PLX wideband o2

[Martin in Bellevue]

http://www.plxdevices.com/onlinestore_domestic.htm

http://www.plxdevices.com/M-Series-C..._M-300Demo.wmv



I kinda like the m series gauge, but it doesn't look to supply an analog signal for the dme, in lieu of the stock narrow band sensor.

Anyone familiar with these wideband sensors, or suggest a better one?

[Robin-535im]

How much is the WBO2 by itself? Maybe you can get one for some generic application and wire it up to a set of LED's ... I have a link for a $14 LED display for O2 sensors:

http://www.autospeed.com/cgi-bin/bro...add=888800044&

The numeric display is nice but $500 sounds like alot. I could get my hood repainted for that!

[Martin in Bellevue]

I've got the split second 'arm1' exhaust gas gauge now. It is limited to tuning for oscillations, as it were. Trips to the dyno wouldn't be eliminated, as they would be with a wideband o2 sensor.

Jeff's been asking about going in on a $400 wideband logging unit. He loves to crank the maf controller pots way over.

[Robin-535im]

The MAF - does it also have an inlet air temp sensor? I read something about a vane type sensing volume and using air temp to calculate mass, whereas a MAF uses the hot wire to measure mass flow directly. But if the ECU needs the inlet air temp for something else (like timing or mixture adjustments) then your MAF's "estimated" temperature might not be good enough.

I would really like to get a WBO2 and bung it in before the cat, even if it wasn't logged electronically. In fact, I'd consider using it to tune my old 72 Chevy too, just install it, set the carb jets, and then pull it off and plug the bung with a bolt or something.

[Martin in Bellevue]

It is wired simply in resistance for the dme. The maf controller does not interact with or modify the intake temperature signal.

[emw525E34]

Martin,

True that the MAF does not change or touch the intake temp signal. This signal is used to select the AF mixture map in the DME. Now would the voltage range of this WB sensor correspond to the normal Bosch OEM sensor ? For direct replacement.
Getting the voltage figure is kinda nice.
I am reading the current O2 sensor wire doing to the DMW via a tap using Apexi SAFC (the IN2 input), it measures accurate to 0.1 volts. I did a DWM comparison. My SAFC controls the 535AFM I got from Bruno almost 3 years ago. It powers my M20 motor.

I have "chip tuning" like control over the mixture for every 1K rpm range on the tach. It is nice to dial-up the torque within a range like from 3-4K rpm. I do slightly rich towards 6500 rpm. It can make a huge mpg saving depending on my driving needs. I am happy.

[winfred]

http://www.innovatemotorsports.com/products/lm1.php

[Jeff N.]

I think the Innovate unit is better...has logging ability. Don't think this one logs.

[Robin-535im]

I think the Innovate unit is better...has logging ability. Don't think this one logs.

The RPM logging (+ inlet air temp, MAF, ...) could be really cool...

[Jeff N.]

RPM, maf voltage and Lamda. If you can log that, then you can really see what's going on.

THEN..if you wanted to really go for it, I think you plop in a Split Second PSC1-04 and tune with that. You'd get control of over air/fuel at all RPM and load ranges. Still no timing control but you'd be pretty close! Martin's hot on this box and I agree it looks pretty sweet. Should front end my proflow MAF.

Just need about $700 or $800 for misc electronic gizmos!

Jeff