NefMoto > Technical > Tuning > gear dependant boost
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Author Topic: gear dependant boost  (Read 34690 times)
Vdub-dub
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« on: December 02, 2012, 01:25:34 PM »
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 Huh could be a big thing for us big(ish) power FWD boys
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ddillenger
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« Reply #1 on: December 02, 2012, 01:58:41 PM »
Do me7 equipped cars have the necessary hardware to implement this?
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Vdub-dub
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« Reply #2 on: December 02, 2012, 02:06:55 PM »
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?
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prj
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« Reply #3 on: December 02, 2012, 03:10:17 PM »
You can easily just switch LDRXN based on gear for example.
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phila_dot
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« Reply #4 on: December 02, 2012, 06:00:21 PM »
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.
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dera
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« Reply #5 on: December 02, 2012, 06:32:09 PM »
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).
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fredrik_a
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« Reply #6 on: December 03, 2012, 08:20:14 AM »
Quote from: dera on December 02, 2012, 06:32:09 PM
No need for magic tricks, ME7 has a map for gear dependant torque limiter

This is enabled for all Volvo ME7's also. It's set between 0 to 100% on each gear.
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phila_dot
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« Reply #7 on: December 03, 2012, 08:30:09 PM »
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.
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Vdub-dub
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« Reply #8 on: December 05, 2012, 09:53:29 AM »
Quote from: phila_dot on December 03, 2012, 08:30:09 PM
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
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rnagy86
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« Reply #9 on: December 05, 2012, 10:04:45 AM »
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.

Quote from: Vdub-dub on December 05, 2012, 09:53:29 AM
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
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littco
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« Reply #10 on: December 05, 2012, 11:06:19 AM »
I assume if you have TM switched off this wont work?
« Last Edit: December 05, 2012, 11:09:35 AM by littco » Logged
phila_dot
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« Reply #11 on: December 05, 2012, 11:45:12 AM »
Quote from: littco on December 05, 2012, 11:06:19 AM
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.
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littco
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« Reply #12 on: December 05, 2012, 12:26:47 PM »
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
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k0mpresd
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« Reply #13 on: December 05, 2012, 01:17:46 PM »
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?
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littco
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« Reply #14 on: December 05, 2012, 01:30:07 PM »
Yes, mine is the same .. In my case ff equals 100.1
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