Hi mates. If there's already a post with a good explanation of this, I'm sorry, but I didn't find it.

I was trying to understand the calculation algorythm but the result doesn't make any sense (For sure, it's my fault. Of course it does make sense).

From S4Wiki: LAMBTS = KFLBTS + (KFDLBTS * KFFDLBTS)

From FR:


Being dlambts_w calculated by this other algorythm (LAMBTSZW, based on timing angle efficency):


My example flash is the fully defined 06A906032HN in which stock KFFDLBTS and KFDLBTS are like this:


I tuned KFLBTS so now it is: (both maps are the same but just transposed, to be more clear for those who are familiarized with winols)


Now, an example as I see it, simplifying a lot (Because I don't understand that map with a "T" at the end of LAMBTSZW, and it may be the key for my questions)

We are in the following conditions:
4000rpm
180% of Actual load
Exceeded tabgbts
A little bit of timing retardation

Outputs: (You'l have to imagine KFFDLBTS axis properly scaled, cuase I re-scaled KFMIRL, KFMIOP, KFLBTS, KFZW, KFZW2, KFZWOP, KFZWOP2... All the axis sharing maps, but zeroed the entire KFFDLBTS to manage lambdas just by KFLBTS. Now I want to learn more and use the timing based correction)
KFLBTS -> 0.8204
KFDLBTS -> -0.25
KFFDLBTS -> (imagine) 0.87
             dlambts_w -> KFDLBTS*KFFDLBTS=-0.2175
FBSTABGM -> 1.1

That will make the output of LAMBTS: Following FR

(0.8204 -1 + (-0.2175) )*1.1 +1 = 0.56319

It's an incredibly rich lambda !!!

What am I doing wrong? Can any of you explain it to me? It'd be very helpful



Ps: A quick question... Does the mean private chiptuner re-scale and adjust that many things to do a 350 bucks st1 remap? Or he just increases KFMIRL (Without KFMIOP, I've seen it) and LDRXNs, adds a bit of fuel and it's done?

What delta? Ignition angle is dependent on many things. And detazwbs is dependant on ignition angle efficency, not ignition angle.

Actually I don't understand your approach at all. Thank you anyway.

FSTABGM is 1, usually.

Anything over 1 is insanity. The point of that table is to range from 0 to 1.... that is, to attenuate (never amplify) BTS based on modeled EGR.

-0.18*1.0- = -0.18 -> 100% bts enrichment
-0.18*0.5 = -0.09 -> 50% bts enrichment
-0.18*0.0 = 0 ->0% bts enrichment

Well, as I understand from FR, the input of FBSTABGM is tabgbts_w which is in fact tabgkrm_w or tabgm_w. And my automation knowledge/experience is not enough to understand the block diagrams involved on it, neither my german level... Can anyone confirm if tabgkrm_w or tabgm_w are dependent on timing retardation?

First of all. Thank you for replying so fast and so many times.

Second: Yes, me too. But keep in mind that now KFDDLBTS is 0, so dlambts_w is 0 too

So it'd be: (0.8204 -1 + (0) )*1.1 +1 = 0.80244

Interesting. I had no idea. I stand corrected.