Tuning WOT in AFM calibration - correct way?

[typer86]

Hi Hondata,

I am not sure is this process is correct to tune the WOT (high cam) for AFM calibrations.
Please correct me if this way is wrong.

1. To determine the fuel only the lambda values will be used - in this case WOT lambda adjustment high
2. To analyze the correct fuel - load the logfile with a 3th gear pull which include a pull to the rev limiter.
> then click the button: show the suggested fuel change...

In the example I would like to reduce the fuel in col. 10, 11 to 6%
in col. 12 to 16 I would like to reduce the fuel to 4%

IMG-20151101-WA0000.jpg

Now the questions:
Is that way correct to change the fuel:
Select the col. which I would like to edit... And increase or degrease in percent

fuel_change.jpg

Thanks to clear the situation.

Regards again :)

[typer86]

In other words, can I enter the target lambda to 0.80? currently 0.75 is the lowest value but I think it is very rich.

BTW it is for the supercharged FN2 @ 10psi.

Regards.

[Hondata]

Are you using fuel tables, or is it still using the AFM for fueling?
When using the AFM you need to keep at the injectors stock, and then adjust the AFM to flow table. Then you can adjust the fuel compensation.
With fuel tables you ignore the AFM to flow table, keep the WOT compensation stock and just adjust the fuel tables.

[R-12914]

We would use a hybrid-Map!

[typer86]

Hi Hondata,

thanks for your reply.
I understand - so I build a new version with your defaults.

The cal is 100% AFM based - the cal is for my Rotrex centrifugal supercharger.

I am not sure if I can test this version without damage the car.... I have a bad feeling to rev the engine high with the new calibration.
I am very happy if you could check the "ignition high" and the "WOT lambda adjustment high" and give me a feedback if I can test this setup without getting in trouble.

ignition_1.PNG

WOT_high.PNG

[typer86]

Are you using fuel tables, or is it still using the AFM for fueling?
When using the AFM you need to keep at the injectors stock, and then adjust the AFM to flow table. Then you can adjust the fuel compensation.
With fuel tables you ignore the AFM to flow table, keep the WOT compensation stock and just adjust the fuel tables.

Hi Hondata,

The car will tuned with AFM only.
To finally understand the process I ordered different books which is very helpful to a decided point - (I am happy with the jeff hartmann books).

But anyway I tuned the car with this guide from you - it is a good process but now I spin around in the WOT tuning process without further information I am stuck here:
Guide: => https://www.hondata.com/tech-tuning-boost-afm
Currently closed loop runs very good. The calibration of the injectors are done...

Today I tested the WOT and I am wondering that the lambda adjustment in the WOT lambda section will be ignored.
The engine runs super rich although in the WOT lambda section other target values are filled in correctly.

To make it leaner from 0.69 to --> target: 0.83/0.80 I think the AFMflow > Mass flow (g/s) in the 4 until 5,00v section? must reduced to a lower value.
In which steps I must do that? I could not found any information to make that correct.
If I reduce the value in the (g/s) high section in -2% or so which target lambda will be archived?

It would be very helpfully for me and other people if you can add the WOT AFM tuning steps in the tech-tuning-boost-afm documentation too.
(To make it leaner or richer)

I will learn more and more - Thanks :)

[R-12914]

Hondata, any news about this?

[Hondata]

I'm not sure what you exact questions are.
Have you calibrated the AFM using stock injectors? I seem to recall that with the manifold it is not possible. In that case, AFM tuning is not going to work very well.
Are you trying to use the WOT compensation to alter fuel at part throttle? It appears so from the screenshot. Again in that case VE tuning would be better.
AFM tuning works well on a stock vehicle, but VE tuning is better as you modify the car.

[typer86]

I'm not sure what you exact questions are.
Have you calibrated the AFM using stock injectors? I seem to recall that with the manifold it is not possible. In that case, AFM tuning is not going to work very well.
Are you trying to use the WOT compensation to alter fuel at part throttle? It appears so from the screenshot. Again in that case VE tuning would be better.
AFM tuning works well on a stock vehicle, but VE tuning is better as you modify the car.

Have you calibrated the AFM using stock injectors?

No I calibrate the injectors with the custom designed manifold from the TTS kit.

Are you trying to use the WOT compensation to alter fuel at part throttle?

I will alter the fuel at part and full throttle.

Ok If I tune with VE tables I think the process is clear.
Load datalog and calibration... open tables > show high fuel > show the suggested fuel change from lambda values, right?
It is documented very good in your manual. > Tuning part throttle Fuel (MAP)

[typer86]

Hi Hondata,
I found the way to determine the correct lambda / AF ratio.
If the measured lambda becomes richer then 0.8 you need longer dead time, if it's lean then you need shorter dead time so change the value accordingly by 50%
Take care changing deadtime values means VE table will need to be retuned!
Or if you re using AFM cal you must re-calibrate the AFM fuel timings.

Regards

[typer86]

Hi Hondata,

which setting you prefer?
>> Options > Settings > Lambda Overlay

I am not sure which setting I must setup in the Medium load range for the intercoolded centrifugal supercharger.

low load: 1
medium load: ?? (0,92 (default))?
high load: 0,81

thanks for help

btw: many thanks again for answering all my questions. With books (Jeff Hartman - Motorbooks workshop) and many time and testing to validate the options I understand now the steps to make a proper tune. Unfortunately I did not have a dyno to make a final HP test to see how much power the engine make. If I am finished, I will post a 3th gear pull and a screenshot with AFM.c vs S.TRIM + WOT lambda adjustments.

[typer86]

Hi Hondata,
my AFM cal without dyno is finished for the intercooled rotrex.
Target lambda: 0.81 for WOT
Fuel eco is very good.

Comments are welcome.

FN2_Rotrex_SC_MAF.1.15.fpcal

FN2_Rotrex_SC-v1.15-1.fpdl

FN2_Rotrex_SC-v1.15-2.fpdl