Hi all,

 

I've got Torque (https://play.google.com/store/apps/details?id=org.prowl.torque) logging a few things via OBD. Here's a graph it's created for Air/fuel ratio commanded vs measured with boost.

 

An interesting one here is that the engine has done 85k and has a bit of a wobble on tickover likely due to the crapped up intake manifold. I think this is shown in commanded AFR against measured AFR. Commanded is quite stable (blue), but red is a bit wobbly..

 

RPM is on the primary axis, everything else on secondary.

 

 

Anyone else got any?

Wow that's hard to read!

I usually log with vcds and excel.

Have you clicked the image to make it bigger? This is in excel too I've just used a bluetooth OBD and Torque app to log stuff. Fair bit cheaper than VAG-COM and a cable

I was meaning something like this, although I've forgotten how to put the rpm at the bottom.