Ferrari 458 Italia GT3 VLN SP9 Class Replica
Tuned to replicate Ferrari 458 Italia GT3 560PP ( VLN SP9 )
Sports Soft to Racing Hard
CAR : Ferrari 458 Italia '09
Tire : Sports Soft to Racing Hard
Specs
Horsepower: 513 HP / 520PS at 7200 RPM
Torque : 406.5 ft-lb at 6000 RPM
Power Limiter at : 89.5%
Weight: 1300 kg
Ballast : 83 kg
Ballast Position : 22
Weight Distribution : 42 / 58 - as in real life spec
Performance Points:
560
GT AUTO
NO Oil change
Improve Body Rigidity (
INSTALLED IN THIS BUILD ) -
MANDATORY as the real 458 GT3 has welded roll cage and chassis reinforcements, as well necessary for racing tire fitment.
Aero Kit Type A
Rear Wing - Generic Wing Type B
OR
Custom Rear Wing :
Wing Mount Standard Type D
Wing Large Type B
Winglets Type C
Height +10 and Width +32
Wheels : Standard Size OZ Racing Superfogiata / BBS LM-R / ENKEI RS05RR / RAYS 57Xtreme in Light Red Matte or Dark Grey or Black or Silver
Car Paint : Rosso Corsa
Tuning Parts Installed :
Isometric Exhaust Manifold
Triple Plate Clutch
Fully Customizable Dog Clutch Transmission
Adjustable LSD
Fully Customizable Suspension
Racing Brakes Kit
Weigh Reduction Stage 3
Carbon Hood ( Body Color )
Window Weight Reduction
Suspension -INTRAX BLACK TITAN ARC 4 Way Damper with EIBACH ERS Springs
Front, Rear
Ride Height: 77 77
Spring Rate: 16.67 11.49
Dampers (Compression): 5 8
Dampers (Extension): 6 8
Anti-Roll Bars: 4 4
Camber Angle: 0.2 0.2 ( use zero camber all around for max grip )
Toe Angle: -0.07 0.07
LSD - 2 Way Ferrari E-Differential
Initial Torque : 28
Acceleration Sensitivity: 45
Braking Sensitivity: 45
DOG CLUTCH TRANSMISSION - HEWLAND Racing Sequential 6 Speed with Homologated ratios
Install all power parts
Set Default
Set Final to 5.700
Set Auto Max Speed at 250kmh / 155mph
Adjust each gear :
1st 2.846
2nd 2.235
3rd 1.765
4th 1.474
5th 1.238
6th 1.037
7th 0.898 ( IGNORE THIS )
Set Final : 3.889 ( Adjust to track if necessary, for example Bathurst works great on 3.725 )
AERO
FRONT : 100 ( FIXED )
REAR : 220 ( MAX )
Brake Balance:
5/3 ( personal BB) or for ABS 0 wheel : 4/3, for ABS 1 - feel free to use your preferred brake balance. I recommend to run 6/4 for ABS 1 or 1 click higher at the front.
Recommended setting for DS3 user :
Steering sensitivity at +1 or +2, all aids off, except ABS 1 ( if not comfortable with ABS 0 ) with 6/4 brake balance as starting point.
Notes :
It all started with a message from a fellow member Danbojte 
Then I saw the red car in action at the track ( a picture of it 
) and I realized I have the car in the garage, sitting there in stock form with over 200km from lapping Bathurst.
The Ferrari 458 Italia GT3 was born 
It's a loosely based on real life car, not a full replica so to speak, as detailed information are hard to find, but I do have some of the most important information at hand. I spent a good hour or so to find the needed information, and tuning/testing around 2 hours
First is power and weight, there are many level of power and weight for this car, due to various competition rules and balancing purposes. This build is a VLN SP9 class 458 GT3, it's balanced in performance for VLN event regulation. Power is at 520PS or 513HP with 550Nm/405lb-ft of torque and 1300kg. To achieve the torque, I have to use isometric exhaust manifold to bring the torque up at 406.5
I scoured the net for technical information of 458 GT3, I found some that I used here.
Suspension is based on INTRAX Black Titan ARC ( Anti Roll Control ) 4 Way Damper, a great damper kit that received great praise when tested on a 458 GT3 at Spa Francorchamps. Springs are EIBACH ERS, with a set of 3 options front and back :
Front
120-60-280 N/mm
120-60-300 N/mm - Installed
120-60-320 N/mm
Rear
170-60-180 N/mm
170-60-200 N/mm - Installed
170-60-220 N/mm
As these springs rate are way too high and not available in GT6, I used the middle range ratio 300/200 and adapt it on GT6, the front are 1.5 times harder than rear. I used 16.67kg front and 11.49kg rear and it works so well. With damper setup to maintain excellent traction in all conditions, entry, mid corner, or exits, you name it, this 458 GT3 does it well.
For transmission, the real car uses HEWLAND 6 speed gearbox, I managed to get rare information on the homologated gearing. Not sure if the final is fixed in real life, but in GT6 you are free to lower the final for higher top speed. The homologated gearing is setup to take advantage of the 458 GT3 engine peak power and torque, shift point is at 8700rpm ( 1st shift light ) and usable range from 7500-9000rpm. Again, real life spec works wonder in GT6, spot on !! Ignore the 7th gear for the sake of authenticity, if you find the car hitting the limiter on 6th, lower the final, I would recommend 3.725 for Bathurst ( 310+kmh top speed at conrod )
LSD, the real Ferrari 458 uses E-Diff, I read that it uses 2 way with capability to reduce locking rate under braking 
So, I fine tuned the LSD in GT6, using high preload commonly used on racing cars, and high locking rate on accel and brake. The value has been optimzed, a click up or down of value would give substantial changes Higher gives better traction and response at a cost of tightness, while lower will give more freedom of movement. I set both at 45, this is perfect for most situation. You can fine tune the 458 GT3 behavior just by using LSD - rough guide :
Static initial/preload at 28.
accel 48 / brake 45 ( neutral entry, very tight mid corner to exit )
accel 47 / brake 45 ( neutral entry, tight mid corner to exit )
accel 46 / brake 45 ( neutral entry, moderate mid corner to exit )
----accel 45 / brake 45 ( neutral all around - used on the tune )
accel 45 / brake 48 ( very tight entry, neutral mid corner to exit )
accel 44 / brake 44 ( slightly loose entry, slightly loose mid corner to exit ) - running lower will make the car more loose.
The tuning and testing process was done at Tsukuba, Brands Hatch GP, Silverstone GP, and Bathurst.
This Ferrari 458 GT3 is very quick at 560PP, with it's deficit in aero/down force, it excels in mechanical grip, balance, traction and acceleration even on higher speed region Red makes it even faster
ENJOY 
Update : Added optional custom rear wing + wheels selection and detailed spring rate value under notes.
, looking at the weekly rewind, OMG, the Maserati MC Trofeo is nominated for the tune of the week, thanks again to @danbojte 
I'll have to play more with her. 
I appreciate you telling me what to do though
...as if the there was not weight up front, which is odd considering it a front engine car.
