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Old 12-21-2004, 11:59 AM   #1 (permalink)
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Exclamation wideband and e-01 conversion problem

I hooked up my zeitronix wideband to display on my e-01. The volts are correct because I am getting the correct voltage 2.5 for my car per zeitronix's conversion (2.5v=14.7A/F) at idle so it's hooked up correctly. But, when I put in the voltage conversions on the e-01, the A/F ratio is off. It will read 18.5 A/F ratio at idle instead of 14.7, and 14.7 is correct for my car and that's what 2.5 volts is on the zt-2 conversion table. The e-01 has a conversion for the highest and lowest A/F and highest and lowest volts. It messed up when I put in the highest and lowest sets of data that come on the ZT-2 conversion table. Is there a certain set of data I should use for the e-01 to display correctly? I can only pick from two. Someone has to be also using this wideband along with an E-01.

I mean I know what is going on but has anyone made it work?
Ok the highest and lowest volts by zeitronix conversion are 3.27v = 21.2 A/F and .15v = 9.7A/F and the median of those volts is 1.56v which equals 12.1A/F by zeitronix. But, obviously, 12.1 is not the median of 21.2 and 9.7 and that's the problem. The e-01 converts my 2.5v idle to 18.8A/F because there is no pattern of the zeitronix conversion table.

Another example:
By zeitronix .15v = 9.7A/F and .31v = 9.9A/F So, every .16v+ means .2+ A/F
But, 2.8v = 16.9A/F and 2.96v = 18.5A/F
The volts still only went up .16 but the A/F jumped 1.6 instead of only .2 like the other one.

I hope this all made sense. Thanks.
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Old 12-21-2004, 12:18 PM   #2 (permalink)
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Quote: Originally Posted by FrontMounted
I hooked up my zeitronix wideband to display on my e-01. The volts are correct because I am getting the correct voltage 2.5 for my car per zeitronix's conversion (2.5v=14.7A/F) at idle so it's hooked up correctly. But, when I put in the voltage conversions on the e-01, the A/F ratio is off. It will read 18.5 A/F ratio at idle instead of 14.7, and 14.7 is correct for my car and that's what 2.5 volts is on the zt-2 conversion table. The e-01 has a conversion for the highest and lowest A/F and highest and lowest volts. It messed up when I put in the highest and lowest sets of data that come on the ZT-2 conversion table. Is there a certain set of data I should use for the e-01 to display correctly? I can only pick from two. Someone has to be also using this wideband along with an E-01.

I mean I know what is going on but has anyone made it work?
Ok the highest and lowest volts by zeitronix conversion are 3.27v = 21.2 A/F and .15v = 9.7A/F and the median of those volts is 1.56v which equals 12.1A/F by zeitronix. But, obviously, 12.1 is not the median of 21.2 and 9.7 and that's the problem. The e-01 converts my 2.5v idle to 18.8A/F because there is no pattern of the zeitronix conversion table.

Another example:
By zeitronix .15v = 9.7A/F and .31v = 9.9A/F So, every .16v+ means .2+ A/F
But, 2.8v = 16.9A/F and 2.96v = 18.5A/F
The volts still only went up .16 but the A/F jumped 1.6 instead of only .2 like the other one.

I hope this all made sense. Thanks.

this is the main reason why using a 0-5v linear output is easy to set up. the LM1 has a linear output as does the PLX units.

i have the LM-1 set up to output 0-5v (10.00-19.99 afr) on the E01 i have the same conversions made.

on ours 2.35v =14.7:1

so on your E01 you have the following:

0 volts --- 9.70 afr
3.5 volts -- 21.00 afr

i think the problem you are running into is that 3.5 volts does not equal 21:1 afr. 3.25v seems more like 21:1 afr, according to the diagram below.


have you tried setting it up on the E01 to read:

0 volts-- 9.50 afr
5volts -- 21.0 afr?
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Old 12-21-2004, 12:25 PM   #3 (permalink)
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man, that's going to suck, the output is not linear.
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Old 12-21-2004, 12:28 PM   #4 (permalink)
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looking at the zeitronix site i see this:

Analog Wideband Output 0 - 5V , under ouput range. so maybe it is a analog linear output (0-5v)

have you measured the output wire to see if it displays 5.00 volts while it's free air.
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Old 12-21-2004, 05:19 PM   #5 (permalink)
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Quote: Originally Posted by NIVO88T
looking at the zeitronix site i see this:

Analog Wideband Output 0 - 5V , under ouput range. so maybe it is a analog linear output (0-5v)

have you measured the output wire to see if it displays 5.00 volts while it's free air.

It's about 3.30v with the car off showing 21.3 A/F. When I was driving, the A/F e-01 peak memory thing shows 31.6 A/F so that would mean that it probably did show somewhere around 5 volts then. I guess that I will try just entering 0-5v and see what happens. My car is still running on stock fuel everything and stock 03 injectors. I have not done any fuel mods until I get this wideband thing straightened out.
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Old 12-21-2004, 05:24 PM   #6 (permalink)
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Quote: Originally Posted by NIVO88T
looking at the zeitronix site i see this:

Analog Wideband Output 0 - 5V , under ouput range. so maybe it is a analog linear output (0-5v)

have you measured the output wire to see if it displays 5.00 volts while it's free air.

Not trying to hijack this thread but I need some help to , I have the LM-1 hooked up to mine , on the e-o1 screen I have the volt at 2.35-5.00 & conversion at 0-0 . What do I need to put in for the conversion ?
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Old 12-21-2004, 05:28 PM   #7 (permalink)
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Quote: Originally Posted by 2.4TURBOMAN
Not trying to hijack this thread but I need some help to , I have the LM-1 hooked up to mine , on the e-o1 screen I have the volt at 2.35-5.00 & conversion at 0-0 . What do I need to put in for the conversion ?

Nivo said this earlier:
Quote:
i have the LM-1 set up to output 0-5v (10.00-19.99 afr) on the E01 i have the same conversions made.

So that means you put 0 and 5 in the volts blanks and 10.00 and 19.99 in the blanks below that.
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Old 12-21-2004, 05:32 PM   #8 (permalink)
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Quote: Originally Posted by FrontMounted
Nivo said this earlier:

So that means you put 0 and 5 in the volts blanks and 10.00 and 19.99 in the blanks below that.

Thanks.
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Old 12-21-2004, 05:44 PM   #9 (permalink)
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Quote: Originally Posted by 2.4TURBOMAN
Thanks.

also, you need to reconfigure the outputs on the lm1 to read afr and 0v=10.00:1 and 5v=19.99:1.

you will need the lm1 software to do this and a desktop or laptop.
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Old 12-21-2004, 11:23 PM   #10 (permalink)
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Having the same problem with my zeitronix. I'm just going to take a voltage in the 9.x range and use the 2.5v at 14.7 and see how close it is.
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Old 12-22-2004, 03:45 AM   #11 (permalink)
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Quote: Originally Posted by SRT42B
Having the same problem with my zeitronix. I'm just going to take a voltage in the 9.x range and use the 2.5v at 14.7 and see how close it is.

Ok, I just got an email back from zeitronix. They said to put in the rich side of the conversion and then up to 14.7 like what you are saying.
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