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The BMW E30 is a beloved platform for enthusiasts looking to enhance performance and experience the thrill of driving. One of the most popular modifications is the S50 engine swap, which can yield over 300 horsepower. However, to fully utilize this power, choosing the right transmission is crucial. In this article, we will explore the best transmission pairings for your E30 S50 swap to ensure you get the most out of your setup.
Understanding the S50 Engine
The S50 engine, a part of BMW’s M series, is known for its high-revving nature and impressive power output. It is a 2.5L inline-six engine that was used in the E30 M3 and other models. When swapping this engine into an E30, it’s essential to consider how the transmission will affect performance, drivability, and overall enjoyment.
Key Factors in Transmission Selection
- Power Handling: The transmission must be able to handle the increased power from the S50 engine.
- Gear Ratios: Optimal gear ratios can enhance acceleration and top speed.
- Weight: A lighter transmission can improve handling and performance.
- Drivability: Consider how the transmission affects daily driving and overall comfort.
Top Transmission Options for E30 S50 Swaps
1. Getrag 260
The Getrag 260 is a popular choice for E30 enthusiasts. Known for its durability and smooth shifting, this transmission can handle the power of the S50 engine effectively. With a close ratio, it provides an engaging driving experience, making it ideal for both street and track use.
2. Getrag 240
The Getrag 240 is another viable option, particularly for those looking for a lightweight transmission. While it may not handle as much power as the Getrag 260, it offers a great balance of performance and drivability. Its shorter gear ratios can enhance acceleration, making it a fun choice for spirited driving.
3. ZF 5-Speed
The ZF 5-speed transmission is known for its robust construction and ability to handle high power levels. This transmission is often found in higher performance BMW models and can be a great pairing with the S50. Its gear ratios are well-suited for both street and track applications, providing a good blend of performance and comfort.
4. Tremec T5
The Tremec T5 is a popular choice among enthusiasts looking for a modern transmission option. Known for its strength and versatility, the T5 can handle significant power levels and offers a variety of gear ratios. This transmission can be adapted to fit the E30 with the right mounting kit, making it a great choice for those seeking a custom setup.
5. BMW 6-Speed (Getrag 420G)
For those looking for the ultimate performance, the BMW 6-speed Getrag 420G transmission is an excellent option. This transmission allows for higher top speeds and better fuel efficiency at cruising speeds. While it requires more work to install, the benefits it provides in terms of performance and drivability are well worth the effort.
Conclusion
Choosing the right transmission for your E30 S50 swap is crucial to maximizing performance and enjoyment. Each of the options discussed has its own strengths and weaknesses, so consider your driving style and preferences when making a decision. With the right transmission, you can fully unlock the potential of your S50 engine and enjoy an exhilarating driving experience.