|
Message
Just read about an extended range O2 sensor in the Turbo
Magazine. It is mentioned in connection with a mixture measuring gadget. Ever
heard of that? could this mean anything for our use? Or is it like any other O2
sensor. The gadget is offered by INNOVATE MOTORSPORTS.
Richard
Sohn
Hi
Richard,
I've heard those sensors
referred to as "wideband" sensors. I have an FJO unit in the RX-7 (which
I'm keeping now that I'm still employed) that is accurate from 10:1 to 20:1
ratios. These are expensive, with the sensors going for about $160.
There is a DIY wideband outfit "down under" somewhere, that sells kits to build
your own unit much cheaper, though the sensors are still the same price.
In the car, it's great,
because we set the AFR for about 11.5:1 under boost, which can't be accurately
read by a normal sensor. At light throttle, the ratio is sometimes pegged
at 20:1. I talked to Tracy about using one of these in the plane, but he
convinced me that it wasn't worth the money, since the normal sensor does fine
with the EC-2, and EM-2. Also, going through a $20 sensor every couple
hundred hours due to lead contamination isn't a problem, but spending $160
for new sensors would be painful.
Cheers,
Rusty (my prop hub is
bare)
|