On the second pass, the overboost protection feature kicked in at 19 psi, which it hit by second gear and killed the power. he didn't get a chance to fix it there, but Kakaletris plans to return in hopes of some mid-10-second runs. A month on and the M Coupe's 3.23 rear end was swapped for a taller 2.93 final drive with more lock-up, putting more power to the ground and loading the turbos harder in each gear. A Getrag six-speed tranny also found its way in. the next LP640 owner will be flabbergasted when this little coupe rockets ahead at over 210 mph.
ICS BMW Z3 M Coupe Twin Turbo
*Layout
Longitudinal front engine, rear-wheel drive
*Engine
3.2-liter inline six, 0.14-inch Cometic low-compression head gasket, twin Gt28RS turbos with internal wastegates, iCS custom manifolds with t25 flanges and 3.5-in turboback exhaust, Clutchmasters FX700 clutch, Walbro fuel pump, Aquamist hFS-5 methanol injection, technique tuning/iCS software package, stock OBD-ii computer
*Transmission
Euro-spec six-speed manual, 2.93 limited-slip differential
*Suspension
H&R coilover kit, Dinan strut and anti-roll bars
*Brakes
F: Stoptech 14-inch big brake kit
R: Stoptech slotted rotors
*Wheels And Tires
TRMotorsport Mt1 8.5x18 (f), 10x18 (r)
Kumho Escta 225/40 (f), 295/30-18 (r)
*Interior
Eboost2 electronic boost controller,AEM air/fuel gauge
*Performance (measured at the wheels)
Power: 604 hp @ 6400 rpm
Torque: 607 lb-ft @ 4850 rpm
Quarter-mile: 11 seconds at 133.7 mph