The BMW S65 V8 is one of the most respected naturally aspirated engines ever produced. Designed by BMW M engineers for high-revving performance, it has proven itself across both street and motorsport applications.

This build takes that platform significantly further.

This is a 750-horsepower supercharged S65 stroker engine, engineered from the ground up to handle increased cylinder pressure, higher RPM, and sustained real-world use. Every component in this build is selected to work together as a complete system—focused on strength, airflow, and durability.

This is not a bolt-on combination.
This is a fully developed engine package.

Base Platform

• Engine: BMW S65 V8
• Chassis: BMW E90 / E92 / E93 M3
• Configuration: Sleeved, Stroker, Supercharged
• Output: Approximately 750 HP

Bottom End & Block Reinforcement

The foundation of this build begins with reinforcing the S65 block to support increased power levels and long-term reliability.

VAC High Performance Main Bearing Set (VAC-HPMBS-S65)
VAC Stroker Crankshaft – 84mm Stroke (VAC-SC-S65-ST2)
VAC Flanged Cylinder Sleeve Set – 92–94mm Bore (VAC-FCS-S65-G2)
VAC Motorsports Sleeving Service (LAB-11-SB-S65)

This combination increases displacement, strengthens the cylinder walls, and ensures the block can withstand boost without compromising durability.

Cylinder Head Development & Valvetrain

Airflow is a critical component of power production. This build utilizes fully developed cylinder heads and camshaft profiles designed to maintain performance at high RPM.

VAC Stage 3 Performance Cylinder Heads (VAC-S3PCH-S65)

Stage 3 includes:

• CNC 5-axis porting
• Performance valves
• Performance valve springs and retainers
• Valve guides and seals
• Multi-angle valve job
• Resurfaced mating surface
• Complete assembly

Schrick Camshaft Set – 284° / 292° (SCH-CSS-S65-SC) — *Pricing depending on Tarriff Fee

This combination ensures the engine continues to produce power efficiently throughout the rev range.

Induction, Airflow & Exhaust System

To reach the targeted power output, this build incorporates a complete forced-induction system, supported by optimized intake and exhaust components.

VF Engineering Supercharger System (VFE-SCK-E9XM3-650-DCT) — $9,995.95
VAC Ported Throttle Bodies (VAC-TB-S65)
American Racing Headers – BMW E9X M3 (ARH-E92M3)

This system allows the engine to breathe efficiently under boost, improving both horsepower and throttle response.

Fasteners & Engine Integrity

At this level of performance, proper clamping force and structural stability are critical.

ARP Head Stud Kit (ARP-HSK-S65)
Raceware Main Stud Kit (RWE-MSK-S65)

These components ensure consistent sealing and reliability under high load conditions.

Supporting Components & Internal Hardware

Additional components used throughout the build include:

CP Forged Pistons – 92.5mm, 12:1 Compression (CP-FPS-S65-92.5-12) — $1,799.95
CP Teflon Skirt Coating (CP-U-Coat-Skirt) — $320.00
SP Connecting Rod Set – S65 (SP-CRS-S65) — $1,599.95
VAC High Performance Rod Bearing Set – Extra Clearance (VAC-HPRBS-S65-X) — $559.95
VAC MLS Head Gasket – 93mm x .030 (VAC-HG-S65-93030) — $379.90
BMW Head Gasket Set (BMW-HGS-S65) — $684.95
BMW Crankcase Gasket Set (BMW-CGS-S65-OE) — $331.95
BMW Timing Chain Tensioners (BMW-11-31-7-839-053) — $269.90
BMW Timing Chain Rails (BMW-11-31-7-838-869) — $103.90
Supertech High Performance Valve Kit, S65

Labor & Machining Services

BMW All-Aluminum V8 Engine Rebuild Labor (LAB-11-CER-8-4V) — $8,995.00
Crankshaft Balancing – V8 (LAB-11-BC-V-8) — $499.95

Total Build Investment

$37,709.60

This reflects the full component and service breakdown required to build a properly engineered, high-horsepower S65.

Engineering Approach

There are two ways to approach an S65 build:

• Add power and rely on factory limitations
• Engineer the engine to support the intended power level

This build follows a complete engineering approach:

• Reinforced block with flanged cylinder sleeves
• Increased displacement through a stroker crankshaft
• Optimized airflow through cylinder head development
• Camshaft selection for high RPM performance
• A supercharger system matched to the engine’s capabilities

Every component is selected to work as part of a complete system.

Proven Performance

BMW engineered the S65 for performance. The difference at this level is execution.

VAC-built engines are used in:

• SCCA
• NASA
• BMW CCA Club Racing
• Rally and hill climb events
• Vintage racing

These engines are built to perform under sustained load—not just produce peak numbers.

Conclusion

This 750HP supercharged S65 stroker build represents a complete, engineered solution for the BMW E9X M3 platform.

It is designed for those who require more than peak performance—those who demand reliability, consistency, and long-term durability.

Any questions? Please call or Email: sales@vacmotorsports.com