P0234

Does anyone know of a doc/site that compares the various tuning packages and their data sampling rates when logging? Std OBDII rates are super slow, do any systems use any proprietary (and faster) logging protocols?

Mike@DiabloSport

I just checked a few different applications...

Obviously there are a few contributing factors to answer your question...
The more PIDs you log the slower it will likely be, and different PCMs can give up info faster than others.

I went through a log from an 04 F150 in our Dataviewer program and saw an average of 80 samples per second.
Going through a log from an 06 vette (E38) I see 55 samples per second, but there were 20 PIDs logged as opposed to the 8 or so on the f150.

Older Class2 GM PCMs are slower...
Looking at a log from my car (99 Z28) I see about 6 samples per second with 15 PIDs logged.

A few other random examples:
08 Dodge ram 4.7 (NGC4) 23 samples per second.
04 f150 (OAK) 83 samples per second

P0234

Wow, that is a very good rate. Is that something I can expect with the Diablosport recording on my LS3?

0foff667

MPID's/DMA's usually offer a faster logging rate than std SAE pids, like Mike stated you'll see over 40fps for E38's for the most part.


24 Byte Max 48 Byte Max
1-6 Bytes 20 frames/sec 40 frames/sec
7-12 Bytes 10 frames/sec 20 frames/sec
13-24 Bytes 5 frames/sec 10 frames/sec
25-48 Bytes n/a 5 frames/sec


56 Byte Max 56 Byte Max E38/E67 ECM
1-7 Bytes 40 frames/sec 40 frames/sec
8-14 Bytes 20 frames/sec 40 frames/sec
15-28 Bytes 10 frames/sec 40 frames/sec
29-56 Bytes 5 frames/sec 20 frames/sec

Mike@DiabloSport

Yes.

And I was mistaken on the Class2 sample rate...that was a log I took with the Predator itself (not live streamed to the DV software) thus it samples much slower.

P0234

Good stuff, thanks guys.