S65 4.6L Stroked and Bored Engine BMW M3

S65 Engine - | E90, E92, E93 | M3

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

No cats, 100 octane unleaded, J607

S65 4.6L Wet sump with race cams:

No cats, 100 octane unleaded, J607

This engine can run with the stock oiling system and wet sump, but for even more power and increased reliability, CarBahn recommends the use of our dry sump kit. This kit includes a Dailey Engineering billet oil pan and oil pump, plus additional pulleys and a drive belt.

S65 4.6L Dry Sump:

No cats, 100 octane unleaded, J607

S65 4.6L Dry Sump with Race Cams:

No cats, 100 octane unleaded, J607

Engine core acceptance parameters

Must be complete core (factory engine, from oil pan to valve cover)

• Block must have no:
  • Holes or cracks in casting
  • Holes or crack in covers
  • Bore damage that cannot be honed out
  • Thrust surface damage
  • Journal surfaces damage
  • Bolt hole damage that can’t be repaired
• Heads must have no:
  • Holes or cracks in casting
  • Holes or crack in covers
  • Thrust surface damage
  • Journal surfaces damage
  • Bolt hole damage that can’t be repaired
• Additional repair charges could apply for damaged items that are not normally changed during an overhaul and cannot be repaired or serviced
  • Valves
  • Crankshafts
  • Camshafts
  • Guides
  • ValveTronic mechanism
  • Vanos mechanism

https://www.youtube.com/watch?v=WSHusoVQm8o

• Warranty & Additional Information
  Our engines are very strong and can often be very reliable even at power levels above what is recommended. The durability usually depends on the quality and the reliability of the tune and other aftermarket components added to the engine management system.

  • Engines with CarBahn Software Tunes
    All engines listed with a stage number are designed to be road car engines and are covered for 2 years, 24,000 miles providing they have a CarBahn tune and there are no other parts on the car that have caused a premature failure.
  • Engines with Another Company's Tune
    

    All engines listed with a stage number are designed to be road car engines and are covered are covered for 2 year, 24,000 miles providing they you stay under our recommended torque limits. Torque limits are indicated on our web site. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. If Torque limit is exceeded the warranty is for materials and workmanship only.

  • Racing Engines
    Racing engines are designed to be raced and are covered for materials and workmanship only. Racing engines should be rebuilt periodically based on run time or mileage. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. 

Designed to be both stronger and more cost-effective than the BMW OEM factory engine, the CarBahn S65 Engine benefits from Steve Dinan's 46 years of race engine-building expertise. His engines have powered multiple championship-winning cars, including three prototype racing titles and two overall victories at the 24 Hours of Daytona (2011-2013).

Choose CarBahn for superior S65 engine tuning.