Trailing Arm/Drop Links - 986 Forum - The Community for Porsche Boxster & Cayman Owners

JimmyBad · 10-21-2019, 11:23 AM

Quote:

Originally Posted by Quadcammer

pretty serious safety issue if they break. You sound kind of blaise about a broken arm, but if that occurs at highway speeds, you could be in real trouble.

The arm does not bend or is not under tension at ride height. In fact they were replaced while the wheels were under load like I stated. If they were to break it would be at a fairly low speed over deep pot holes. The other guy that broke the arm in rennlist was pulling up to his home when his broke (maybe pot holes in his area?). If you disagree with my idea let me know.

rfuerst911sc · 10-21-2019, 11:50 AM

I am not familiar with the Rennlist description of a failure/s . Does anyone know how many documented failures are out there ? Just curious how many failures vs. number sold . Is it 1 out of 100 ? 5 out of 1000 ? 98 out of 100 ? I bought a rear set of EPS a few years ago and haven't gotten around to installing them yet . Every component on a vehicle fails at some point that's why we replace parts . But a catastrophic failure is a different issue . Any feedback on actual numbers ?

JimmyBad · 10-21-2019, 11:59 AM

Quote:

Originally Posted by rfuerst911sc

I am not familiar with the Rennlist description of a failure/s . Does anyone know how many documented failures are out there ? Just curious how many failures vs. number sold . Is it 1 out of 100 ? 5 out of 1000 ? 98 out of 100 ? I bought a rear set of EPS a few years ago and haven't gotten around to installing them yet . Every component on a vehicle fails at some point that's why we replace parts . But a catastrophic failure is a different issue . Any feedback on actual numbers ?

I didn’t do a deep search but the amazon review and the rennlist post I saw were the same guy that bought the EPS front arms. Didn’t see any other person having the same issue with either arms.

rfuerst911sc · 10-21-2019, 02:29 PM

Quote:

Originally Posted by JimmyBad

I didn’t do a deep search but the amazon review and the rennlist post I saw were the same guy that bought the EPS front arms. Didn’t see any other person having the same issue with either arms.

I wouldn't expect anyone to do a deep dive I was just curious about a " rough " number . If we assume it is one it is possible that one could have been a defective casting . Or it could have been because it was an EPS bushing . Or maybe it was damaged along the way . Too many variables and not a large enough sample size to be conclusive .

Silber · 10-22-2019, 01:41 PM

Quote:

Originally Posted by JimmyBad

The arm does not bend or is not under tension at ride height. In fact they were replaced while the wheels were under load like I stated. If they were to break it would be at a fairly low speed over deep pot holes. The other guy that broke the arm in rennlist was pulling up to his home when his broke (maybe pot holes in his area?). If you disagree with my idea let me know.

If you are driving at high speed and hit a pot hole, curb or other obstruction in the road, it could easily snap at speed. If you engage in spirited driving the car does not stay perfectly level, this swaying of the body and consequent uneven loading of the suspension left to right could also snap such a design.

I wouldn't put one on my car, FWIW.

Steve

JimmyBad · 10-22-2019, 02:10 PM

Quote:

Originally Posted by Silber

If you are driving at high speed and hit a pot hole, curb or other obstruction in the road, it could easily snap at speed. If you engage in spirited driving the car does not stay perfectly level, this swaying of the body and consequent uneven loading of the suspension left to right could also snap such a design.

I wouldn't put one on my car, FWIW.

Steve

I agree with your point. However, given my age and driving ability, while engaging in such spirited driving, the chances of me getting associated with a car accident is greater that the arm breaking.

Edit: I’m not trying to say that the arms will not break. But, I’m more than willing to “field test” them and provide a feedback if they break.

piper6909 · 10-22-2019, 03:12 PM

Quote:

Originally Posted by JimmyBad

I agree with your point. However, given my age and driving ability, while engaging in such spirited driving, the chances of me getting associated with a car accident is greater that the arm breaking.

Edit: I’m not trying to say that the arms will not break. But, I’m more than willing to “field test” them and provide a feedback if they break.

Odds are that they won't break and I, for one, and I'm sure everyone here certainly hopes they won't. I just don't think the EPS bushing is a good design. I'd stick with ones that keep the original ball bushing design.

rfuerst911sc · 10-23-2019, 03:05 AM

If the EPS is ruled out as an option and folks don't like the standard OEM is there a " better than OEM " part available ? Same ball design but heavier duty/longer lasting ?