ZERO SPORTS Impreza WRX STI Type RA BTZ003 N1 315HP FITT version
Tuned for FITT STi vs Evo Battle Royal
Comfort Soft to Sports Hard
CAR : Subaru Impreza Sedan WRX STI Version V '98
Tire : Comfort Soft to Sports Hard
Specs
Horsepower: 315 HP at 6400 RPM
Torque: 311.6 ft-lb at 4000 RPM
Power Limiter at : 98.5%
Weight: 1150 kg
Ballast : 0 kg
Ballast Position : 0
Weight Distribution : 54 / 46 as stock
Performance Points:
483
GT AUTO
NO Oil change
Improve Body Rigidity (
NOT INSTALLED in this build ) to comply with the rules.
Wheels : Standard Size or + 1 Inch Up - BOYD CODDINGTON Wheels Legacy F-09 painted in white or ADVAN RGII in Gold - +1 inch up ADVAN RGII in gold is used
Rear Wing - No Wing
Car Paint : Pure White
Tuning Parts Installed :
Intake Tuning
Low RPM Range Turbo Kit
Suspension Fully Customizable Kit
Adjustable LSD
Twin Plate Clutch Kit
Weight Reduction Stage 1
Carbon Hood ( Body Color )
Driver Controlled Center Differential ( DCCD ) - stock part.
Five Speed Transmission
LSD ( ZERO SPORTS GT 1.5 way rear and front - low optimal preload )
FRONT - GT ZLF 101
Initial Torque : 24
Acceleration Sensitivity: 30
Braking Sensitivity: 15
REAR - GT ZLR302 (R180)
Initial Torque : 13
Acceleration Sensitivity: 30
Braking Sensitivity: 15
Driver Controlled Center Differential
FRONT/REAR = 35/65 ( STOCK )
Suspension - ZERO SPORTS WINNING R N1 spec Coil Over Kit
Front, Rear
Ride Height: 105 105
Spring Rate: 11.00 7.00
Dampers (Compression): 5 4
Dampers (Extension): 6 5
Anti-Roll Bars: 2 3
Camber Angle: 0.2 0.3
Toe Angle: -0.08 0.08
Brake Balance:
7/9 ( personal BB) or for ABS 0 wheel : 7/9, for ABS 1 7/9 or feel free to use your preferred brake balance.
Recommended setting for DS3 user :
Steering sensitivity at +1 or +2, all aids off, except ABS 1 ( if not comfortable with ABS 0 ) with 7/9 brake balance as starting point.
Notes :
Based on the Zero Sports BTZ003 N1 replica that I built a few months ago, this is the entry car for Spec Street FITT STi vs Evo Battle Royal event.
There are several changes needed to comply with the rules, the car has no body rigidity and no oil change. Power and weight also has been altered to fit within the rules. Weight distribution has been left stock to avoid using any ballast, the original replica has 57/43.
Gearing has been changed to 5 speed preset as per rule, the replica has corrected stock 5 speed ratio.
For LSD, the setup has been retained from the replica, while the suspension, damper has been tweaked for the wet Tsukuba, ARB and toe also has been tweaked for wet surface. Camber set at low value, I just like the way it drives with a bit lower grip limit.
When tested at Tsukuba Wet 40% water on CS, it's capable of low 1:04s easily, my best was high 1:03s, a mid 1:03s is possible. My best 1st sector is 14.9s, the high 1:03s lap has 15.2s 1st sector and last sector is slower by a few tenths as well as a bit slow last corner. Some handbrake / E brake use is highly recommended in the wet Tsukuba, particularly 1st corner, and last 2nd hairpin before the main straight - apply only a split second to help the rear rotate when necessary Tsuchiya style 
The WRX is a bit hard to drive in the wet, just like in real life, some understeer might creep in when not careful while braking and exit oversteer when getting too excited with the go pedal - had my share sideways with a Rex in the rain IRL.
At Grand Valley East, still on CS tire, it managed 1:12s with ease. With SH, it should be below 1:10s.
For Tsukuba : CS tire, and for GVE : SH tire. No tune changes.
I have provided below both best lap replays for the Tsukuba and GVE, both are on CS tire, Tsukuba 1:03s and GVE 1:12s, might be useful for reference or just for your enjoyment. It might be interesting to load them on data logger to compare with your best lap
. I never got that low but believe it is possible, best for me 1:19.218.
.............
I used them on replicas and a racing series in GTP that I work with also uses cars with flat floor to help with performance / lap time. It's bad when PP is involved, but when PP is not an important, flat floor is very useful, it made road cars perform like race cars given enough power ( above 500HP )
I do use camber, but not for getting best possible lap time or grip 
.
