Quote:
Originally Posted by JET02WRX
LULZ.... read what you wrote again.
Its a gauge.... you connect it to a sensor.... and read it. 
In all seriousness though... it tells you what your afr is at any given second. Some even have warning lights that will alert your attention if things get hairy. Its basically a gauge wired to a control unit, which is then wired to what appears at first glance to be an O2 sensor. But a 'wideband' 02 sensor works at a different voltage, giving you a wider, more responsive range of readings.
For example... on Subarus, i look for about 11.5:1 afrs when i'm spooling up and making torque... Then it tapers down to about 11:1 as I hit redline. Turbocharged cars normally require a little extra fuel at the top end. Not because its needed for spark, but because its needed to cool the cylinders to prevent detonation. |
lol, I tried not to... good info tho.