Justsaymo01

Wondering if anyone has either of these or maybe another type and what there thoughts are on them. I mianly want one because it dosent require having to install a O2 sensor to get afr readings. I've heard there a little slow on recieving data which dosent bother me to much.

Saaboteur

Unfortunately, I've not used either so I can't provide practical experience. But if those products get AFR from the stock O2 sensor, unless it's a wideband sensor, it's not going to be as useful as an actual wideband.

03MBC32

You do need to install a wideband to monitor/log afr.

320 dreamer

i have the full dashdaq with zt-2 wideband. obdII only reads narrowband which wont help you with afr readings regarding tuning. it costs less than 60$ to have a bung welded into the pass. exhaust manifold and insert a wideband O2. the dashdaq makes tuning a breeze and allows you to download all the data into a sim card and email to your tuner.

Lenin

Also, for a less expensive option, check the rest of the Zeitornix products. You can start with Zt-2 Wideband Controller and Datalogging System for $279 and use a laptop for display and to record. And add a DashDaq later.

Justsaymo01

Not to sound stupid but are you'll installing the o2 sensor directly into the manifold or the exhaust pipe below. From what i remember its not much distance between the manifold and the cat but I might be thinking of the drivers side.

320 dreamer

in the exhaust mani just before the cats. look for the oem setup and just ahead of it

Lenin

I would also recommend intstalling it on the driver side because of the potential cyl#6 problem.

Justsaymo01

Hey guys did you have to remove the exhuast pipe or header manifold when having the bung welded on, just trying to figure out the best way to go about it. Should I be concerned about any direct welding done on the car as far the electronics being affected. Pics of your install would be great .

Lenin

I wouldn't recommend to do the welding for this project directly on the car. It is much safer and easier if you first take the parts off. And here are some pictures of my old exhaust setup. The header was tapped for the EGT probe and the downpipe was tapped for the O2 wide band.

Justsaymo01

Thanks so so much for the pictures. I see you mentioned a #6 cyl problem could you explain that.

Lenin

The same issue in the E55 is known as Cyl#8. Basically, if you look at the C32 or the E55 fuel rail, the fuel enters from the back on the driver's side. Because the rail is not circular (fuel does not run in a loop), the most pressure is available at each of the ends (front of the car) since that is where the most resistance is. The least pressure is available at cyl#6 (or #8) which is the last cylinder on the driver side. At WOT, the pressure is gradually dropping as you move further away from the ends and may cause a condition where cyl#6 (and cyl#8) may run lean. And that is not a good thing. That is why if you are only monitoring one side, it is more important to monitor the EGT and AFR on the driver side behind cyl#6. What compounds the issue is that in a 2002 C32 the cams are pressed on vs. being made out of a single piece of metal. If a valve gets bent, it can also push the lobe out of position. If you just fix the valve, the problem comes back since the lobe is off. This is more likely to happen to a more modified cars than stock. Don't want stock guys to be alarmed unnecessarily.

Justsaymo01

Im thinking about going with the Dashdaq/Zeitronix that needswings has its right at $800. It says its a plug and play, my question is if the dashdaq is connected to the obdII, and the wideband sensor is connected to it, will I have slow afr readings? I noticed 320 dreamer that you said you have these two together if you have any input would be great.

320 dreamer

zt-2 for me runs the wideband , boost and fuel pressure along with rpm. they sample independent of the obdII. the zt-2 runs thru the dashdaq for viewing and logging. yes the obdII sample is a bit slo but not bad. the more parameters you run the slower the sample. i keep mine at about 13 parameters

Justsaymo01

With your setup did you have to do any splicing into your ecu wires to be indepentent of the obdII or does it run straight from the wideband o2 sensor to the dashdaq, hence the plug and play that its advertised as. If not and the plug and play methode is relying on the obdII is the responce time well enough to get afr reading to tell a lean condition which is my main objective. I'm just not comfortable splicing into my cars wiring. Thanks so much for your input.

320 dreamer

i did have to splice into some wires. it was nervewracking but rcompart had someexcellent diagrams and was on the fone to help. its really the only way to get away from the obdII

jmb614

I have the dashdaq and zt-2 combo as well. I pull boost, afr, tps, and rpm through the zt2. IAT, timing, ECT, speed and load through OBD. It works very well and has different formats for datalogging.

I placed my wideband on the drivers side because of number 8 cyl. Funny thing is, after looping the fuel rail a few months ago, I pulled the plugs the other day and the back cylinders including number 8 all appeared to be running richer than the rest. My tune is very conservative atm due to the cold weather, which likely has something to do with. Though I am still surprised, I thought for sure the plugs on those cylinders would show leaner than the fronts.

Justsaymo01

Any ideas on where I can find info, or pictures on the pin outs for the more commonly read parameters on a c32. I just ordered the dashdaq xl, zeitronic Zt-2, and have already installed the o2 bung on the drivers side.

Lenin

Here you go. https://mbworld.org/forums/c32-amg-c...d-afr-diy.html

Justsaymo01

Thank's very, very helpful .

Grip Grip

The DashDyno is the most user-unfriendly electronic device I've ever owned. Pair that with the worst user interface you can imagine, and it becomes a huge PITA to use.

The DashDaq on the other hand has proven to be the complete opposite.