Once again it's me I'm writing here at RD forum instead of official AC cause i got ban there since i've posted screenshots of my modified R34...anyway i was able to jump over limitless problems such as tyres 
now it's time to tune a suspension - i'd like to mark that i don't wanna create a ultimate handling machine ... i just want to increase a stiffness and cornering a little bit - and somehow compensate the natural R34 understeer
[HEADER]
VERSION=2
[BASIC]
WHEELBASE=2.665 ; Wheelbase distance in meters
CG_LOCATION=0.57 ; Front Weight distribution in percentage
[ARB]
FRONT=49214 ; Front antiroll bar stiffness. in Nm
REAR=13200 ; Rear antiroll bar stiffness. in Nm
ok so i changed front ARB stiffness from 29214 to 49214 Nm, rear one is stock
[FRONT]
TYPE=DWB
BASEY=-0.200 ; Distance of CG from the center of the wheel in meters. Rear Wheel Radius+BASEY=Rear CoG Actual CG height =(FWR+FBasey)+(RWR+Rbasey))/CG_LOCATION%
TRACK=1.480
ROD_LENGTH=0.120
HUB_MASS=57.5
RIM_OFFSET=0.030
WBCAR_TOP_FRONT=0.38995, 0.3845, 0.09135
WBCAR_TOP_REAR=0.39595, 0.3885, -0.13765
WBCAR_BOTTOM_FRONT=0.44595, -0.1435, 0.01435
WBCAR_BOTTOM_REAR=0.44995, -0.1435, -0.34965
WBTYRE_TOP=0.2005, 0.41825, -0.043160
WBTYRE_BOTTOM=0.11121, -0.11753, 0.01839
WBCAR_STEER=0.42095, -0.11127, -0.1468
WBTYRE_STEER=0.13095, -0.08929, -0.1315
TOE_OUT=0.00030 ; Toe-out expressed as the length of the steering arm in meters
STATIC_CAMBER=-0.60 ; Static Camber in degrees. Actual camber relative to suspension geometry and movement, check values in game
SPRING_RATE=40000 ; Wheel rate stiffness in Nm. Do not use spring value but calculate wheel rate
PROGRESSIVE_SPRING_RATE=0 ; progressive spring rate in N/m/m
BUMP_STOP_RATE=80000 ; bump stop spring rate
BUMPSTOP_UP=0.060 ; meters to upper bumpstop from the 0 design of the suspension
BUMPSTOP_DN=0.050 ; meters to bottom bumpstop from the 0 design of the suspension
PACKER_RANGE=0.120 ; Total suspension movement range, before hitting packers
DAMP_BUMP=3597 ; Damper wheel rate stiffness in N sec/m in slow speed compression
DAMP_FAST_BUMP=1978.4 ; Damper wheel rate stiffness in N sec/m in fast speed compression
DAMP_FAST_BUMPTHRESHOLD=0.080 ; Damper bump slow/fast threshold in seconds
DAMP_REBOUND=8730.9 ; Damper wheel rate stiffness in N sec/m in slow speed rebound
DAMP_FAST_REBOUND=4452.8 ; Damper wheel rate stiffness in N sec/m in fast speed rebound
DAMP_FAST_REBOUNDTHRESHOLD=0.110 ; Damper rebound slow/fast threshold in seconds
[REAR]
TYPE=DWB
BASEY=-0.236 ; Distance of CG from the center of the wheel in meters. Rear Wheel Radius+BASEY=Rear CoG Actual CG height =(FWR+FBasey)+(RWR+Rbasey))/CG_LOCATION%
TRACK=1.490
ROD_LENGTH=0.015
HUB_MASS=55.5
RIM_OFFSET=0.030
WBCAR_TOP_FRONT=0.3056, 0.1197, 0.170
WBCAR_TOP_REAR=0.40223, 0.13956, -0.050
WBCAR_BOTTOM_FRONT=0.3050, -0.0768, 0.370
WBCAR_BOTTOM_REAR=0.4302, -0.04995, 0.010
WBTYRE_TOP=0.1015, 0.1325, 0.005
WBTYRE_BOTTOM=0.1223, -0.100, 0.00
WBCAR_STEER=0.5496, -0.005, -0.180
WBTYRE_STEER=0.2112, -0.04995, -0.180 ; Steering rod tyre side attach point
TOE_OUT=0.0000 ; Toe-out expressed as the length of the steering arm in meters
STATIC_CAMBER=1.0 ; Static Camber in degrees. Actual camber relative to suspension geometry and movement, check values in game
SPRING_RATE=45000 ; Wheel rate stiffness in Nm. Do not use spring value but calculate wheel rate
PROGRESSIVE_SPRING_RATE=0 ; progressive spring rate in N/m/m
BUMP_STOP_RATE=100000 ; bump stop spring rate
BUMPSTOP_UP=0.075 ; meters to upper bumpstop from the 0 design of the suspension
BUMPSTOP_DN=0.060 ; meters to bottom bumpstop from the 0 design of the suspension
PACKER_RANGE=0.110 ; Total suspension movement range, before hitting packers
DAMP_BUMP=2517.9 ; Damper wheel rate stiffness in N sec/m in slow speed compression
DAMP_FAST_BUMP=1510.7 ; Damper wheel rate stiffness in N sec/m in fast speed compression
DAMP_FAST_BUMPTHRESHOLD=0.080 ; Damper bump slow/fast threshold in seconds
DAMP_REBOUND=4087.5 ; Damper wheel rate stiffness in N sec/m in slow speed rebound
DAMP_FAST_REBOUND=2656.9 ; Damper wheel rate stiffness in N sec/m in fast speed rebound
DAMP_FAST_REBOUNDTHRESHOLD=0.110
[GRAPHICS_OFFSETS]
WHEEL_LF=0.015 ;Left front graphical offset of the wheel positioning in the x axis (width). + is left - is right movement
SUSP_LF=0.015 ;Left front graphical offset of the suspension positioning in the x axis (width). + is left - is right movement
WHEEL_RF=-0.015 ; Right front as above
SUSP_RF=-0.015 ; Right front as above
WHEEL_LR=0.015 ; Left rear as above
SUSP_LR=0.015 ; Left rear as above
WHEEL_RR=-0.015 ; Right rear as above
SUSP_RR=-0.015 ; Right rear as above
[DAMAGE]
MIN_VELOCITY=40 ; MINUMUM VELOCITY TO START TAKING DAMAGE
GAIN=0.0004 ; AMOUNT OF STEER ROD DEFLECTION FOR IMPACT KMH
MAX_DAMAGE=0.05 ; MAXIMUM AMOUNT OF STEER ROD DEFLECTION ALLOWED
DEBUG_LOG=1 ; ACTIVATES DAMAGE DEBUG IN THE LOG
I do not know how much i should increase those values i read this guide http://www.racedepartment.com/threads/assetto-corsa-car-setup-guides.99049/
but still I'm sluggish and lacking of knowledge
now it's time to tune a suspension - i'd like to mark that i don't wanna create a ultimate handling machine ... i just want to increase a stiffness and cornering a little bit - and somehow compensate the natural R34 understeer[HEADER]
VERSION=2
[BASIC]
WHEELBASE=2.665 ; Wheelbase distance in meters
CG_LOCATION=0.57 ; Front Weight distribution in percentage
[ARB]
FRONT=49214 ; Front antiroll bar stiffness. in Nm
REAR=13200 ; Rear antiroll bar stiffness. in Nm
ok so i changed front ARB stiffness from 29214 to 49214 Nm, rear one is stock
[FRONT]
TYPE=DWB
BASEY=-0.200 ; Distance of CG from the center of the wheel in meters. Rear Wheel Radius+BASEY=Rear CoG Actual CG height =(FWR+FBasey)+(RWR+Rbasey))/CG_LOCATION%
TRACK=1.480
ROD_LENGTH=0.120
HUB_MASS=57.5
RIM_OFFSET=0.030
WBCAR_TOP_FRONT=0.38995, 0.3845, 0.09135
WBCAR_TOP_REAR=0.39595, 0.3885, -0.13765
WBCAR_BOTTOM_FRONT=0.44595, -0.1435, 0.01435
WBCAR_BOTTOM_REAR=0.44995, -0.1435, -0.34965
WBTYRE_TOP=0.2005, 0.41825, -0.043160
WBTYRE_BOTTOM=0.11121, -0.11753, 0.01839
WBCAR_STEER=0.42095, -0.11127, -0.1468
WBTYRE_STEER=0.13095, -0.08929, -0.1315
TOE_OUT=0.00030 ; Toe-out expressed as the length of the steering arm in meters
STATIC_CAMBER=-0.60 ; Static Camber in degrees. Actual camber relative to suspension geometry and movement, check values in game
SPRING_RATE=40000 ; Wheel rate stiffness in Nm. Do not use spring value but calculate wheel rate
PROGRESSIVE_SPRING_RATE=0 ; progressive spring rate in N/m/m
BUMP_STOP_RATE=80000 ; bump stop spring rate
BUMPSTOP_UP=0.060 ; meters to upper bumpstop from the 0 design of the suspension
BUMPSTOP_DN=0.050 ; meters to bottom bumpstop from the 0 design of the suspension
PACKER_RANGE=0.120 ; Total suspension movement range, before hitting packers
DAMP_BUMP=3597 ; Damper wheel rate stiffness in N sec/m in slow speed compression
DAMP_FAST_BUMP=1978.4 ; Damper wheel rate stiffness in N sec/m in fast speed compression
DAMP_FAST_BUMPTHRESHOLD=0.080 ; Damper bump slow/fast threshold in seconds
DAMP_REBOUND=8730.9 ; Damper wheel rate stiffness in N sec/m in slow speed rebound
DAMP_FAST_REBOUND=4452.8 ; Damper wheel rate stiffness in N sec/m in fast speed rebound
DAMP_FAST_REBOUNDTHRESHOLD=0.110 ; Damper rebound slow/fast threshold in seconds
[REAR]
TYPE=DWB
BASEY=-0.236 ; Distance of CG from the center of the wheel in meters. Rear Wheel Radius+BASEY=Rear CoG Actual CG height =(FWR+FBasey)+(RWR+Rbasey))/CG_LOCATION%
TRACK=1.490
ROD_LENGTH=0.015
HUB_MASS=55.5
RIM_OFFSET=0.030
WBCAR_TOP_FRONT=0.3056, 0.1197, 0.170
WBCAR_TOP_REAR=0.40223, 0.13956, -0.050
WBCAR_BOTTOM_FRONT=0.3050, -0.0768, 0.370
WBCAR_BOTTOM_REAR=0.4302, -0.04995, 0.010
WBTYRE_TOP=0.1015, 0.1325, 0.005
WBTYRE_BOTTOM=0.1223, -0.100, 0.00
WBCAR_STEER=0.5496, -0.005, -0.180
WBTYRE_STEER=0.2112, -0.04995, -0.180 ; Steering rod tyre side attach point
TOE_OUT=0.0000 ; Toe-out expressed as the length of the steering arm in meters
STATIC_CAMBER=1.0 ; Static Camber in degrees. Actual camber relative to suspension geometry and movement, check values in game
SPRING_RATE=45000 ; Wheel rate stiffness in Nm. Do not use spring value but calculate wheel rate
PROGRESSIVE_SPRING_RATE=0 ; progressive spring rate in N/m/m
BUMP_STOP_RATE=100000 ; bump stop spring rate
BUMPSTOP_UP=0.075 ; meters to upper bumpstop from the 0 design of the suspension
BUMPSTOP_DN=0.060 ; meters to bottom bumpstop from the 0 design of the suspension
PACKER_RANGE=0.110 ; Total suspension movement range, before hitting packers
DAMP_BUMP=2517.9 ; Damper wheel rate stiffness in N sec/m in slow speed compression
DAMP_FAST_BUMP=1510.7 ; Damper wheel rate stiffness in N sec/m in fast speed compression
DAMP_FAST_BUMPTHRESHOLD=0.080 ; Damper bump slow/fast threshold in seconds
DAMP_REBOUND=4087.5 ; Damper wheel rate stiffness in N sec/m in slow speed rebound
DAMP_FAST_REBOUND=2656.9 ; Damper wheel rate stiffness in N sec/m in fast speed rebound
DAMP_FAST_REBOUNDTHRESHOLD=0.110
[GRAPHICS_OFFSETS]
WHEEL_LF=0.015 ;Left front graphical offset of the wheel positioning in the x axis (width). + is left - is right movement
SUSP_LF=0.015 ;Left front graphical offset of the suspension positioning in the x axis (width). + is left - is right movement
WHEEL_RF=-0.015 ; Right front as above
SUSP_RF=-0.015 ; Right front as above
WHEEL_LR=0.015 ; Left rear as above
SUSP_LR=0.015 ; Left rear as above
WHEEL_RR=-0.015 ; Right rear as above
SUSP_RR=-0.015 ; Right rear as above
[DAMAGE]
MIN_VELOCITY=40 ; MINUMUM VELOCITY TO START TAKING DAMAGE
GAIN=0.0004 ; AMOUNT OF STEER ROD DEFLECTION FOR IMPACT KMH
MAX_DAMAGE=0.05 ; MAXIMUM AMOUNT OF STEER ROD DEFLECTION ALLOWED
DEBUG_LOG=1 ; ACTIVATES DAMAGE DEBUG IN THE LOG
I do not know how much i should increase those values i read this guide http://www.racedepartment.com/threads/assetto-corsa-car-setup-guides.99049/
but still I'm sluggish and lacking of knowledge
