NefMoto

hello
my friend asking me can we change the starting revs to make a ~2000rpms right after engine started like a supercars do.. so im searching for that but cant find anything, any ideas?

From the S4 wiki:

Finally, if none of this works, you may have to increase your idle RPM and/or idle torque reserve (alters idle timing)

    NLLM - idle RPM
    NFSM - idle RPM while in gear
    KFMRES - idle torque reserve
    KFMRESK - idle torque reserve while transmission decoupled (clutch in)

If your car runs poorly while it is warming up (engine temps less than 85C-90C), you will want to tweak the warm up enrichment tables according to your STFTs:[12]

    KFFWL_0_A

its hard to explain because english is not my native
i dont meaning idle speed
i means short period right after starting the engine and before it goes to idle speed

something like that
http://www.youtube.com/watch?v=D4LmyodPNGM

Might be worth exploring **BBKHZ?

Are you using a electronioc throttle body or mechanical one with idle air control valve?

DBW
(awp 1.8t engine)

I am sorry, do not understand what is DBW.

sorry
its drive by wire
electronic throttle body

OK...I am not sure but maybe you have to lookup for ETC opening at start based on coolant temperature and altitude above sea level...

Your car does this already.  Every car does this from the factory.

The Ferrari was cold... During cold starts the idle speed is raised, this is not reserved for supercars.

my car does only 1200 rpms at cold winter start
and holds until warmup

but i need to starting with ~2000 and immediately drops it to idle (doesnt matter hot or cold)

I wouldn't go crazy high with the Rpms ....you know you have turbos probably not a good idea to go too crazy....I'd leave well enough alone

You can do that with *BBHKZ as I said earlier in this thread :-)

I went through the code a couple of weeks back and stopped my car idling at 1800 for a few secs on cold start.   It did it for cat warming but with a full exhaust it would wake the dead,  not very nice to my neighbours on early starts.

thanks, i dont thinking about it from that pov
going to rtfm  :)

ratherb1, yes i tell him about this first, but for some people those effects are much more important than a turbo life. his choice.. ::)

I think I understood what you want. In order to throw up rev after engine start (before entering in idle rev area) you should rise up KFMIRL in that area which you want to rise up env.

fukenbroken, you also can ask me Russian ;)

KFNLLNST?  ;)

It makes sense. :)
BTW I had the same result when increased KFMIRL at that area where cold engine pointing.

KFNLLKHM is the map I changed on my car.

Result was start idle of 1800 rpm (for around 5-10 secs) was modified.

thanks guys you are awesome!  :D

tbm, спасибо, я тут заодно стараюсь подтянуть свой англ) но есличо обязательно спрошу

played with KFNLLNST today
and here is the result

http://youtu.be/0JJz0j9TBz8

Now this car like Ferrari  ;) All girls will be yours :)

(http://trendology.ru/wp-content/uploads/2012/01/fuck-yea.jpg)

not for my silent exhaust :(

ok, you should install another exhaust also  ;D

Added to s4wiki. Thanks everybody!

Nice!  I'll have to get lost in IDA to find KFNLLNST now  ::)

Result is better than on Ferrari!
 8)

Does it do that when the car is stone cold too?

If yes I suppose you don't like your motor very much

there is coolant temperature axis
so you can set it to any safety temp. like 50+ or 80+

I understand that, but having a cold/dry engine rev like that on startup is not really that smart IMO.

Oil pressure is very low during cranking and most of the motor will be try when sitting overnight. To have it rev like that right after cranking to me doesn't seem like the best idea.

But then again, I don't drive a super car ;)

sorry my english is not very well

if you set it to 50+ for example - your car wont use this at cold start
and i think nothing bad to do it at warm conditions

and as i said before - i tell my friend that it is not good idea anyway but he answered that effect more important for him than turbocharger lifetime

I see

Sorry for the old thread, but need a little input please regarding KFNLLNST.

I assume the X axis is the coolant temperature, and the Y axis is the time in seconds to hold this RPM? Correct?

If I want a fast RPM startup, only when engine warm, I assume I change the 840 in the lower left hand corner? Would it work at 0 seconds?

Thank you :)

That didn't work. It idled up on start up, but took a long time to settle again. Perhaps I'll have a look at the cat pre-heating

The axis is tmot iirc

other axis is seconds since start (can't remember the label)

Maybe theres a constant for sync lock at Bosch, too? Raise the limit and it should take longer to start the engine, so oilpressure can be build. Thats what those sportscars do.

How did you get that from my post matey?

There's two functions iirc ones starting rev with a countdown (KFNLLNST) the other is RPM base on tmot KFNLLKHM, I found the latter on Volvo 05+ as it would rattle my house foundations on a winter morning with a 1800rpm at 0 degrees or something, setting it lower helped my life and a few other...

It was then added to the wiki by I assume NYET.

KFNLLNST can give you the supercar rev up then down on start, shit if you ask me lol

KFNLLKHM is for CAT heating as far as I can tell from the code.

@mustafa

Either your ME7 code is different or that is not KFNLLNST more like KFNLLKHM

Just set the whole map below min rpm sorted..., that's how it's done oe.  (say 500)

There's also KFNFSKHM (drive engaged cat heating)

p.s.  iirc min idle speed is governed by NSNOT?

You guys need to look at whatever Mercedes did with the C63. I still get goosebumps when it starts.

I think I was looking at the asm before, madness.

Please see pic. According to the map pack, I've got the correct table. I tried altering it, but didn't seem to work properly.

what did you change in KFNLLNST ?

at me rpm 1800 reach with a delay after start (((

https://youtu.be/x52ODVvxxEc

На драйве Ване напиши)

Да я его достал уже наверно , просто мне кажется он что то еще поменял , у меня обороты с задержкой к 2000 прыгают , а у него по видео сразу.

Sorry i know it's an old topic but i have the same issue, there are a delay before the effect of my KFNLLNST value. Thanks

Increase initial throttle position in start.
I don't remember anymore what the map id is, but it solves the issue you are having.

I have only found WKSDNLN. There are other map to do that ?

А чем отличается KFNLLNST от NLLMG?

Was it any of these?

WDKSAPP
WDKSNLN 
WDKUGDN
FPWDKAPP