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Setting lambda issue.

Posted: Mon Sep 23, 2002 4:44 pm
by true
I need to use a custom lambda conversion since I'm not using neither the horiba or the motec unit. First of all i think it's widely known that if you input the lambda values in Custom, it will erase them next time you stop or start the program..so I have a registry file that i import after starting rom editor.

Below is what I've set for my conversion..since it only lets you use 2 digits, I already rounded to .0x.

"0"="1.4 0.69"
"1"="1.5 0.71"
"2"="1.7 0.75"
"3"="1.8 0.77"
"4"="2.0 0.83"
"5"="2.1 0.86"
"6"="2.2 0.89"
"7"="2.3 0.92"
"8"="2.4 0.96"
"9"="2.6 1.08"
"10"="2.7 1.17"
"11"="2.9 1.41"

Well, after they are imported, RomEditor rounds them again to .x.
So my values turn out to be:

"0"="1.4 0.60"
"1"="1.5 0.70"
"2"="1.7 0.70"
"3"="1.8 0.70"
"4"="2.0 0.80"
"5"="2.1 0.80"
"6"="2.2 0.80"
"7"="2.3 0.90"
"8"="2.4 0.90"
"9"="2.6 1.00"
"10"="2.7 1.0"
"11"="2.9 1.0"

The corresponding A/F to these values are as follows:

.70 = 10.38
.80 = 11.76
.90 = 13.31
1.0 = 14.7

So out of the 12 points of reference, it only uses 4...does it extrapolate in-between????
The biggest amount of difference would from my original values would be 1.5v and 1.8v...it rounded them both to .70..but in actuality 1.5v=10.08 and 1.8v=11.38...over a FULL point.....BIG difference. Anyone else notice this problem..or have a fix?? Please respond. Maybe I'm missing something simple. Thanks.

Posted: Wed Sep 25, 2002 9:23 am
by G3-TEG
I've found that if you setup the CUSTOM table using A/F values for the voltages rather than Lambda, it works just fine and saves them in the registry.

Posted: Wed Sep 25, 2002 10:42 am
by true
G3-TEG wrote:I've found that if you setup the CUSTOM table using A/F values for the voltages rather than Lambda, it works just fine and saves them in the registry.
Hmm, not quite....I guess that works, but its still rounding somehow. It must be rounded to a preprogramed lambda value? When i put the numbers in they stay fine...If i close the program and re-open it, they are pretty close, but defintely not the numbers i put in. Can't find any ryhme or reason as to it's rounding. Derek? Is this fixed in v3.0?