TechEdge WB w/ Microtech Datalog is worthless
 

Since I have a techedge wideband, there is an option for a 0-1volt output to make it act like a normal O2 sensor for your linear input (Microtech). I hooked it up, calibrated it on the dot, and for some reason it would only read 10.6 when my ratio was in the 12s. Odd, maybe I didn't do something right? Well, I noticed that it will jump to 14.7 but right back down to 10.6. After discussing it with someone that tried the same thing, we realized that this is just a bad design, and that the linear output is worthless.

So I'm tuning on the fly now, just gotta be fast with the fingers.

If anyone was planning on doing this, I hope this helps change your mind for relying on it.:(

Sad...you have a display for the WB right?

Yea,

I noticed the same thing. It sucks.

Daniel

Yeah, I have the display. So I can see what's going on and have me myself and I tune it, or a friend in the other seat.

Is the problem with the WB or the MicroTech?

The WB output.

Brandon
BR7 Racing

Yes, the OUTPUT from the wideband is the culpret, not the INPUT of the Microtech. The Microtech uses a 1v sensor, and the Wideband has a 1v simulated output. But the output would only either read 0 volts, .5 volts, or 1 volt. The Microtech doesn't care if there is a wideband output or normal sensor there.

Alright. I'll admit that originally I didn't know what a TechEdge was but now I've been linked to it and I had a thought.

If a Microtech can use a 0-5v input signal (a la wideband) why use the linear 0-1v output of the TechEdge? From what I can tell on the techedge site, it's got a 0-5v output signal as well as a narrowband signal.

...or did I misread that? Can a MicroTech use a 0-5v signal?

Yes, you misread that, I wouldn't have bought the tech edge hardware if the sensor went right in.

The L1H1 sensor has 5 or 6 wires, and a heater for it. That's why the circuitry is so expensive.


If you read the thread, I'm saying the 1v output sucks bad. You can use it if you want, it won't give you any good data. You can be at 14:1 AFR or 10:1 AFR and it will still say 10:1 AFR for both.

*edit* I'm talking about the LT-8 btw, not the LT-12. The LT-12 can use a wideband sensor.

i read the thread, and I realized that the 1v output sucks. I just wasn't sure if the MT could use a Wideband.

Thanks.

techedge 2.0

So you can't use a wideband period on a LT-8? How is effective dyno tuning going to work then? Or am I missing something.

-Marc

Most dyno's are equiped with WB sensors you can use.

Nothing can prevent you from using a external wideband O2 (such as my Techedge 1.5), it just will not interface directly with the LT-8 as it will with the LT-12.

Daniel

IE the simulated 1v range output from the techedge isn't correct. However if the 1v simulated was correct in function, it'd work great with the logs.

Anybody know if they addressed this issue with the 2.0?

The AEM wideband might work
check it out

Hurray, someone UNDERSTANDS! :)

I actually don't know, but I'm about to pitch a bitch at them for advertising it and having it be worthless.

Worth a shot...they might have even released a firmware update for it...

I didn't find a tech support forum for it...

This is just a thought.... you can make a simple circuit which lowers the 0-5v output of the wideband to output 0-1v. You can probably do it with just a few resisters. Might I also suggest a maximum voltage clamp of 1v, just in case.

Would that void any warrantee?

Of corse calibration may be thrown way off, but if you come up with some sort of chart where the WB display is at one point, and the MT is at another, you can easily cross over the values. All you really want is datalogging of any kind with some way of acurate a/f values.

Dont do anything that I've said in the post above. Its all wrong.

It's ok, I don't know enough about that stuff anyway.

I've talked to some people, and it seems there IS confusion still.

Well, this happened with version 1.5. Maybe 2 is different? If someone knows something on how to get this working, they should post...

theres homemade datalogging capabilities with the laptop. Take a look at this.

http://www.dataq.com/products/startkit/di194rs.htm

only 25 bux for data aquisition loging for up to 4 chanels. hell if you are really good, you can log A/F, Boost, rpm, and anything else that is just straight voltage +-10vdc up to 240 samples per second.

One problem I can see is the need for 2 serial ports if you want to use the mt at the same time.

How do you like your techedge overall besides it not being happy communicating with the microtech?

After talking to someone over the weekend he said he used an output from the display to his datalogit. I'm going to look into that and try it.

Otherwise, it is awsome. I don't have to worry about leaning out, I know how my car is running a lot better than most, and I can mess with maps if I want anytime. The 2.0 version is way cheaper, too. I wish I would have waited :) But it is great. Very useful.

I've leaned out my cruise to 14.3-8 with it sometimes going in the low 15s because of temp changes with the engine and air and it still runs great. I am shooting for 260+ miles of highway driving at 81 mph.