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Trouble with BLM's

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Old Jul 8, 2006 | 11:34 AM
  #1  
twadam's Avatar
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Trouble with BLM's

I'm having a tough time smoothing out my BLM's.
I really think I'm going about it the wrong way.
For a little background, for a living I am a Database
Administrator. So I probably have a different view point
than most people when I'm looking at my data logs.

What I've done is to import my .csv logs into a Database
and have written some queries to look at the BLMs.
I can see how many records I have at a given BLM, then
I'll drill into that to see what the RPM and kpa are for that
BLM ... then I modify the VE table accordingly. Problem is
going this route you loose the chronological order of the
data. In other words record 100 might have a BLM of 118,
RPM of 1200, kpa = 55. But it doesn't show you that records 90-99
were 2000 RPM kpa 70-80 and BLM of 108.

I guess I'm confused on how to approach this. Here is why I'm second guessing my current approach. The following table is from my 4th try at this,
it shows how many records in the log have a given blm:
blm-count
115-15
117-333
119-1402
121-1410
123-1947
125-1286
127-914
128-1
129-643
131-681
133-585
135-631
137-112
139-202
141-65
143-58
145-54
147-64
149-40
151-37

The next table is based off what we changed in the VE table according to the above data. Does it seem like we went backwards ?

blm-count
108-67
109-12
110-172
111-40
112-35
113-109
114-166
115-264
116-392
117-181
118-192
119-245
120-736
121-795
122-447
123-621
124-357
125-536
126-429
127-261
128-288
129-203
130-75
131-105
132-12
134-11
136-53
138-23
140-22

The car seems to be running better and better each time ... but it just looks odd to me. We have virtually eliminated the low RPM high kpa popping through the intake. Looking for some advice. But it almost looks like I'm spreading the BLM's out more rather than pulling them into the 128 "magic number" range.

What I would really like to do is write some Stored Procedures to go in and analyze a log and result in a new VE table, I just haven't quite figured out the logic in the data yet.

Last edited by twadam; Jul 8, 2006 at 11:43 AM.
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Old Jul 9, 2006 | 02:12 PM
  #2  
Grumpy's Avatar
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
You might be over analysising things.

A glance at the scanner will tell ya where you are, and what the BL is. Just make mental notes, and then pull over, burn a new chip, write your notes, and repeat as necessary. Or, get one of the VE learn softwares, and use that.

Personally, I spend alot of time with a WB, use open loop, along with the note taking technic.
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Old Jul 9, 2006 | 08:28 PM
  #3  
twadam's Avatar
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Originally Posted by Grumpy
You might be over analysising things.

A glance at the scanner will tell ya where you are, and what the BL is. Just make mental notes, and then pull over, burn a new chip, write your notes, and repeat as necessary. Or, get one of the VE learn softwares, and use that.

Personally, I spend alot of time with a WB, use open loop, along with the note taking technic.
I don't deny I might be over analyzing ... what do you mean by "WB" and open loop. You tune your BLM's in open loop ?

One of my next options was to emulate while we were driving. Seems to make sense.

Thanks.
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