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Old Sep 19, 2010 | 12:48 PM
  #101  
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ahhhhhh... ok!!!!! That makes sense...

How do I change the COBB to AFR vs Lamda? I did not know you can do that?

Thanks man. :-)
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Old Sep 19, 2010 | 12:50 PM
  #102  
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From: PCB
Under one of the options windows... I don't have it in front of me to tell you excatly, but it's easy to find if you go through the options at the top of the menu.
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Old Sep 19, 2010 | 12:59 PM
  #103  
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"Use Standard Units"... :-)

Thamks buddy....

That makes things alllllot easier....

Ok... I will be back... :-)
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Old Sep 19, 2010 | 01:04 PM
  #104  
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I think this thread is moving to "Scale the MAF" really quick.
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Old Sep 19, 2010 | 01:05 PM
  #105  
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Originally Posted by Nemesis8
I think this thread is moving to "Scale the MAF" really quick.
As the title says, this is a repository for Cobb data logs, charts, comparisons and discussion.
How else are you going to get your datalogs, charts and discussions.... LOL
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Old Sep 19, 2010 | 01:06 PM
  #106  
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I agree that it is moving away for the original topic but at the same time It's not a bad thing.
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Old Sep 19, 2010 | 01:19 PM
  #107  
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Just the logs people
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Old Sep 19, 2010 | 02:13 PM
  #108  
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How does this look? Better I think...

Added a pic of my new MAF curve in AP.


:-)

Last edited by chonniedotcom; Apr 27, 2013 at 12:10 AM.
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Old Sep 19, 2010 | 02:30 PM
  #109  
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Well, it is one of my favorite threads!

Here is my untuned warm idle log...

I have not really had time to do anything to my car lately. I bumped my idle up a bit to compensate for the porting. I really need to get going on my tune. I started an e-tune session with Jeff, but this car needs a dyno tune. Waiting to hear back from Surgeline in Portland.
Attached Files
File Type: zip
Warm Idle.zip (3.1 KB, 53 views)

Last edited by Nemesis8; Sep 19, 2010 at 02:32 PM.
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Old Sep 19, 2010 | 03:58 PM
  #110  
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Originally Posted by Kane
How else are you going to get your datalogs, charts and discussions.... LOL

Yep!!! :-)
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Old Sep 19, 2010 | 04:02 PM
  #111  
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Originally Posted by Nemesis8
Well, it is one of my favorite threads!

Here is my untuned warm idle log...

I have not really had time to do anything to my car lately. I bumped my idle up a bit to compensate for the porting. I really need to get going on my tune. I started an e-tune session with Jeff, but this car needs a dyno tune. Waiting to hear back from Surgeline in Portland.
When I tried to move my Idle up to around 1000 rpm... nothing appears to happen.

I even bumped it up to 1200 for a bit to see if it makes a difference, it did not.

Adjusted in all 3 map area's as well.
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Old Sep 19, 2010 | 05:18 PM
  #112  
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Here are a couple of mine from earlier today .... you can see more discussion at https://www.rx8club.com/series-i-engine-tuning-forum-63/stinksause-attempts-tunning-201668/

most of em are WOT .... but have some cruising sections to them

you can also see than my LTFT changed over the course of the day ... my car has not finished setting them
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File Type: zip
Miata Cruise.zip (18.7 KB, 59 views)
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Old Sep 19, 2010 | 05:38 PM
  #113  
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Originally Posted by chonniedotcom
When I tried to move my Idle up to around 1000 rpm... nothing appears to happen.

I even bumped it up to 1200 for a bit to see if it makes a difference, it did not.

Adjusted in all 3 map area's as well.
Did you click "save map" ?
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Old Sep 19, 2010 | 05:51 PM
  #114  
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Originally Posted by Kane
For MAF Scaling, long 3-4th gear pulls on flat ground are best (cruise control)...

As for what to log:

Time
Coolant Temp. (° F) - optional for most things
Equiv. Ratio (AFR)
RPM (RPM)
Calculated Load (%)
Long Term FT (%) - get STFT too, helps to see open loop
Mass Airflow (g/s)
MAF Volts
Throttle Position (%)
Ign. Tim. Lead. Coil (°)
Ign. Separation (°)

The rest of this list looks fine.

And set the Air/Fuel 3-4 Gear Map to all 14.7? As the long slow part, log from 0.00 calculated load all the way to 1.25 calculated load?

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Old Sep 19, 2010 | 08:33 PM
  #115  
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Originally Posted by Nemesis8
Did you click "save map" ?
Ha... ya.. I did... ya.. it's wierd. Does not make any differance.
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Old Sep 20, 2010 | 12:20 AM
  #116  
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Originally Posted by Nemesis8
And set the Air/Fuel 3-4 Gear Map to all 14.7? As the long slow part, log from 0.00 calculated load all the way to 1.25 calculated load?

Huh? NO way - never set the whole map to 14.7

I think you guys are confusing the "old school" way using excel and the Baseline way.

You ONLY set your cruising areas to 14.7 (lambda 1) for the maf scaling if you are using excel style... Baseline you just make sure your target AFR map and your AP Gear map are the same.

No matter what - you never WOT at 14.7.... this is bad juju
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Old Sep 20, 2010 | 12:22 AM
  #117  
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Good popcorn when you are boostin eh Kane ?
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Old Sep 20, 2010 | 07:59 AM
  #118  
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That's why I posted that - did not want people getting confused here. As for me? I'll be sitting on a dyno doing this.
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Old Sep 20, 2010 | 08:34 AM
  #119  
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How do you filter bad data from the log? I remove all data with AFR above 16.5 (fuel cutoffs). Doing this drops the correction from 9-10% to +/- 1% on all logs in one driving cycle. Anything else? Should I shift AFR to compensate for sensor latency and get more accurate correction?
Here is a log. WOT pull in 2nd gear at 423s.
Attached Files
File Type: zip
datalog3.zip (30.4 KB, 48 views)

Last edited by SC-ed; Sep 20, 2010 at 09:58 AM.
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Old Sep 20, 2010 | 10:08 AM
  #120  
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Originally Posted by chonniedotcom
When I tried to move my Idle up to around 1000 rpm... nothing appears to happen.

I even bumped it up to 1200 for a bit to see if it makes a difference, it did not.

Adjusted in all 3 map area's as well.
The idle control maps don't work in the "RACE" version of the software for the 4-speed, 4-port auto cars.
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Old Sep 20, 2010 | 10:24 AM
  #121  
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SC-ed,

From time 431.58 through 443.77 you are off throttle right? Man you are getting to 8900 RPMS and 284.44 in airflow. I want FI. I am still a noob but everything looks good to me.
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Old Sep 20, 2010 | 11:46 AM
  #122  
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Originally Posted by SC-ed
How do you filter bad data from the log? I remove all data with AFR above 16.5 (fuel cutoffs). Doing this drops the correction from 9-10% to +/- 1% on all logs in one driving cycle. Anything else? Should I shift AFR to compensate for sensor latency and get more accurate correction?
Here is a log. WOT pull in 2nd gear at 423s.
Um, I lost track are you doing this by hand? If so then you wanna scrub the off throttle stuff and before you do that you should look at your AFR latency...

But hey - 1% is damn good.
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Old Sep 20, 2010 | 12:30 PM
  #123  
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Originally Posted by 9krpmrx8
SC-ed,

From time 431.58 through 443.77 you are off throttle right? Man you are getting to 8900 RPMS and 284.44 in airflow. I want FI. I am still a noob but everything looks good to me.
Yes, TP 2-8%, fuel cutoff. BNR with EBC off at 6.5 PSI.

Originally Posted by Kane
Um, I lost track are you doing this by hand? If so then you wanna scrub the off throttle stuff and before you do that you should look at your AFR latency...

But hey - 1% is damn good.
I'm still waiting for you to fix my Baseline file. No problem...
Anyway if I shift the AFR I'm getting ridiculous AFR's of 15-17s at WOT in 8XXX RPM. I don't fill it in the car. So I don't shift.
Here is the WOT portion of the log, no AFR shifting.
Attached Thumbnails Cobb Datalogs-wot.jpg  
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Old Sep 20, 2010 | 12:39 PM
  #124  
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Oh yeah, my bad. I keep getting stuck working weekends....

I'll try to look at it later this week.
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Old Sep 20, 2010 | 12:47 PM
  #125  
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Don't worry. I'm learning more this way.
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