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Once again I'm asking for Your help

Discussion in 'Assetto Corsa' started by Grabarz, Feb 26, 2017.

  1. Grabarz

    Grabarz

    Messages:
    64
    Ratings:
    +11
    Hello there i decided to create Nismo Z-Tune version of R34 GTR for my own offline races
    stock R34 should be about 1600kg, AWD, 2.6L L6 twin turbo engine, "276 HP (206 kW) @ 6800 rpm and 260 lb·ft (353 Nm) @ 4400 rpm. By the end of production, power levels had gone up to around 276 HP (206 kW) @ 6800 rpm and 289 lb·ft (392 Nm) @ 4400 rpm"- wiki

    Other source: L6, 332 PS (244 kW, 392 Nm) (advertised as 276)

    In game Nissan is V-spec version has 325 HP and 392 Nm of torque - Vspec version is just different aero parts ...

    however real Godzilla has been build in just 20 specimen they call it Z-tune
    http://www.nismo.co.jp/Z-tune/contents_e.html

    368KW (500 HP), 540 Nm of torque 1600 kg of weight - and here it comes

    I'm trying to figure it our how power settings are working in AC
    there are 2 files that i found: Power.lut and Power_ORl.lut

    Power.lut:
    0|125
    500|125
    1000|130
    1500|155
    2000|172
    2500|200
    3000|206
    3500|230
    4000|227
    4500|223
    5000|228
    5500|225
    6000|222
    6420|211
    7000|190
    7500|173
    8000|165
    8500|106
    9000|0
    I Can't figure it out what are those values Kilo Watts ? Horse Power?, Wheel Horse Power?, Torque ?

    Power_ORl.lut:
    -3000|100
    -250|100
    0|100
    500|120
    1000|124
    1500|129
    2000|197
    2500|238
    3000|281
    3500|306
    3750|310
    4000|304
    4500|300
    5000|302
    5500|288
    6000|280
    6500|274
    6700|267
    6800|264
    7000|256
    7250|246
    7500|213
    8000|0
    Same its more similar to Torque curve but still it lacks of torque...

    Second problem lies into tyres ....
    Z-tune had 265mm wide tires meanwhile stock/vspec/vspecII had 245mm wide ...
    I'm trying to create a little bit more sticky tires for that version however my lack of skills and language barrier

    WIDTH=0.245
    RADIUS=0.3266 ; tyre radius in meters
    RIM_RADIUS=0.254 ; rim radius in meters (use 1 inch more than nominal)
    ANGULAR_INERTIA=1.62 ; angular inertia of front rim+tyre+brake disc together
    DAMP=500 ; Damping rate of front tyre in N sec/m (values usualy from 200 to 1400)
    RATE=358000 ; Spring rate of front tyres in Nm
    DY0=1.2798
    DY1=-0.050
    DX0=1.2368
    DX1=-0.046
    WEAR_CURVE=street_front.lut ; file with lookup table to call
    SPEED_SENSITIVITY=0.002563 ; speed sensitivity value
    RELAXATION_LENGTH=0.0739
    ROLLING_RESISTANCE_0=12 ; rolling resistance constant component
    ROLLING_RESISTANCE_1=0.000505 ; rolling resistance velocity (squared) component
    ROLLING_RESISTANCE_SLIP=5248 ; rolling reistance slip angle component
    FLEX=0.000679 ; tire profile flex. the bigger the number the bigger the flex, the bigger the added slipangle with load.
    CAMBER_GAIN=0.158 ; Camber gain value as slipangle multiplayer. default 1
    DCAMBER_0=1.1
    DCAMBER_1=-13 ; D dependency on camber. D=D*(1.0 - (camberRAD*DCAMBER_0 + camberRAD^2 * DCAMBER_1)) , camberRAD=absolute value of camber in radians
    FRICTION_LIMIT_ANGLE=8.1 ; Friction limit angle.
    XMU=0.28
    PRESSURE_STATIC=35 ; STATIC (COLD) PRESSURE
    PRESSURE_SPRING_GAIN=10200 ; INCREASE IN N/m per psi (from 26psi reference)
    PRESSURE_FLEX_GAIN=0.6 ; INCREASE IN FLEX per psi
    PRESSURE_RR_GAIN=1 ; INCREASE IN RR RESISTENCE per psi
    PRESSURE_D_GAIN=0.006 ;loss of tyre footprint with pressure rise.
    PRESSURE_IDEAL=40 ;Ideal pressure for grip
    FZ0=3208
    LS_EXPY=0.89
    LS_EXPX=0.89
    DX_REF=1.20
    DY_REF=1.20
    FLEX_GAIN=0.183
    FALLOFF_LEVEL=0.87
    FALLOFF_SPEED=4

    Which value i should change to get more sticky tyres
    P.S i tried to change width :)

    Can You guys tutor me?
     
  2. ltcars

    ltcars

    Messages:
    623
    Ratings:
    +301
    The Power.lut gives the torque values.
     
  3. Terra21

    Terra21
    Premium

    Messages:
    273
    Ratings:
    +649
  4. Stereo

    Stereo

    Messages:
    2,408
    Ratings:
    +1,457
    Yeah, in newton-metres at the wheel (so less than almost any manufacturer quotes since they like crank power)