Zeitronix AFR , ect tool...user feedback please

[911 tweaks]

has anyone used any of their devices as either an in-car install for afr, temps, pressures, ect monitoring or as a tuning tool for 911's...?? any and all comments welcome...thx

[moneymanager]

Have one in my 911. Installation was easy though getting the tach to work again took some tweaking. I don't use a meter as I find that the numbers bounce around so much as to be meaningless. So far as I can tell, they all do this. Instead I make test runs, record the data then analyze it at home. Checking your AFR's is not something you need to look at every 20 minutes in ordinary use so it works fine.
The software is fairly primitive but does do the job. It runs only on a PC, not a Mac, which required me to borrow a laptop from a friend to use it. You also need to set the software to average 7-10 data points to smooth the curves enough to be useful. If you don't you go nuts wondering why your AFR is bouncing all over the place.
Bottom line, I learned that my accelerator pump (car has carbs) wasn't delivering nearly enough gas. This explained a big bog when I quickly get on the gas. I also learned that I could get more power with a bigger main jet. So for $500 I probably got $2000 worth of dyno time. And I will use it again in the future.
Overall, fine product. The recording arrangement is particularly well done. Doing it again, I'd look more carefully at the software.

[911 tweaks]

thx mm...good info...I'll check it out further...which model do you have installed in the car & any pics of it = rectangle or round dial shaped unit...?? Bob

[moneymanager]

Zt2, small box behind radio delete panel. No gauge.

[dicklague]

I way prefer the Daytona-Sensors WEGO IV sold by our sponsors here.

I have had one intalled in my 1973 MFI 2.7 for a few years. It is a very well built unit that is all in one. Data gathering and digital readout as well as USB port for downloading, and calibration are all on the front panel.

Comes with very good software, and you can hook a MAP sensor to it easily and get RPM, AFR, and MAP which is great for tuining.

I am biased, but I feel this unit is the best value and a very well made reliable and useful instrument.

I has really helped me tame and tune my MFI on my old 1973!!

Here is the single unit:




A double unit with 2 sensors is available as well:





More info at Daytona Sensors LLC - WEGO IV Wide-Band Air/Fuel Ratio Tuning Aid

[911 tweaks]

thx dick L for your input...is the wiring difficult to do...?? where did you mount the single unit in your car...? any pics of the unit mounted...? I like the front of unit plug in ports...

[tirwin]

What year is your car? (I'm on my smartphone so if it's in your sig it doesn't show up.)

The reason I ask is I just went through this process using the PLX AFR gauge on my '83 with CIS. The PLX uses a Bosch wideband O2 sensor and has a narrowband output to feed the ECU. The problem I ran into was the car ran like crap once I installed the PLX setup.

Part of my problem was the PO had disconnected the original O2 sensor and said the mix was set rich to compensate. I believed him. The mix was LEAN and I was making it worse by trying to lean it out even more. If I had the basic mixture correct at the beginning, maybe it would've worked but people far more knowledgable than me advised that I go back to the basic O2 sensor and ditch the PLX setup, which I did. Apparently all narrowband waveforms are not created equal and the ECU did not like what it saw from the PLX.

It is possible that the PLX would've worked once I got the basic mixture correct but I never went back and tried it again.

YMMV

[911 tweaks]

Thx for all of the info here guys...I have an innovative lm2 that i use from car to car as needed for tuning and/or setting up...
This post is inquiring about what people are using and the +/- they are experiencing...
I am researching what is out there to be installed in a 911 where I am able to monitor a 2 sensor set up = 1 o2 sensor in ea heat exchanger for continual monitoring of afr & if capable of informing me of other parameters going on with the engine, that is ok too...

[dicklague]

Originally Posted by 911 tweaks

thx dick L for your input...is the wiring difficult to do...?? where did you mount the single unit in your car...? any pics of the unit mounted...? I like the front of unit plug in ports...

The wiring is very easy. Comes with a cable that goes right to the head unit. For the Porsche 911 you need the 12 ft. extension cable to reach the dash or you can build your own. The Wideband sensor has 5 color coded wires. At the dash you need only ground and +12 VDC. I made an adapter to go where my clock used to be. I have also mounted it in the ashtray spot. Will try to find a photo of the intall and post.

Check out the install instructions on the site mentioned above.

Here is a sample of an AFR chart.

[axl911]

I prefer the Zeitronix. Cheaper and have more functionalities including alarms that you can set up yourself. For example...light up a big light or buzzer if AFR > 14 while on boost > 2psi.

The square display box also record and display peak values, and support a bunch of sensors like boost/vac/temp/etc. Heck, I even hooked up a 993 knock counter up to the Zeitronix to record values.

[dicklague]

Originally Posted by axl911

I prefer the Zeitronix. Cheaper and have more functionalities including alarms that you can set up yourself. For example...light up a big light or buzzer if AFR > 14 while on boost > 2psi.

The square display box also record and display peak values, and support a bunch of sensors like boost/vac/temp/etc. Heck, I even hooked up a 993 knock counter up to the Zeitronix to record values.

Is the Zeitronix really cheaper when you add all the modules to get those features? Looking at the web site makes my head spin trying to figure out what parts I need to set up what I need.