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The E30 S50 swap is a popular modification among car enthusiasts, particularly those looking to enhance the performance of their BMW E30. One of the critical components of this swap is selecting the right transmission to ensure optimal performance and compatibility. In this article, we will explore the best transmission options for the E30 S50 swap, focusing on M3 gearbox compatibility.
Understanding the E30 S50 Swap
The E30 chassis, produced by BMW from 1982 to 1994, is beloved for its lightweight design and excellent handling. The S50 engine, derived from the E30 M3, offers significant power and torque improvements over the stock engines found in E30 models. However, swapping an S50 into an E30 requires careful consideration of transmission options to maximize performance and reliability.
Transmission Options Overview
When considering transmission options for the E30 S50 swap, there are several factors to take into account:
- Compatibility with the S50 engine
- Gear ratios for optimal performance
- Availability of parts and support
- Cost and budget considerations
Best Transmission Options
ZF 5-Speed Transmission
The ZF 5-speed transmission is one of the most popular choices for the E30 S50 swap. It was originally used in the E30 M3 and offers excellent durability and performance. Here are some key features:
- Gear Ratios: The ZF 5-speed features well-spaced gear ratios that enhance acceleration and top speed.
- Strength: This transmission is known for its robustness, making it suitable for high-performance applications.
- Compatibility: Directly compatible with the S50 engine, requiring minimal modifications.
Getrag 260 Transmission
The Getrag 260 is another viable option for the E30 S50 swap. While it may not be as popular as the ZF, it offers a different set of advantages:
- Weight: The Getrag 260 is lighter than the ZF, which can improve handling and performance.
- Affordability: Generally more affordable than the ZF 5-speed, making it a budget-friendly option.
- Availability: Commonly found in various E30 models, making parts easier to source.
Getrag 318i Transmission
The Getrag 318i transmission is often overlooked but can be a suitable option for the E30 S50 swap, particularly for those looking for a unique setup:
- Compact Design: Its smaller size can help with fitment in tighter engine bays.
- Decent Gear Ratios: While not as optimized as the ZF, it still provides reasonable performance.
- Cost-Effective: Typically available at a lower price point, making it accessible for budget builds.
M3 Gearbox Compatibility
When discussing transmission options for the E30 S50 swap, it’s essential to address M3 gearbox compatibility. The E30 M3’s gearbox was designed to handle the power output of the S50 engine, making it a natural choice for this swap. Here’s what you need to know:
- Direct Fit: The M3 gearbox is a direct fit for the S50 engine, simplifying the installation process.
- Performance: Offers excellent performance characteristics, enhancing the overall driving experience.
- Parts Availability: While M3 parts can be more expensive, they are generally available through various suppliers.
Conclusion
Choosing the right transmission for your E30 S50 swap is crucial for achieving the desired performance and reliability. The ZF 5-speed transmission is the most popular choice due to its strength and compatibility, while the Getrag 260 and 318i transmissions offer viable alternatives for those on a budget or looking for different characteristics. Ultimately, the M3 gearbox remains the ideal option for those seeking the best compatibility and performance from their S50 swap.