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The BMW E30, a beloved classic among car enthusiasts, has been the subject of numerous modifications and performance upgrades over the years. One of the most popular engine swaps for the E30 is the S50 variant, which comes from the E36 M3. This article explores the dyno results of various S50 variants installed in the E30 chassis, showcasing the power gains achieved through these modifications.
Understanding the S50 Engine Variants
The S50 engine family includes several variants that differ in specifications and performance characteristics. Here are the primary S50 variants:
- S50B30: 3.0L inline-six engine from the E30 M3 (Europe)
- S50B32: 3.2L inline-six engine from the E36 M3 (Europe)
- S50B30US: 3.0L inline-six engine from the E36 M3 (USA)
Dyno Testing Methodology
To accurately assess the power gains from each S50 variant, a series of dyno tests were conducted. The following methodology was used:
- Baseline testing was performed on a stock E30 to establish initial power figures.
- Each S50 variant was installed in the E30 and tuned for optimal performance.
- Dyno runs were conducted to measure horsepower and torque at the wheels.
- Multiple runs were completed to ensure consistency and accuracy of results.
Dyno Results Overview
The following section presents the dyno results for each S50 variant tested in the E30. Power figures are measured at the wheels and reflect the performance gains achieved through each engine swap.
S50B30 Dyno Results
The S50B30 variant, known for its high-revving nature, produced impressive results. The dyno figures were as follows:
- Peak Horsepower: 220 hp
- Peak Torque: 200 lb-ft
These figures represent a significant increase over the stock E30, which typically produces around 130 hp.
S50B32 Dyno Results
The S50B32 variant, with its larger displacement, showcased even greater power gains. The dyno results indicated:
- Peak Horsepower: 240 hp
- Peak Torque: 225 lb-ft
This variant not only provided more horsepower but also improved torque delivery, enhancing the overall driving experience.
S50B30US Dyno Results
The S50B30US variant, designed for the American market, delivered respectable performance figures:
- Peak Horsepower: 240 hp
- Peak Torque: 225 lb-ft
While similar in power to the S50B32, the tuning and characteristics differ slightly due to emissions regulations and engine management systems.
Comparative Analysis of Power Gains
When analyzing the dyno results, it’s evident that each S50 variant offers unique advantages. Here’s a summary of the power gains:
- S50B30: +90 hp and +70 lb-ft over stock
- S50B32: +110 hp and +95 lb-ft over stock
- S50B30US: +110 hp and +95 lb-ft over stock
These figures demonstrate the significant performance enhancements achievable through the S50 engine swap, making it a popular choice among E30 enthusiasts.
Conclusion
The dyno results clearly indicate that swapping an S50 variant into an E30 can yield impressive power gains. Whether opting for the S50B30, S50B32, or S50B30US, enthusiasts can expect substantial improvements in both horsepower and torque. This makes the E30 not only a classic but also a formidable performer on the road or track.
As the E30 continues to gain popularity in the automotive community, the S50 engine swap remains a top choice for those looking to enhance their vehicle’s performance while enjoying the classic BMW driving experience.