I have heard that some people have successfully connected a WideBand O2 to the Tec 2 by remapping the O2 settings.

I have heard that too. Did it myself with a TEC-II and and Innovate WB kit, works great.

How did you remap the chart to match the WideBand 02 sensor? What values did you use?

Thanks,
Don

Tec2 has a 1 to 0 V input. So set the wideband output to produce 1V at A/F of 10 and 0V output at A/F of 19.

Tec2 table is then set to:
A/F EGO Volts (Input form WB)
19.0 0
18.0 0.56
17.0 1.11
16.0 1.67
15.0 2.22
14.0 2.78
13.0 3.33
12.0 3.89
11.0 4.44
10.0 5.0

This is the theoretical. I had to bias my voltage in the Tec table to get the Tec observed actual A/F to read the same as the wideband outpug gauge.

Also keep in mind you still only get NB funtionality from the TEC.

Will using a wideband with the Tec 2 still give you faster AFR responses and more accurate readings?

Are you using the LC-1 or the LM-1? Are you runing them together with the Tec 2 to compare the results?

LC-1 and XD-16 kit.

The TEC-2 was not designed for WB so even though the LC-1 can be programmed to communicate with the TEC it will do so as a NB device. Meaning it is good for only near stoich control.

Let's back up for a second... what is it you are trying to accomplish by integrating a WB with your TEC?

Let's start with my assumption. That a Wideband is much more responsive and is more accurate than a Narrowband and is a better tool for tuning with. So I assumed that hooking a Wideband up to the Tec 2 would allow me to be able to read and tune it more accuratly than with a Narrowband but it soulnds like you are saying the Tec 2 circuitry is not able to accomplish that. So the only thing that I would gain is not having to have two different O2 sensors. I assume you can run the LC-1 and the XD-16 with it simulataneously hooked to the Tec 2.

You are correct about the responsiveness, the LC-1 has to be slowed down for the TEC. NB is accurate, however, a WB is accurate over a wider range.

Lastly, yes, the nice thing IMO about the Innovate product is you can have one sensor act as both a NB for the TEC and a WB for the driver.

In my application (forced induction), I do rely on feedback (closed loop) from the LC-1 to manage the TEC but only at idle. All other parts of the map are open loop. This has worked very well for me.

I have heard that the WB is accurate over a wider range but what does that mean? Where did you get your Innovate LC-1 and XD-16 kit from?

A NB sensor cannot read accurately much below or above stoich where a WB can read AFR's from about 9 to 20.9 (plain old air).

eBay for $299 but got a $50 visa gift card so... $249. That was 1.5 years ago.

IMO, the XD-16 gauge is nice but were I to do it again I would get the small square LED gauge Innovate offers. I find myself reading the AFR readout in the center of the gauge and not looking at the simulated needle. The smaller square guage would make for a smaller neater install in my application, but then again I obsess!

http://cgi.ebay.com/ebaymotors/Innovate-LM-1-LC-1-Wideband-Display-ONLY-Blue-Square_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em14QQhashZitem4ceb3b5e01QQitemZ330364050945QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Just a note, the sensor is Bosch from a modern VW bug... ~35 at the local auto parts store.

Just to be clear, if you want to use the LC-1 as an input to the TEC2 to allow more accurate datalogging and tuning then this will work fine. The only thing special about the TEC2's EGO input circuitry is that is has a x5 amplifier inline before the A/D converter. This was done to make better use of the TEC2's available 0-5V A/D input resolution, given the 0-1V range of a narrowband EGO sensor.

The shape of the response curve defaults to that of a narrowband, but the capability to change this has been there since WinTEC1 (FWIW, earlier firmware versions had the capability too, it was simply never exposed in the software). You can make the response curve linear over whatever range you chose, given a max AFR of 29.28 and a min of 10 - it assumes gasoline (stoich = 14.64) as a fuel.

You can accomplish this in two ways - the easiest being to connect the LC-1 analog output directly to the EGO input, and setting its output to be linearized over the range of 0 to 1V. The drawback to this is that you are only using a fifth of the available range of the LC-1's D/A converter, so your resolution will be 5 times coarser than it would normally be. Actually, this isn't as bad as it sounds - as I recall the LC-1 uses a 10-bit D/A, giving it 4 times better resolution than the TEC2's input A/D. So, the loss in resolution from doing this is minimal (~20% loss in resolution).

If you wish to use all of the available resolution of the LC-1 you can put a divide by 5 resistive network (two resistors - Google "voltage divider") inline with the LC-1 output and use the full 0 to 5V range when setting up the LC-1.

This will give you accurate linear response over a max range of 10 to 29.29 AFR (gasoline). For datalogging and tuning this will be far better than using a Narrowband, as dswalterwi assumed.

You do still get the same crappy EGO feedback system, but it should still work a bit better with the WB. Also as 4SFED4 noted, don't use the EGO feedback for WOT, just cruise and idle.

As far as response time goes, the TEC2 samples at 20Hz, so you will want to limit the bandwidth of the LC-1 to half that or less (Google "Nyquist"). Personally, I don't see this as an issue, as you aren't going to be able to tune out any AFR fluctuations that are happening faster than 10Hz anyway, no matter what controller you are using.