Cobb AccessPORT Discussion
yeah, me likey..... remember the talk about intentionally going pig rich at a certain point to achieve this.... well, before long i wont have to worry about that anymore.... BOV - atmosphere 
thats cool, cant really get too far off % wise anyway with common wheel/tire combo's
thats cool, cant really get too far off % wise anyway with common wheel/tire combo's
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Joined: May 2008
Posts: 635
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From: Norway
Btw, if I choose to take the cat off, will your map "burn" something like the RP midpipe as well? Because if I replace the cat I need something that isn't too loud. I'd probably have to put cat back on for technical checkup every other year, so I don't know if emissions matters THAT much for me. But noise does. And smell, but I understood it shouldn't be too bad since the AP map is leaner.
(I've searched and read about midpipes but frankly there's a lot of either full on praising, or they just don't have the same needs as me. I don't want it sounding like a racecar, just aggressive
)
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Joined: Jan 2007
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From: everywherez...
I cant stand poor unsynchronized systems using assumed data...
My speedo is about 3mph off. When it reads 75, my GPS reads 72. Makes me feel better in a way though... cause I'll set the cruise at 75 in a 65 or 80 in a 70 ... that 3 mph variance helps quite a bit come cop time.
And to further our OTness, the last time I passed one of those "your speed is" things, it agreed with my GPS.
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Joined: Jan 2007
Posts: 2,756
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From: everywherez...
Just got home after remod "breakin"...after flashing to the correct trim...swapping out the parts...doing a quick brake job (hawk ceramics)...
From Austin to SA (thru rush hours) and back...according to the AP...24.1 MPG
Stuff that into your pipe and smoke it...heh
From Austin to SA (thru rush hours) and back...according to the AP...24.1 MPG
Stuff that into your pipe and smoke it...heh
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Joined: Jun 2005
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From: Dayton, Ohio
Would any one be willing to help me with creating a good graph with excel from my log, so I can send it to MM? I haven't had much time and the time I have spent, it just doesn't seem like it comes out right.
Being (new) single rocks!
Joined: Mar 2008
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From: Toronto, Ontario, Canada
I could use help with this as well. Is Excel the desired format? I use EFI Dude, how about you?
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Joined: Jun 2005
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From: Dayton, Ohio
Yeah, I think MM and others prefer an excel graph. I've tried but can't seem to get the graph to do what I want it to. Yup I use the same. Works good I think. It outputs an excel data chart but you have to create the graph.
1. Export to CSV. If you do not Reset/Delete VIN from your EFIDude periodically this file will grow quite large over time. You'll always find your most recent session at the end of the file.
2. Open Excel and Import/Open the CSV file into a workbook.
3. Create a new Sheet (New-->Worksheet) or use one of the extras (Excel typically creates 3 worksheets for a new workbook) - you can find them in the tabs at the bottom of Excel named "Sheet 1", "Sheet 2", etc.
4. Select all of Row 1 in the CSV sheet and paste it into your new sheet's Row 1. This brings over all the column headers.
5. Locate the row in the CSV sheet that you want to copy from and select it and all rows underneath. Keyboard shortcuts help a lot here (Click into Column A of the starting row then while holding down Shift hit Ctrl and End. With everything selected, release Shift-Ctrl-End and hit Ctrl-C. This'll put it all in your clipboard.
6. Go to your new sheet, click into Row 2 Column A, and paste (Ctrl-V) the selection from other CSV sheet.
7. Click on the column header for RPM (this should select the entire RPM series), right click on the selection and click Insert from the context menu. This will create a new column right before RPM. Also, make note of the column letter for RPM. You're going to need this.
8. In Row 1 of your new Column type "RPM / 100" to give it a meaningful name.
9. Using the column letter that you identified for RPM, click into Row 2 of your new RPM / 100 series and type "=C2 / 100" (without the quotes) and press Enter. -- this assumes that RPM is column C.
10. Click into your new RPM / 100 value in Row 2, and press Ctrl-C. Now click on Row 3 of your RPM / 100 row and while holding down Shift, hit Ctrl-End.
11. While continuing to hold down Shift, use your left arrow key to move in your selection so that only your new Row series is selected. Press Ctrl-V to paste your RPM / 100 formula into the remaining rows.
12. Click into Row 1, Cell 1 and press Ctrl-A. All data should now be selected. Go to the Insert pulldown and select Chart.
13. Select the Line Chart type and let it do its thing.
14. One series will significantly outpace all the rest (regular RPM). If you click on the series data line in the chart and hit delete it should remove it from the series list. You can also right click on the chart and select "Source Data" and remove it from the resulting dialog that way too. There are a couple different ways to go about this depending on the version of Excel you're running.
15. Remove all other unnecessary series. That's everything except RPM / 100, MAF, Air Fuel Ratio, Load %, and Vehicle Speed.
16. To clean things up further, lets now get Air Fuel Ratio onto the secondary axis. The easiest way to do this (again it varies from version to version) is to right click on the data series line once it is selected and select "Format Data Series". From there select "Plot Series On: Secondary Axis".
17. Now lets clean up the two Y axis. Select the left side labels, right click and go into Format Axis... (again ... varies). Override the Automatic settings for min and max to be right around your min and max values.
18. Do the same for the secondary Y axis. Select the right side labels and change the min/max from automatic for your AFR. I typically set my max at 15 and my min at 11.
Make sure that when you generate a chart you do so with all rows having a Load % value of around 100%. 98% and above is okay, but you really want to WOT -- pedal to the floor.2. Open Excel and Import/Open the CSV file into a workbook.
3. Create a new Sheet (New-->Worksheet) or use one of the extras (Excel typically creates 3 worksheets for a new workbook) - you can find them in the tabs at the bottom of Excel named "Sheet 1", "Sheet 2", etc.
4. Select all of Row 1 in the CSV sheet and paste it into your new sheet's Row 1. This brings over all the column headers.
5. Locate the row in the CSV sheet that you want to copy from and select it and all rows underneath. Keyboard shortcuts help a lot here (Click into Column A of the starting row then while holding down Shift hit Ctrl and End. With everything selected, release Shift-Ctrl-End and hit Ctrl-C. This'll put it all in your clipboard.
6. Go to your new sheet, click into Row 2 Column A, and paste (Ctrl-V) the selection from other CSV sheet.
7. Click on the column header for RPM (this should select the entire RPM series), right click on the selection and click Insert from the context menu. This will create a new column right before RPM. Also, make note of the column letter for RPM. You're going to need this.
8. In Row 1 of your new Column type "RPM / 100" to give it a meaningful name.
9. Using the column letter that you identified for RPM, click into Row 2 of your new RPM / 100 series and type "=C2 / 100" (without the quotes) and press Enter. -- this assumes that RPM is column C.
10. Click into your new RPM / 100 value in Row 2, and press Ctrl-C. Now click on Row 3 of your RPM / 100 row and while holding down Shift, hit Ctrl-End.
11. While continuing to hold down Shift, use your left arrow key to move in your selection so that only your new Row series is selected. Press Ctrl-V to paste your RPM / 100 formula into the remaining rows.
12. Click into Row 1, Cell 1 and press Ctrl-A. All data should now be selected. Go to the Insert pulldown and select Chart.
13. Select the Line Chart type and let it do its thing.
14. One series will significantly outpace all the rest (regular RPM). If you click on the series data line in the chart and hit delete it should remove it from the series list. You can also right click on the chart and select "Source Data" and remove it from the resulting dialog that way too. There are a couple different ways to go about this depending on the version of Excel you're running.
15. Remove all other unnecessary series. That's everything except RPM / 100, MAF, Air Fuel Ratio, Load %, and Vehicle Speed.
16. To clean things up further, lets now get Air Fuel Ratio onto the secondary axis. The easiest way to do this (again it varies from version to version) is to right click on the data series line once it is selected and select "Format Data Series". From there select "Plot Series On: Secondary Axis".
17. Now lets clean up the two Y axis. Select the left side labels, right click and go into Format Axis... (again ... varies). Override the Automatic settings for min and max to be right around your min and max values.
18. Do the same for the secondary Y axis. Select the right side labels and change the min/max from automatic for your AFR. I typically set my max at 15 and my min at 11.
You can easily convert your chart into a JPEG or BMP by selecting out of the chart, and while holding down the Alt key, press Prt Scr (Print Screen). Open up MSPAINT (Start-->Run-->mspaint) and paste (Ctrl-V) your Excel window into it. You can then use the selection tool to draw a rectangle around your chart, hit Ctrl-C (Copy), Click on file from the pulldown, select New, and then Ctrl-V (paste) your selection into a new image file. Save the image from the File Pulldown.
PM me with any questions. This can quickly take us OT.
Last edited by ShellDude; Jul 27, 2008 at 06:39 PM.
White is purdy...
Joined: Dec 2007
Posts: 656
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From: Jersey Shore
uninstalled my midpipe/accessport yesterday in prep of going to the dealer sometime this week for "loss of power" concerns. Good lord, is this how the car really felt? It feels like i have 3 dead bodies in the trunk.
The Local Idiot
Joined: May 2008
Posts: 406
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From: Big D, Texas
It seems to make sense to use the ABS wheel speed sensors for this, but I'm surprised that the tire diameter isn't configurable in the PCM. Are you saying that the ABS system reports the actual speed to the PCM periodically, or that it sends the frequency of wheel rotation?
It seems to make sense to use the ABS wheel speed sensors for this, but I'm surprised that the tire diameter isn't configurable in the PCM. Are you saying that the ABS system reports the actual speed to the PCM periodically, or that it sends the frequency of wheel rotation?
am i right?
The Local Idiot
Joined: May 2008
Posts: 406
Likes: 0
From: Big D, Texas
frequency of wheel rotation. ABS would have no way to know actual speed(based on tire diameter/circumference) unless it had that data stored in it. no need to make things more complex than they need be, so i am betting its frequency. the PCM then translates this into speed, but with no variables to change in the equation.
am i right?
am i right?
EDIT:
Thinking about it, it really doesn't matter what "units" the ABS transmits speed to the PCM in, there is still going to be some translation in the PCM to get the actual MPH number. I just find it surprising that there isn't a scaling factor that can be modified. If they decided to change the tire sizes on the RX8 would they really want to change the PCM's programming instead of just modifying a single flash parameter?
Last edited by rotary.enthusiast; Jul 29, 2008 at 05:42 PM. Reason: I'm stooopid
The PCM has nothing to do with it. The ABS-HU does the calculation.
There is firmware in there and there is probably a way to flash it, but not through the PCM.
I would imaging that there is a flash bridge in the eMDS.
There is firmware in there and there is probably a way to flash it, but not through the PCM.
I would imaging that there is a flash bridge in the eMDS.
