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S65 4.6L Racing Stroker Engine

$24,499.00$27,499.00

The CARBAHN Autoworks 4.6L racing stroker S65 engine includes a billet crankshaft with an 83mm stroke that utilizes racing rod bearings. Over-sized forged pistons with a 94mm bore are used with forged Carrillo racing rods with CARR bolts.

We perform a valve job with new cam followers, timing chains, timing chain guides, timing chain tensioners and all associated seals and gaskets.

You may use the stock camshafts, or optionally choose our special, very high lift racing camshaft kit which also includes a conversion to solid lifters and high performance valve springs with titanium retainers.

This engine is excellent for BMW CCA, SCCA or NASA club racing.

 

 

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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 4.6L racing stroker S65 engine includes a billet crankshaft with an 83mm stroke that utilizes racing rod bearings. Over-sized forged pistons with a 94mm bore are used with forged Carrillo racing rods with CARR bolts. We perform a valve job with new cam followers, timing chains, timing chain guides, timing chain tensioners and all associated seals and gaskets.

You may use the stock camshafts, or optionally choose our special, very high lift racing camshaft kit which also includes a conversion to solid lifters and high performance valve springs with titanium retainers. This engine is excellent for BMW CCA, SCCA or NASA club racing.

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 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.

 

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

 

Additional information

cams or no

Re-use Stock Camshafts, Racing Camshaft Kit [+$3,000]

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Our team is always ready to help you in any way possible and we can connect you with the best products around. Call today and talk to one of our specialists about how we can upgrade and improve your BMW.


 

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