01-04-2024, 05:47 PM | #1 |
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Kies Executive Strut Brace
I apologize, as I know this has probably been hashed and rehashed on this forum, but I'm looking to replace the OEM strut brace on my G82 M4.
I like this one, and it's great for the price. Anyone have experience with this brand/particular part and have any feedback on their impressions? Is the Turner better? Is there another brand I haven't heard of yet that's better? TIA! |
01-04-2024, 06:27 PM | #2 | |
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01-08-2024, 09:28 AM | #3 |
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A strut tower brace is used to limit the lateral out-if-plane movement of one strut tower relative to the other. A design that uses monoballs at each mounting location will still limit the relative lateral motion of a strut tower just as effectively as a design that uses fixed interface mounting points at each mounting location - think of it as the one highly loaded strut towers is pulling inward on the other lightly laterally loaded tower. Primarily, it’s tension-compression loading between the towers. Most people think its job is to increase torsional stiffness but that’s incorrect.
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01-08-2024, 01:42 PM | #4 | |
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Fixed strut bar is preferable. It's the route the BMW engineers went.
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01-08-2024, 01:52 PM | #5 | |
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01-10-2024, 04:29 PM | #7 | |
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01-10-2024, 04:33 PM | #8 |
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Someone posted a pic of CSL-style brace made of carbon. I recall someone saying it’s a prototype and not in production yet.
I think that would be a great OEM+ option, assuming it doesn’t cost your left testicle. |
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01-10-2024, 08:01 PM | #9 |
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DOF = degree of freedom.
Three orthogonal forces/displacements acting along the x, y and z axes, and three orthogonal moments/rotations acting about the x, y and z axes. Practically, it is difficult to provide supporting structure that is stiff enough in rotational DOF to support moment continuity. So even though a design may appear to be supporting structure in all six DOF, there isn’t sufficient local stiffness to support some or all of the local rotations and, therefore, what appears to be a six DOF, “clamped” design, actually only supports three translational DOF, “pinned” design. In reality, the actual design is between a “clamped” and “pinned” design, usually closer to a “pinned” design. Last edited by M3SQRD; 01-10-2024 at 08:13 PM.. |
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01-10-2024, 09:09 PM | #10 | |
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01-10-2024, 09:14 PM | #11 |
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01-10-2024, 11:34 PM | #12 | |
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01-10-2024, 11:40 PM | #13 | |
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01-11-2024, 07:10 AM | #14 | |
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01-14-2024, 05:09 AM | #15 | |
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01-14-2024, 06:06 AM | #16 | |
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Edit: how many different companies make strut tower braces for the G8x?!?! Turner Motorsports also offers a CF strut tower. Any other strut towers out there? It would be great if these companies would provide measurements of main cross sections and CF wall thickness (and CF material used which will never happen) so quantitative assessments of the performance of each design can be assessed. However, most people are adding them based on looks rather than actual function/performancd - just look at the people drooling over the Dinan design. Order based on stiffness: Karbonius OEM CSL Turner/Kies Dinan Aesthetics: Karbonius Dinan OEM CSL Kies Turner Last edited by M3SQRD; 01-14-2024 at 02:07 PM.. |
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