The BMW E30 and E36 chassis, while both iconic in their own right, present distinct differences in their rear suspension designs. Swapping components between the two generations, particularly the rear trailing arms, requires careful consideration and modification. This guide delves into the complexities of fitting E30 compact trailing arms onto an E36 chassis, addressing common questions and potential challenges.
Why Swap E30 Compact Trailing Arms onto an E36?
This modification isn't a straightforward bolt-on affair; it's often undertaken for specific performance goals. The E30 compact trailing arms, typically found on the 318ti and other compact models, offer certain characteristics that some E36 enthusiasts find desirable. These might include a slightly different geometry that enhances handling characteristics, or potentially a weight savings compared to the stock E36 components. However, it's crucial to understand that the benefits are often subtle and depend significantly on the rest of the suspension setup.
What Modifications Are Needed?
This is not a simple swap. Significant fabrication and modification are necessary. The E30 and E36 subframes and mounting points are different, requiring custom fabrication of brackets and potentially even modification to the chassis itself. You'll need strong welding skills and a good understanding of chassis dynamics to undertake this project successfully.
H2: Are E30 Trailing Arms Stronger Than E36 Trailing Arms?
While the E30 and E36 trailing arms are designed for different applications and have slightly different construction, there's no definitive answer to which is "stronger." Both are robust enough for their intended purpose. The perceived strength difference is often related to individual experiences and the specific driving style and conditions.
H2: What are the Handling Differences with E30 Compact Trailing Arms on an E36?
The handling changes are subtle and depend heavily on the overall suspension setup. Some report a slightly more responsive feel, potentially due to altered geometry, while others experience no significant differences. It's crucial to remember that this modification introduces variables that can affect the car's handling characteristics unpredictably. Professional alignment is essential after the installation.
H2: Will E30 Compact Trailing Arms Fit an E36 Without Modification?
No. The E30 compact trailing arms will absolutely not fit an E36 without significant modifications. The mounting points, subframe design, and overall geometry are fundamentally different.
H2: What are the potential drawbacks of this swap?
There are several potential drawbacks to consider:
- Increased Complexity: This modification is significantly more involved than a simple suspension swap. It requires advanced fabrication skills and a detailed understanding of automotive mechanics.
- Potential Handling Issues: Incorrect installation or unforeseen interactions with other suspension components can lead to unpredictable handling characteristics, potentially compromising safety.
- Reduced Reliability: Improper welding or fabrication can lead to failure of the modified components.
- Cost: The cost of materials, tools, and labor can be substantial.
Conclusion:
Swapping E30 compact trailing arms onto an E36 is a significant undertaking, requiring considerable fabrication skills and expertise. While some enthusiasts pursue this modification for potential performance gains, it's crucial to carefully weigh the potential benefits against the significant challenges and potential drawbacks. This is not a project for novice mechanics and should only be attempted by experienced individuals with the necessary tools and expertise. Always prioritize safety and professional alignment after any suspension modification.
