when data logging during driving, does the OBD II cable get on the way when engaging the clutch? should i drive the car normally or go WOT/ and for how long?

 

for tuning purpose start the dataloging and then go from 2000 rpm to WOT then back down again then hit stop on the datalog save the file, turn off the Durrametric and restart it to do another run.

 

or you can start it, and run it the entire time you are driving without stopping it. Then you export the file to excel, and cut it down to the runs only, that way it is all on one file. That is how I do it. I keep the parameters to about 8-10 and I get about 2.5-3 samples per second. I have heard that with a well optimized laptop, you can get up to 5 samples per second.

 

yes it is for tunning purpose, but Isn't one run enough if i go WOT on second and third and maybe half through fourth?

 

the higher the gear you do WOT, the better. More load. I would do short shift in 2,3 and wot through 4th.

 

For tunning purposes what info do i need to tick on other than AFR?

 

I have done durametric logs in 2 ways,

1. starting in 2nd at 2000rpm then WOT, shift and the same through 4th. This wont give as much load information as prche951 mentioned.

2. My tuner prefers this method.....start at 2000rpm in 4th and WOT to redline. I usually coast a mile or so to cool the IC's, I don't advise in immediately stopping after a WOT run as this can heat soak your IC' and turbos after a bunch of runs.

I usually do 4-6 runs, this will give the tuner a very good idea what is going on.

I also have had better results with having power connected to the laptop when datalogging, I'd imagine it gives more samples per second, Im sure this can be manually configured as well.

Off the top of my head you will need both lambdas, injector duty cycle, IAT, boost pressure and ????....I'll edit this when I get home tonight.

 

This is what I've been told to log...hope it helps.

1500 to redline.
3rd or 4th gear

Log

Engine speed (rpm)
Engine load
Ignition angle
Oxygen sensing bank 1
Adaption range 1
Adaption range 2
Oxygen sensing bank 1 actual lambda value
Actual boost

 

Thanks, i will be waiting for the additional info.