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S65 4.0L Racing Engine Rebuild Kit with Stock Rods

$4,999.00$7,999.00

The CARBAHN Autoworks S65 4.0L racing engine rebuild kit with stock rods includes CARBAHN Autoworks valve springs, centered pin low friction forged pistons.

Optionally, you may choose to further enhance performance with our very high lift and duration camshaft kit, specifically designed in accordance with SCCA GT2 and Trans TA3 rules. This camshaft kit also includes a conversion to solid lifters and high performance valve springs with titanium retainers.

 

 

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Description

Steve Dinan has been building high performance and racing engines for BMW’s 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 Autoworks S65 4.0L racing engine rebuild kit with stock rods includes CARBAHN Autoworks valve springs, centered pin low friction forged pistons. This engine is excellent for BMW, SCCA or NASA club racing.

 

Refer to the graph below for the power results of the wet sump 4.0L Racing S65 with stock cams, without catalytic converters, on 100 octane race gas, using SAE J607 (the typical aftermarket correction).

S65 4.0L Wet Sump:

RPM TRQ HP
3500 313.7 209.1
4000 330.3 251.6
4500 331.6 284.1
5000 323.2 307.7
5500 324.4 339.7
5800 324.1 357.9
6000 318.3 363.6
6500 315.8 390.8
7000 314.1 418.6
7500 301.9 431.1
8000 294.6 448.7

No cats, 100 octane unleaded, J607

 

 

 

 

Optionally, you may choose to further enhance performance with our very high lift and duration camshaft kit, specifically designed in accordance with SCCA GT2 and Trans TA3 rules. This camshaft kit also includes a conversion to solid lifters, high performance valve springs with titanium retainers, and racing valves.

Refer to the graph below for the power results of the wet sump 4.0L Racing S65 with racing camshafts, without catalytic converters, on 100 octane race gas, using SAE J607 (the typical aftermarket correction).

S65 4.0L Wet Sump with Race Cams:

RPM TRQ HP
3500 278.2 185.4
4000 289.4 220.4
4500 315.2 270.1
5000 318.8 303.5
5500 325.0 340.3
6000 316.7 361.8
6500 312.5 386.8
7000 323.9 431.7
7100 324.9 439.2
7500 315.7 450.8
8000 310.9 473.6
8200 307.9 480.7

No cats, 100 octane unleaded, J607

 

 

 

These engines can run with the stock oiling system and wet sump, but for even more power and increased reliability, Carbahn Autoworks 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.

Refer to the graphs below for the power results of the dry sump 4.0L Racing S65 with and without race cams, without catalytic converters, on 100 octane race gas, using SAE J607 (the typical aftermarket correction).

S65 4.0L Dry Sump:

RPM TRQ HP
3500 311.9 207.9
4000 323.3 246.2
4500 328.9 281.8
5000 328.8 313.0
5500 328.6 344.1
5800 330.7 365.2
6000 329.1 375.9
6500 325.7 403.1
7000 321.8 428.9
7500 312.9 446.8
8000 306.6 467.0
8200 301.6 471.0

No cats, 100 octane unleaded, J607

 

 

 

S65 4.0L Dry Sump with Race Cams:

RPM TRQ HP
3500 276.0 183.9
4000 286.2 217.9
4500 312.5 267.7
5000 324.4 308.8
5500 329.2 344.7
6000 327.5 374.1
6500 322.4 399.0
7000 331.6 441.9
7100 332.6 441.9
7500 326.7 466.5
8000 322.9 491.8
8200 320.4 500.2

No cats, 100 octane unleaded, J607

 

 

Additional information

Engine Options

Pistons, Rods, Head Gasket, Add Racing Cams + Followers + Valve Springs [+$3000)

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Steve Dinan - Engine Sales     (669) 223-0563

Stephen Freeth - Racing Services Specialist     (408) 622-1529 Contact Stephen

David Kim - High Performance Specialist     (650) 495-0421 Contact David Kim