S65 4.6L Stroked and Bored Engine | BMW M3
Vehicle Fitment & Product Details
- Type Engine
- Make BMW
- Model(s) M3
- Vehicle Year(s) 2008, 2009, 2010, 2011, 2012, and 2013
- Chassis E90, E92, and E93
- Body Style(s) Coupe, Convertible, and Sedan
- Part Number CB665-6001
- Fits Engines S65
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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 | 404.6 | 431.4 |
| 6000 | 401.5 | 458.7 |
| 6500 | 402.3 | 497.9 |
| 7000 | 383.2 | 510.7 |
| 7500 | 367.5 | 524.8 |
| 8000 | 356.3 | 542.7 |
| 8200 | 348.8 | 544.6 |
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:
| RPM | TRQ | HP |
| 3500 | 371.3 | 247.4 |
| 4000 | 382.1 | 291.0 |
| 4500 | 390.5 | 334.6 |
| 5000 | 398.3 | 379.1 |
| 5500 | 403.2 | 422.3 |
| 5600 | 403.6 | 430.3 |
| 6000 | 402.8 | 460.1 |
| 6500 | 395.6 | 489.6 |
| 7000 | 385.8 | 514.2 |
| 7500 | 373.3 | 533.1 |
| 8000 | 353.4 | 538.3 |
No cats, 100 octane unleaded, J607
S65 4.6L Dry Sump with Race Cams:
| RPM | TRQ | HP |
| 3500 | 334.2 | 222.7 |
| 4000 | 343.9 | 261.9 |
| 4500 | 371.0 | 317.9 |
| 5000 | 400.3 | 381.1 |
| 5500 | 405.6 | 424.8 |
| 5600 | 405.8 | 432.7 |
| 6000 | 404.3 | 461.9 |
| 6500 | 399.8 | 494.8 |
| 7000 | 397.6 | 529.9 |
| 7500 | 398.4 | 568.9 |
| 8000 | 373.8 | 569.4 |
| 8200 | 366.0 | 571.4 |
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