I have decided to share this with all of you, if anyone is willing could you try this out and tell me what you think of it, i intend to set this up for hakone downhill on record challenge.

1214 kg 448PS

S engine part a akp lvl 5, part b hrm lvl 5, part c normal
Turbo tune normal
Intercooler normal
Turbine normal
Air cleaner normal
S muffler normal
Cooling module normal
Rom normal
Transmission lvl 5
Clutch lvl 5
Lsd 2 way lvl 2
Suspension lvl 5
Brake lvl 5
Weight down lvl 5
Racing lvl 5
Carbon bonnet normal
Carbon trunklid normal
Full aero
Gt wing type 1

Gear ratio final 3.640
Initial torque default
Lsd ratio default
Spring rate front 4 rear 2
Damper front 4 rear 2
Stabilizer front -4 rear -2
Ride height -18 front and rear
Toe front 2 rear 3
Camber -200 front and rear
Brake effect front 6 rear 5
Wing angle 2
Steering angle 2
Tcs 0
Abs 2

maybe try more wing angle for less wheel spin and more accel in corners.

I found this setup to be too understeery, and looking over some of your settings I got some red flags as to why that might be.

First off, I don't like having the front suspension to be too hard or it will hit road bumps and leave the road surface - killing your steering. I like the fast rebound you had on the front and softened it a little. I took your 4:2 setup and went with:

Spring rate: +2 (Front), +3 (Rear)
Damper: +3 (Front), +2 (Rear)

I removed the stabilizer settings to focus on the shocks/springs and found the car to work fine for me without messing with them so they stayed as default settings.

Stabilizer: 0 (Front), 0 (Rear)
Ride Height: -18 (Front), -18 (Rear)

The second thing that caught my attention was your toe settings. For better cornering with an rear-wheel drive car you will want negative toe in the front, and neutral/positive in the rear. I took your positive front and made it negative, and reduced the positive to the rear. You may want to kick my rear value up one if you want a bit more steering response.

Toe: -2 (Front), 1 (Rear)

The last thing was the camber.... you have waaaay too much for a grip car. That kind of camber is like trying to make a VIP-styled car run time attack - it just won't work well. I always start conservative and slowly raise/lower the value. These are the values that I thought were a good start.

Camber: -0.15 (Front), -0.15 (Rear)

I would read up on my Drift Tuning Guide for some tips on adjusting settings, but hopefully this will help you in the right direction.

Ok thanks i will make sure i try this out.

sounds nice, i'v been trying to tune my 891hp supra. Only problem i have is having a hard time to slow down to use my grip set-up lol

i tried a supra on hakone, probably too much power, had bout 750hp, couldnt get below 2'05''xxx

the thing suprisingly handles sharp 180deg turns at 45-65mph. it's just having a hard time slowing down from the straight to get to 65. lol, can even faint on some turns... can't wait for the stage 5 brakes