Hi guys...I wanted to create this thread to have a reference for what parameters to log with either the Duramteric or Cobb to assess a healthy engine. What specific settings should be used? What results are within range to be considered good/bad etc. Would love to hear from the board sponsors if possible. I am going down the road of upgrading parts and before I do anything I want to make sure everything is running well. I have a Duramteric but will also have a Cobb in a few weeks.

-Ralph

 

Hi Ralph, The access port has default log parameters which make everything pretty easy. Is your car totally stock now? Are you working with someone? Feel free to email for any help. Do you have a specific list of upgrades you have planned?

Log:

RPM
Ignition Angle
Intake Air Temp
Knock Sums On Cyl 1-6
Lambda Both Banks
MAF Both
MAP
Short and Long Term Fuel Trims
Throttle Angle

 

Hi Ralph,
Both can log but the best way of logging the factory ECU today is via the Cobb Accessport. Defaults are usually good to start with. On the 997.1 Turbos the additional parameters we typically have customers add are Ignition Timing Actual and Nominal Throttle Plate Angle along with the defaults.

Here's a link to some instructions on datalogging:

http://www.cobbtuning.com/support/v3-data-logging/

Here's a PDF to the full list of monitors available via various Cobb APs:

https://cobb.app.box.com/porsche-tuner-monitors

Let me know if any questions at all.

Dzenno@PTF

 

Thanks for the replies gentlemen. To all the AP users out there...which gauges do you guys have up on the AP while driving? Anything we should monitor real time to "know" a healthy running engine. My car is bone stock....but going under the knife soon. I just want to make sure I have a healthy starting point.

 

You have 6 different gauge layouts to choose from. I typically use the 6 gauge layout and a 5 gauge layout.

On the 6 gauge layout I typically set to show Knock Sums on cylinders 1 through 6. This will let you monitor knock and its nice to glance over while you're at WOT. Depending on octane some knock sums especially with an OTS map will happen. If you're seeing higher than -6 here, especially while at high load/WOT, your current map should be reviewed by a tuner and updated or you should switch to a lower octane map.

On the 5 gauge layout you can add Intake Air Temp, Lambda Bank 1 and 2, Short Term Fuel Trim Bank 1 and Bank 2. Outside of monitoring your Lambda, monitoring Short Term Fuel trim values you can spot an issue for instance with an FPR line coming off. In a nutshell, the values here represent how much overtime the DME is working to get your fueling to stay where the map is asking it to stay. Values below 1 indicate the DME is compensating for richer than asked for lambda so its taking fuel out as it senses overfueling. Values higher than 1 indicates the DME is compensating for leaner than asked for lambda so its adding fuel to correct Lambda back to target. With an FPR line off you'll see these values max out above 1 and flatline at a threshold/max value that is set in the map. With OTS maps this is set at 1.20 or 1.25 I believe. You want to ideally be within 0.9-1.1 here.

Let me know if any other questions at all.

Dzenno@PTF

 

Dzenno/Sambo,






Thanks for the advice so far. I did a lengthy log on the way home tonight. It may have sucked as there was traffic most of the way. The first 10minutes or so were without the sport button pressed.


https://www.dropbox.com/s/y1opsr2bl5...alog4.csv?dl=0


In your opinion...anything look out of wack? If I read your notes above correctly...then I am safe to assume that my FPR vacuum line is correctly attached at the moment.

 

Best is to upload your csv file over to datazap.me. Its a free service and provides charts to review data.

Your log looks great at idle/cruise. Let's get a 3rd gear WOT log captured and uploaded to datazap.me and we can review.

Dzenno@PTF

 

Wow...what an awesome website.


I'll make that last 3rd gear WOT log soon.




Thanks for the help thus far guys.

 

Did I do this right?

http://www.datazap.me/u/turboslut/se...olo=1-12-24-33

 

Which monitor is injector duty cycle?

 

From my understanding you have to calculate it..

IDC = Injection time(ms) from you log * RPM / 1200

I just load my logs into Excel and create a formula and save it back before importing into datazap. Probably other ways to do it..

I'm not as familiar with the Cobb logs.. I see Actual Gear, thats pretty interesting, I suppose this is calculated based on RPM & speed?

There's some timing retard in your log at almost 10Deg.. are you running 93 or 91 Octane? You're currently stock, yes?

 

I am running 93 octane on Cobb stage 1 OTS tune. Car is fully stock.


Is 10deg bad?

Thanks for the formula...created column in excel.

 

Not sure how I feel about these OTS maps

http://www.datazap.me/u/turboslut/quick-run

 

What could cause false knock events in a car?