious tuning tool, with a serious pricetag to go with it. The sensor alone retails for around $600. The advantage is that a wide band will show exactly what the a/f ratio is, instead of just indicating if its high or low.

YMMV, as I learned this from the Toyota Supra and Mitsubishi Eclipse communities and I don't know how this applies to the SVX.

John

So, are there O2 sensor gauges that are calibrated to a narrow band O2 sensor, so that when the gauge actually goes into the "lean" range, the a/f mixture is truly lean? Or does "lean" simply mean something somewhat less than stoic without being able to say that its within a range of actual values?