CarBahn S65 4.6L Stroked and Bored Engine BMW M3 2008 - 2013 E90, E92, E93

The CarBahn S65 4.6L stroked and bored engine kit includes over-sized forged pistons, a forged crankshaft with increased stroke, and high-strength forged Carrillo connecting rods. The bore is increased to 94mm and the stroke is increased to 83mm. In addition, common S65 failure points are addressed with Clevite-Dinan racing rod bearings and CarBahn valve springs. Steve Dinan has been building high performance and racing engines for BMW since 1977, winning 11 racing championships including 3 prototype championships and two 24 Hours of Daytona. The same engine shop that builds the racing engines also builds the street car engines; these talented engineers, machinists, and builders have built hundreds of engines from OEM street rebuilds to full-blown racing engines. The CarBahn S65 4.6L stroked and bored engine kit includes over-sized forged pistons, a forged crankshaft with increased stroke, and high-strength forged Carrillo connecting rods. The bore is increased to 94mm and the stroke is increased to 83mm. In addition, common S65 failure points are addressed with Clevite-Dinan racing rod bearings and CarBahn valve springs. Kit includes: Crankshaft, pistons (with rings, wrist pins, and circlips), connecting rods, rod bearings, valve springs, and MLS (multi-layer steel) head gasket. Refer to the graphs below for the power results without catalytic converters on 100 octane race gas and using J607 (the typical aftermarket correction). S65 4.6L Wet sump
RPM TRQ HP 3500 373.4 248.9 4000 392.2 298.7 4500 393.9 337.5 5000 390.8 372.1 5500 399.0 417.8 6000 388.4 443.8 6500 382.4 473.3 7000 371.5 495.1 7500 358.6 512.1 7700 352.3 516.5 8000 337.4 514.0 No cats, 100 octane unleaded, J607 S65 4.6L Wet sump with race cams:
RPM TRQ HP 3500 336.0 223.9 4000 353.0 268.9 4500 374.2 320.6 5000 392.8 374.00 5500 401.3 420.3 5600