Converting volts to a A/F ratio
 

If I was getting some thing to data log my A/F ratio and it only read in volts . How would you convert the voltage reading into a actual A/F ratio . Is there a conversion chart ? thx Bill

what scale are you using? 0-1 volt or 0-5 volt?

Well Im not sure...I would think its what ever the stock ECU uses .Enthuzd is looking to getting a group buy going on a SS box with 4 extra analog inputs in it . So we can data log A/F and what ever 3 you would want . Plus I was looking at the Blitz R-vit 1 to do the same thing .

what type of 02 sensor are you using as the source? factory narrow band or a wideband? if narrow band its a 0-1 volt, if wideband it's a 0-5 volt span

I would personally not even go crazy to try to log a narrow band sensor...it can be used as a guide, but it can be so fickle with humidity changes, etc, it's very hard to tune off of.

enthuzd is asking the SS people about how it would read on the R4 data log program . If it is a wide band 0-5 volt . How do you convert it to a actual A/F ratio ?

Ask and ye shall receive....

Thanks...just what I was looking for....I dont care what they say about you ......your alright with me........lol

That is the chart for the AEM wideband. I dont think all 0-5V sensors use the same conversion factors. Some are linear..some are not.

best thing, like Z1 mentioned, is to contact the manufactuere of the sensor in question...and get it directly from them.

Don't rain on my parade GQ. I did a good thing posting the chart. Booger has the AEM and he needed to know what the 0-5v was equivalent to. The split-second box will show you voltage input when you look at the recordings.

If we get the new SS box . Does the AEM gauge have a lead to go to the SS box ?

YES!!!!!!!!! I think we're getting close Boog..

Sorry...here is an umbrella. My bad. :) I didnt realize he had the AEM.

Here is what you need I believe
 

Volts===========AFR

0 ===== 10
0.0625 ===== 10.1
0.125 ===== 10.2
0.1875 ===== 10.3
0.25 ===== 10.4
0.3125 ===== 10.5
0.375 ===== 10.6
0.4375 ===== 10.7
0.5 ===== 10.8
0.5625 ===== 10.9
0.625 ===== 11
0.6875 ===== 11.1
0.75 ===== 11.2
0.8125 ===== 11.3
0.875 ===== 11.4
0.9375 ===== 11.5
1 ===== 11.6
1.0625 ===== 11.7
1.125 ===== 11.8
1.1875 ===== 11.9
1.25 ===== 12
1.3125 ===== 12.1
1.375 ===== 12.2
1.4375 ===== 12.3
1.5 ===== 12.4
1.5625 ===== 12.5
1.625 ===== 12.6
1.6875 ===== 12.7
1.75 ===== 12.8
1.8125 ===== 12.9
1.875 ===== 13
1.9375 ===== 13.1
2 ===== 13.2
2.0625 ===== 13.3
2.125 ===== 13.4
2.1875 ===== 13.5
2.25 ===== 13.6
2.3125 ===== 13.7
2.375 ===== 13.8
2.4375 ===== 13.9
2.5 ===== 14
2.5625 ===== 14.1
2.625 ===== 14.2
2.6875 ===== 14.3
2.75 ===== 14.4
2.8125 ===== 14.5
2.875 ===== 14.6
2.9375 ===== 14.7
3 ===== 14.8
3.0625 ===== 14.9
3.125 ===== 15
3.1875 ===== 15.1
3.25 ===== 15.2
3.3125 ===== 15.3
3.375 ===== 15.4
3.4375 ===== 15.5
3.5 ===== 15.6
3.5625 ===== 15.7
3.625 ===== 15.8
3.6875 ===== 15.9
3.75 ===== 16
3.8125 ===== 16.1
3.875 ===== 16.2
3.9375 ===== 16.3
4 ===== 16.4
4.0625 ===== 16.5
4.125 ===== 16.6
4.1875 ===== 16.7
4.25 ===== 16.8
4.3125 ===== 16.9
4.375 ===== 17
4.4375 ===== 17.1
4.5 ===== 17.2
4.5625 ===== 17.3
4.625 ===== 17.4
4.6875 ===== 17.5
4.75 ===== 17.6
4.8125 ===== 17.7
4.875 ===== 17.8
4.9375 ===== 17.9
5 ===== 18

Re: Here is what you need I believe
 

Damn DFW, are your fingers tired? I hope you copied and pasted that.

Thanks guys

I would call AEM if it were me. On a narrow band sensor 90-1 volt), 0 is leanest, 1 is richest