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Old 12-09-2006, 08:27 PM   #1
varmint007
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Member#: 13626
Join Date: Dec 2001
Chapter/Region: MAIC
Location: Maryland
Vehicle:
e39 M5

Default 2006 STi Stage 1...is -KC ok without boost?

hey geeks, I've flashed a fairly conservative map to a 2006 sti which modifies only boost and WGDC (max is 15.6 psi). Base timing, correction, and fuel are all stock.

I'm seeing KC values lower than the Map dictates, and in fact seeing negative KC in the lower load cells but only off boost. Is this ok, or should I start pulling some base timing in these areas?

Here are some Excel pivot tables summarizing about 10 minutes of logs. The format is an attempt to match the Enginuity Maps (BTW Enginuity is flat-out awesome!):

Minimum KC


Average KC


Average Boost:


Thanks!

And BTW, I've tried everything and can't seem to log IAM with the Enginuity logger. Anyone have luck doing this on an 06 sti?
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Old 12-09-2006, 10:10 PM   #2
Freon
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2009 BMW 135i

Default

To log IAM you need to find the memory address and pop it in manually. If you can post your ROM I can probably find it for you. I forgot how exactly, but I think Ecuexplorer has a feature where you can just pop in any memory address you want. You can technically log any byte of memory the CPU uses. If not, you may have to manually edit the logger XML and add a special entry there. IAM is a full 32bit float valued at 0 to 1.

It seems -1 or -2 KC is somewhat common at low loads, or slight tip-in in the cruise range. I see it closer to 2800-3400rpm around 0.4-0.8 g/cyl load. In my experience, you can't really totally get rid of it. A bone stock car does this on good fuel.
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Old 12-09-2006, 11:00 PM   #3
varmint007
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e39 M5

Default

Thanks a lot Freon...

Quote:
Originally Posted by Freon View Post
To log IAM you need to find the memory address and pop it in manually. If you can post your ROM I can probably find it for you. I forgot how exactly, but I think Ecuexplorer has a feature where you can just pop in any memory address you want. You can technically log any byte of memory the CPU uses. If not, you may have to manually edit the logger XML and add a special entry there. IAM is a full 32bit float valued at 0 to 1.
I added the following to my logger.xml file (based on a thread I found on enginuity.org). So far I've tried this with two different addresses, and in both cases my log produces nothing but 255 in the IAM field.

<parameter id="P89" name="Ignition Advance Multiplier (IAM)" desc="">
<address>
<byte>0x2A2AC</byte>
</address>
<conversions>
<conversion units="IAM" expr="x" format="0"/>
</conversions>
</parameter>

Also tried with byte: 0x020124
Is my format="0" wrong?

Here's the ROM if you feel like taking a whack at it:
http://www.sharebigfile.com/file/350...boost.hex.html

Quote:
It seems -1 or -2 KC is somewhat common at low loads, or slight tip-in in the cruise range. I see it closer to 2800-3400rpm around 0.4-0.8 g/cyl load. In my experience, you can't really totally get rid of it. A bone stock car does this on good fuel.
That's good to hear. Do you think I should be concerned that the logged KC values are lower than the KC maps? Timing is obviously getting pulled and I suspect it's due to some knock, but I'm hoping I'm wrong.

thanks again
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Old 12-12-2006, 02:23 PM   #4
drees
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2003 Silver Wagon
Tuned with Enginuity

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Those charts sure help with the tuning process, good work! Do you have them posted somewhere?
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Old 12-13-2006, 12:22 PM   #5
varmint007
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e39 M5

Default

now I do:

http://www.userbility.org/sti/Log+PivotTable_12-9.xls

The key is to create two category columns for both RPM and Load. Excel has a cool function called mround() that assigns a number to the nearest x (you supply x).

In this case the RPM is rounded to the nearest 400 rpm, and load is rounded to the nearest .15. Now I need a Macro to do this with one click.

The attached file has two worksheets: one with the raw data, and the other with the pivot table defaulting to Minimum KC (the most useful chart IMHO).

good luck,

~varmint

Last edited by varmint007; 12-13-2006 at 12:28 PM. Reason: fat fingering
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Old 12-14-2006, 01:38 AM   #6
drees
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2003 Silver Wagon
Tuned with Enginuity

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Thanks!
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