*eurospeed951*

http://www.alamomotorsports.com/products.html?http://www.alamomotorsports.com/f jo_wideband.html


Also, any of you know anything about the HKS CAMP?

*eurospeed951*

?

Bob S. 1984 Silver

Looks like the kind of stuff for people with way too much time on their hands..

Bob S.

Pffft..I don't NEED no five wire oxygen sensors, baby...

Danno

Looks like a real accurate O2-sensor with more linear outputs than ones optimized for 14.7:1 air-fuel ratios. Kinda pricey though...

Perry 951

WTF!! Some $900 bones for an O2 sensor? Makes that TEC-II price seam reasonable!

RPG951S

I think this is one of those Lambda O2 type sensors, super acurate, super fast, and perfect for on-the-dyno tuning.
Last time I checked, the Lambda version was around $2K, so $900 is 'glup' pretty reasonable.

Watching an actual Lambda display, side-by-side with a stock O2 sensor/aftermarket A/F monitor is a eye-opening experience.
The regualar O2 basically tells you after-the-fact.... kinda like...BTW-- You just ran too lean.. too bad

Think of it this way... Imagine if you will an advanced standalone EFI system with this type of O2 and maybe an EGT (Exhaust Gas Temp), with reactive timing/fuel control...you could theoretically stay 'closed-loop' even at full throttle, with the computer constantly adjusting timing and fuel to maximize horsepower by reading the outputs of the realtime O2/EGT sensors, with pretty much total reliability. No more guessing and readjusting, tell it how 'close' you want to run to the ragged edge, and it keeps you there the WHOLE time. Pretty damn awesome!

Raagi
1988 951S

bs

i've always thought that "wideband O2 sensor" was somewhat of a misnomer. I think what they mean is "wide dynamic range O2 sensor". look at the response curves given on their web page for standard 02 sensor versus theirs... then think back to calc 1 and imagine the first derivative of said curves. For the standard oxygen sensor, you get VERY little variation in output voltage per variation in a/f ratio up until right before stoicheometric, when you start to get huge variation, ie the device becomes very sensitive. but once you are richer than stoich it's back down to voltage changes that probably just get lost in the noise of your engine bay. However, their "wideband" sensor is relatively linear in response over a wide range of oxygen concentrations. meaning, a change from 10:1 to 10.2:1 will give you a similar change in output voltage to that experienced during a change from 14.7 to 14.9

ok so that's way more than anyone cared about, but to me "wideband" means broad FREQUENCY response not broad input range response. but someone here mentioned this sensor is faster to respond which would make it more wideband, but i didn't see that advertised in the linked page.

oh, and while we are on the subject, can anyone explain to me how o2 sensors work? this is one of the few areas where my bosch automotive handbook (aka the blue bible) has let me down.

Ben, back to worrying about bandwidth and getting paid for it