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After some continued testing with the track set up I put together a little set up that I am finding to be the best of what is possible with the N52.
Do to the rev limits of the N52 and power band I have swapped out the differential gearing up to a 3.91 ratio. This will increase the lower end and 5th gear power.
Headers, straight pipe and exhaust cans "Supersprint" is one of the few brands who offers this.
Epic does have a tune for the N52, The guys at Bimmerworld can get you a set up.
JB Lightweight Flywheel with a Sacs clutch is about the only option unless you are wanting a race clutch.
Because I have been building this car for endurance racing, I have included the full list of mods added for this build.
Chassis 2006 BMW Z4 E86 30.si $10,000.00
MCS 1 way dampers $2,750.00
Ground Control Sway Bar Kit $699.99
Ground Control Coilover Kit $839.99
Ground Control Camber Plates $419.99
AKG Lower Rear Lower Control Arms $280.00
"SyncroDesignWorks
RTAB's, Rear trailing arm bearings" $265.00
Solid Inner and Outer bearings $150.00
AKG Rear Shock Mount Set Aluminum – Spherical Bearings 12mm $150.00
AKG - Differential Mount Bushings, Poly 75D – BMW E46, Z4 (Non-M) $140.00
Welded in strut tower reinforcements $500.00
AKG - Front Control Arm Bushing Set (66 Mm), Poly 75D $80.00
AKG Motor And Transmission Mounts, Poly 75D $180.00
Syncro Custom differential 4 ramp 3.91 gear ratio $3,400.00
Differential Cooler $659.00
NB Shifter $399.00
AKG Selector Road $150.00
JB Flywheel and Clutch Combo $899.99
Stoptech slotted Rotors $300.00
Hawk Pads $600.00
Brake vents and backing plates $350.00
APEX 17x9.5 forged wheels $1,550.00
Toyo RR for track $1,100.00
M front bumper with VRS and APR splitter $1,500.00
APR 250 GT 61" rear wing $1,600.00
Activewekrs Headers $600.00
Super Spring Race Pipe & Exhaust cans $899.00
OMP Halo Seat $980.00
6 point harness $450.00
OMP seat mount $150.00
Bimmerworld floor mounts $150.00
OMP 330 steering wheel $299.00
OMP hub and quick release $550.00
Harness Thinning & Rainlights $1,250.00
Full Cage $3,680.00
Fire System $468.00
Driver Saftey Nets $350.00
Tune Epic Tune $998.00
Electronics Brallie Battery $345.00
AIM XL $2,100.00
Totals $42,231.96
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