Menu toggle

Data logging

P

PorkyDunc

New member
Now this is just an idea but can you access the ecu while driving for data logging purposes? I know about the augtronic but that seems a little rich for me and the rogue tuning site mentions it, I'm not to sure if it can be used without their chip and anyway when I asked a question a while ago about their options I never got a reply so don't feel like giving my hard earned to them! I have looked at the moates systems but again I would like to know if that could be attached to our boards....... Loads of questions I know but I just love knowing what my cars are doing [&:]
Anyway if anyone could fill in the blanks it would be great!

Duncan.
 
I am sure it is possible but likely nothing like as easy as on more modern cars with handy OBDII connections. I believe you could sample the TPS and the revs off of the coil without having to go near the ECU, brakes would just be a switch though.
 
Hi Duncan,

It's difficult to access the ecu without something specialist in the way of clipboards or emulators.

However, you datalog pretty much all of the sensors that connect to and from it.

I built a datalogger using an Arduino processor and can log TPS, speed, revs, gear, knock, boost, AFR, temperature etc.

Anything that outputs a voltage signal can be logged if you can connect it to simple processor, but logging what is actually going on in the ecu is another matter.

 
Not sure if this is of any interest?

http://forums.tipec.net/viewtopic.php?f=25&t=14082

I know nothing about it btw!
 
You can certainly monitor the external signals around DME, both the inputs and outputs. It just depends how complex a system you want to install. To do this you need to cut into wiring looms, fit new sensors etc etc. If you can communicate with the DME then you can just get it to output the information you need to a laptop or logger.

Products made by people like Zeitronix have a piggyback type approach where you wire into existing sensors etc. Products that modify the DME itself can get the data directly from the processor in the DME and typically this means you have access to more parameters such as internal calculations of the DME that you can't see externally.

Other considerations are wether you can live view the data, what format it is recorded in, sampling frequency, accuracy etc etc. What do you want to use the data for Duncan are you tuning, fault finding or just interested?
 
Just really want to look into it, see whats happening, learn what it all meens then maybe look into tuning... Well slightly fidling around to be honest. I dont know really, I just like to know how things work and how to work them[;)]
 
You can certainly intercept the censors feeding the ECU as that is what any of the piggy back MAP and MAF kits do; so RPM and TPS are readily available.

I seem to recall there was also a piggy back chip floating around some years ago which would potentially give you greater insight into the board.

Noting all of the above any information gained is likely to be compromised by the age of any sensors and the state of the wiring so reliable data would be better sought with new components.
 
The sensors don't drift too badly. I will upload some logs from the DME in my 944 turbo (not properly tuned yet), these can be viewed with megalogviewer as the output is just CSV. You can see everything from manifold pressure to position sensor errors, engine rotations, air temperature compensation, air fuel ration, ignition advance etc etc. I have found learning about and implementing an ECU very fascinating and insightful. Theres lots of information out on the web about it. If you want to look at code there is megasquirt but I never bothered as its all done in assembler.
 
Viewing software:

http://www.tunerstudio.com/index.php/megalogviewer

Log of my first run in my 944 turbo:

http://www.augmentautomotive.co.uk/files/944%20Turbo%20%28Un-Tuned%29%2030.10.2012.csv?attredirects=0&d=1
 
You must log in or register to reply here.

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Back
Top