The 1 Lap race is an 8-day race featuring cars where the main qualifying requirement is that they be street legal. Otherwise, it’s basically a run what you brung affair. But lest you think that a thousand-horsepower beast will do the trick, the mix of events (time trials, drag racing, autocrossing and skid pad challenges) ensure that the most well-rounded car wins. To this end, a lot of interpretations have been entered since the race’s inception and for this year, one of the entries is a Z3 M Coupe that the owner hopes will have what it takes to take top honors.
The body features a carbon fiber hood (55 lbs saving), roof (saving 40 lbs), front bumper cover with splitter and cooling ducts, Grand-Am spec CF rear wing and carbon fiber front and rear quarter panels. Underneath, CCW 18x9.5 and 18x 11 wheels, Michelin PS2 tires, Rotora 6 piston 355mm front and 4 piston 330mm rear brakes, TC Kline Double adjustable shocks and camber plates, H&R swaybars, Ireland Engineering subframe bushings and rear toe adjusters and RRT subframe reinforcements make up the upgraded components.
The engine is a Dinan-built race spec BMW S62 V8 with custom 3-ring composite Mahle pistons, race cams, billet steel crank, solid lifters, Carillo rods, valve springs and valve retainers. A dry sump system side mounted on the oil pan lubes the internal works and engine management and traction control are handled by a Pectel SQ6 ECU. Horsepower calculations put the engine’s output in the 600 hp range and an OS Giken clutch and LSD were installed to handle that power.
The one lap starts on April 30 and ends on May 7.
Engine startup video.
Revving the S62.
Source article is here.
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