Air/Fuel Ratio

[Daz_gibbo]

I have done a log using 002 and put the information into a template from rosstech. Im seeing values up to 17 as shown below, should I be worried?

RPM	Load %	A/F ratio
1880	49.6	14.11
1960	56.4	15.32
2040	73.7	16.62
2080	75.2	17.87
2160	62.4	14.23
2240	54.9	14.32
2280	55.6	14.74
2360	54.9	15.48
2400	55.6	14.84
2480	82.7	14.54
2600	109	15.55
2800	136.1	14.18
3000	160.9	13.55
3360	182.7	12.79
3680	182	12.56
3960	181.2	12.38
4240	175.2	12.17
4480	169.2	12.40
4720	163.9	12.32
4880	159.4	12.46
5160	154.1	12.51
5320	148.9	12.36
5480	143.6	12.19
5680	139.8	12.14
5800	136.8	12.51
5960	134.6	12.46
6080	132.3	12.46
6240	129.3	13.05

 

[cupra_matt]

1960 56.4 15.32
2040 73.7 16.62
2080 75.2 17.87

that looks a bit lean to me.

On full boost i think it should be in the 12's, but iam no expert.

 

[goble]

nah that fine just boosting then flips to rich o.k. at that limit

 

[ibizacupra]

this is with the narrow band lambda yea?

inaccurate device that it is

 

[cupra_matt]

Sorry, the part i was looking, is where it is reading 15,16,17 but when i look its all within 100 rpm.

Like my school teachers said, read the question twice answer once. LOL

 

[Daz_gibbo]

That was derived from (100*Inj period[ms] *RPM)/120000
Not using lambda.

 

[cupra_matt]

I have downloaded the a/f ratio thing from Rosstech, how do i get it to work?

 

[Daz_gibbo]

Just paste your info from block 002 into the blue highlighted area

 

[cupra_matt]

Ah, DOH, only have excel viewer. Cant do it.

 

[ibizacupra]

That was derived from (100*Inj period[ms] *RPM)/120000
Not using lambda.

I would be interested to see how that works when compared to wideband actual measurements.

 

[PhilW]

Gonna bump this using a log from ages ago.

I'll get my 002 off my laptop tomorrow, but does this look like its running rich to you?

RPM	Load %	A/F ratio
2480	143.6	15.01
2720	160.9	14.17
3000	182.7	13.75
3240	185.7	13.28
3560	184.2	13.10
3840	181.2	12.37
4080	177.4	12.10
4280	173.7	12.22
4520	170.7	12.07
4720	165.4	11.79
4880	160.2	11.97
5080	156.4	11.58
5200	151.9	11.59
5320	148.1	11.49
5440	145.1	11.17
5520	142.9	10.95
5640	140.6	11.09
5720	139.1	10.99
5840	136.8	10.99
5960	134.6	11.06