NefMoto

noticed couple of tuners now offering gear dependent boost, but had a quick scout on here cant nothing yet, has anyone got any info/guides on this ??? could be a big thing for us big(ish) power FWD boys

Do me7 equipped cars have the necessary hardware to implement this?

does pick each gear via vcds (and edit map NVQUOT?? for each gear) and seen couple of tuners offering this for me7.5 so must be able?

You can easily just switch LDRXN based on gear for example.

IIRC there is two ways to do this in ME7. There's a torque limit for air charge based on gear and a I think there is a desired load limit as well. I can post the actual map names later.

No need for magic tricks, ME7 has a map for gear dependant torque limiter (I think its active only on APX engines though, 354178 uses this for example).

This is enabled for all Volvo ME7's also. It's set between 0 to 100% on each gear.

KFMDBGRG is torque limit for air charge from RPM and gear only above an engine temp and vehicle speed threshold.

MDBGRGA is torque limit for air charge and is strictly gear dependant.

I may have been mistakenly thinking FKLDOBG when I mentioned a requested load limit. This is the gear dependant factor for KFLDRXO in %LDOB which gives drlmaxo, an additive to rlmx_w in LDRLMX. LDOB never even gets executed in M box as far as I can tell. To summarize, not useful.

sweet so can use just KFMDBGRG? and has added bonus of not only gear dependent boost and at each gear with different RPM in each gear :-)

where do i find the temp and speed thershold?

Kennfeld mit dem Wert der Momentenbegrenzung (7x4)

(,1 : 1 Umrechnug (dez/hex))/%

                        
                  0.00   1.00            2.00           3.00        4.00           5.00              6.00
Upm   2800.0   98.9990   79.9988   78.9993   99.9985   99.9985   99.9985   99.9985
   3000.0   98.9990   69.9997   77.9999   84.9991   99.9985   99.9985   99.9985
   5000.0   99.9985   54.9988   79.9988   99.9985   99.9985   99.9985   99.9985
   5200.0   99.9985   64.9994   99.9985   99.9985   99.9985   99.9985   99.9985

I am using KFMDBGRG on my M-box on a 2.7T to make 3rd and upper gears to spike and taper less (avoid overboost) but still spike 25psi in lower gears.

I assume if you have TM switched off this wont work?

Torque management switched off?

I assume you are talking about ignition angle intervention from torque management. You daily the car like that? Why?

This works on the torque request for air charge, which is the main input for desired load, so yes you can still utilize this.

These maps will limit the input to KFMIRL.

Yes TM switched off.

Why? You can get far smoother ignition angles with it off. More average advance and lower EGTs and on a hybrid every little helps and it does..

I will try it

this map, KFMDBGRG, is all FF in a 8D0907551G definition i have. rpm also goes 2400, 4800, 7200, 9600.
same for the 4b0906018ch file im looking in.
is this correct?

Yes, mine is the same .. In my case ff equals 100.1

but why such the high rpm values? and also, couldnt i just change them to whatever i wanted?

Can't answer that sorry,  but will be trying it tomorrow!

One thing I've learnt is just cos its in the map ie your rpm @ 9600 doesn't mean it's right...

Something is screwed up if your having torque intervention problems.

My bet is KFMIOP or maybe KFPED, most likely the first one.

I never said I was having torque intervention problems. I simply stated with it off you can get better results! Which is true...

If you're not having torque intervention problems, then it will have no affect.

Either you're experiencing torque intervention and zwist = zwsol, or you're not and zwist = zwbas.

What happens when you hit the rev limit...

You have disabled the ECU's means of instant torque reduction.

NMAX, VMAX, ASR, MSR, gear shift, engine speed synch, idle speed...

You have no ill effects?

This.  if you have no intervention then it won't drive any better.  If you have, then something isn't tuned quite right.

Rick

Could this gear dependant boost not be implemented into switchable maps??
Not had a chance to try it out yet but first and second gear sure will gain from this didn't realise it was so simple

6 x TVLDMX or KFLDRL maps linked to selected gear, but can also be devativated by driver on demand.  Perfect for hybrid/BT setups and the wet winter months. 

how does the ECU know which gear you are in if your car is manual??? On my '02GTI 1.8t AWP HS box/o2j tranns there are no sensors going to the tranny except for the reverse light nor sensors connected to the gear shifter inside the car. Please explain.

Variable "Gangi"

Ecu knows in which gear it works by calculating torque/load

function BBGANG

Pardon?

Well, I didn't meant to say actual torque, but ecu detects gear by checking speed vs rpm in given limits

Basically it is RPM/SPEED = LIMIT (upper/lower)

thanks Masterj.

May need to change NVQUOT-- if change box/ratios
But if use VCDS and meas blocks notice picks up each gear very quickly

Good to know as I have the parts in my shed to put together an 02j trans with a 4.23 ring and Eurospecsport close ratio gear set with .81 5th. just need to do it ha!

Which measuring block number/s or you talking about. I would like to see this for myself!

Thank you for your input Vdub-dub!

Seems pointless to leave the post I did to start a thread that had already been started. so its cleaned up even more now. wow the words can glow...this is about useless but for some reason entertaining. I guess it's the simple things...lol

im thinking there already a thread about this and map for it as well.

Theres a topic in the reverse engineering section (i think) that discusses this.   map selection ;)

There's numerous threads on this topic.

Use MDBGRGA not KFMDBGRG, unless you like wonky timing

I was going to link him to it until I noticed he was posting in there, so obviously aware of it.

I totally forgot about this thread...thanks for moving mine over to it.

Can anyone answer my question to Vdub about the measuring blocks in VCDS? I checked the Ross-Tech site and didn't find anything about this.

edited because it was no longer valid.

When first time looked at MDBGRG definition I thought there should be no difference between influence of these two tables to timing.
Then I've noticed mibgr_w which goes from KFMDBGRG into MDKOG function.
Is this the reason why KFMDBGRG table is not preferrable? How exactly does it change timing, just reduces when it hits the limit?

When I tried it I ended up with very crippled timing... it was very low.
So now I'm going to use MDBGRGA

check

Alfa Romeo 1.8TBi 200hp file and you will see how Bosch makes boost per gear
Also in 207 1.6THP there is the 2nd gear torque limiter, you can learn from this also

It is an excellent feature that Bosch includes in Motronic software but requires a perfect calibrated torque model and not the
300% IRL - 100% IOP - 300% LDRXN