maf "the final question(s)?"
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Originally posted by kvu
Would'nt a BIN value be in the calculation along with(198 * 48) / 256 = 37.125 gms/sec? I just can't figue out what column changes. guess that would be one more piece of the puzzle
.
Would'nt a BIN value be in the calculation along with(198 * 48) / 256 = 37.125 gms/sec? I just can't figue out what column changes. guess that would be one more piece of the puzzle
.one that changes when editing the MAF scalar table (the 198
value).
To do this properly the bin editor would reverse the above
equation. If the user wanted to change the 37.1 gms/sec value
(1.92 MAF volts) to 40 gms/sec:
N = (gms/sec * 256) / scalar
N = (40 * 256) / 48
N = 213
The value 213 would end up in the first column of the scalar
table replacing the value of 198. The reason I listed the MAF volts
is due to the MAF scalar tables being referenced to MAF voltage.
As the MAF volts is not available via the ALDL it is understandable
that most folks refer to gms/sec locations whenever they work
with the MAF scalar tables.
This does make it confusing. Just need to remember that the
MAF scalar table locations are based on MAF voltage. The table
values are the gms/sec of airflow at that MAF voltage. Then of
course the MAF voltage is the actual output from the MAF based
on how much air the MAF feels (bad pun) is flowing through it.
RBob.
P.S. If I were doing MAF scalar table tweaking I would change an
ALDL location to output the MAF volts. In that manner the MAF
tables could be more accurately referenced.
Last edited by RBob; Jul 3, 2002 at 07:11 AM.
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Originally posted by kvu
I downloaded hex workshop,but can't figure it out
.There is two bins up in the post. I have changed the maf tables in one.Could someone check em out and see what column changes?
I downloaded hex workshop,but can't figure it out
.There is two bins up in the post. I have changed the maf tables in one.Could someone check em out and see what column changes? Looks like you changed MAF scalar tables 1, 2 & 3. Here are the
tables from the two bins roughed out:
Code:
File: stkmaf.bin ; MAF scalar table 1 005B3 24 ; tbl scalar 005B4 8 ; tbl line cnt 005B5 64 ; gms/sec = (64 * 24) / 256 = 6 gms/sec 005B6 36 ; 005B7 50 005B8 68 005B9 93 005BA 121 005BB 153 005BC 193 005BD 246 ; MAF scalar table 2 005BE 48 ; tbl scalar 005BF 8 ; tbl line cnt 005C0 123 005C1 134 005C2 149 005C3 164 005C4 180 005C5 199 005C6 217 005C7 236 005C8 253 ; MAF scalar table 3 005C9 81 ; tbl scalar 005CA 8 ; tbl line cnt 005CB 150 005CC 161 005CD 173 005CE 185 005CF 198 005D0 211 005D1 225 005D2 240 005D3 255 File: modmaf.bin ; MAF scalar table 1 005B3 24 ; tbl scalar 005B4 8 ; tbl line cnt 005B5 64 005B6 41 005B7 58 005B8 75 005B9 93 005BA 121 005BB 153 005BC 193 005BD 246 ; MAF scalar table 2 005BE 48 ; tbl scalar 005BF 8 ; tbl line cnt 005C0 123 005C1 134 005C2 147 005C3 162 005C4 180 005C5 195 005C6 214 005C7 232 005C8 253 ; MAF scalar table 3 005C9 81 ; tbl scalar 005CA 8 ; tbl line cnt 005CB 150 005CC 161 005CD 172 005CE 184 005CF 196 005D0 208 005D1 221 005D2 237 005D3 255
is the bin value in decimal. Will need to do the math on each
to get the gms/sec airflow. Also look at the hac for the MAF volts
that correspond to each row.
RBob.
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RBob quote:
Looks like you changed MAF scalar tables 1, 2 & 3. Here are the
tables from the two bins roughed out:
Looks like you changed MAF scalar tables 1, 2 & 3. Here are the
tables from the two bins roughed out:
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Originally posted by kvu
I can't figure out how those changes dramatically upset lv8 calculation as others have stressed
I can't figure out how those changes dramatically upset lv8 calculation as others have stressed
This is where an ecm bench pays for itself in minutes, but we'll do it the PITA way.
Take a copilot or datalog some given conidtions, repeat them 5-6x so you have an accurate data sampling.
Then in the range of 15gm/sec make some serious MAF table changes.
Repeat the data logging and compare results.
You'll note, the indicated gm/sec at a given circumstance has changed. Once you change the gm/sec, it changes the LV8 calculation.
The calculation defines what gm/sec your at in ref to a MAF voltage.
If you had a bench, I could splain a faster way to get it, but trying it on a car, wouldn't even be a good idea.
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Grumpy,look at the changes I made to the 3 tables.I only made very minor corrections.I'm not aiming to recalibrate the maf tables.I've just gotten amazing results just by making changes similar to the bins I posted for download.I can see how serious changes could be very bad.I'm not doing things entirely blind though.In fact I have a logic that works for minor changes in the maf tables. Look at the bins and tell me what you think.If those changes are too radical let me know.Even if you feel I'm wrong at least there is alot more info on maf cars now.People can search and find pieces of the code and how to understand it.I would like to thank everyone that has helped me!
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
Originally posted by tpi_roc
Imagine how you came out though to some innocent fool just trying to get his post on
You came in swinging pretty strong unprovoked.
Imagine how you came out though to some innocent fool just trying to get his post on
You came in swinging pretty strong unprovoked.
Last edited by Grumpy; Jul 19, 2002 at 06:57 AM.
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