Hello all,

I have been struggling a lot recently to get a proper way to tune KFMIRL/KFMIOP, and have found a lot of precious information on this forum, it has been a very precious source of information, thank you nefarious community.

However, during my selfquestioning about KFMIRL/KFMIOP relationship and tuning, I noticed something, and I must be mistaken, but would need clarification from the experts.

Let’s take a med9.1 S3 stock maps :

KFPED stock and KFMIOP attached.

At 3000 rpm, 85% pedal, the driver requests around 98% torque. (mrfa)

If we take a look at stock KFMIOP, we have at last line max torque around 85/86% (mimax) :

If we look back at KFPED, 85/86% is the torque requested at around 65/70% pedal depending on rpm.

Does it mean that from 65/70% up to 100% pedal, we will have same torque request and thus same load capped by mimax in KFMIOP ??
Seems really strange that half the pedal is “useless” so maybe I missed something ?



Edit :

Went again on your very good S4 wiki guide, and found "Done properly, mimax should be safely high enough to never limit torque request, such that it is higher than mrfa from KFPED." for the tuning part. So meaning that stock it is not the case ?

I think LDRXN stock is around 170/175 max for the load (rlmax) so in KFMIOP, if I understood correctly we have mimax around 80% torque. Meaning in stock when mrfa > 80% we have the same load output? because it is capped ?

And when tuning, usually KFPED is stock I guess, and thus often to 100%, so when tuning KFMIOP, the row corresponding to rlmax should be higher thant 100% torque?

Sorry if I ask noob questions, I keep searching...

Ok thank you very much nyet !
That makes more sense now.

So I tried a quick tune of my soft, targetting 192 load in LDRXN, now from what you said, I extended IOP axis to include 192 load, and extrapolate inside values of IOP, I get a new mimax for my 192 load around 83/84 torque.

Then in IRL for 83/84 % torque I have updated loads to match to my IOP and so match my targetted load of 192.

Pictures attached, did I do correctly?

Thank you again really appreciated ! I finish my Stage 1 soft and will my flash and log my car and keep you updated with great pleasure

Do you think I should open a topic to present my work on my stage 1 btw?

Also, can I try to rescale KFPED to make it a little more "responsive" between 60 and 100%?

Also, keep an eye on the HBN cap as well

Yes, but LDRXN also goes into IOP to generate mimax, which limits mrfa from IRL

Ok I will do that, in another thread then  



Thanks for the tip, already modified in my mod, I will share the details in the topic I will create
Edit : topic created here : http://nefariousmotorsports.com/forum/index.php?topic=15359.msg121101#msg121101   


Indeed I 've been thinking again about this... And even with my Mod I don't know how to make mrfa > mimax for a lot of the last rows from KFPED ...
In KFPED from 75/80% to 100% pedal, it will have an output of mrfa between roughly 85 to 100% torque, and even with LDRXN set to 192, in KFMIOP it gives a mimax of around 83% torque, so mrfa>mimax for a lot of the last rows of KFPED... Or am I mistaken?

And is it really a problem if mrfa>mimax for those throttle areas? If yes, I don't know how to avoid this if not lowering the KFPED in those areas to be below mimax... Here for instance I would modify KFPED between 75 to 100% pedal to have mrfa below 83% torque ?

I've moved it to the community section

Thanks for your work and excellent documentation of what you are doing.