we saw the guy with the BRG exige and broken AC after a spin off at the wclm trackday, at the dealership today, another reason not to have it!
Broken rear toe link! Happened during the first track sesion! :wallbang: Made for a dramatic spin coming out of the Bus Stop section of the track, but luckily no real damage to speak of. Forklifted to Sevens Only (careful on lift points) to avoid possible CV joint damage rolling or driving car.TimMullen said:Okay, what's the story about the fork lift?
Pics of the toe link failure, please....or post elsewhere? Thanks. Many seem to be driver's side, inner.marcw said:Broken rear toe link! Happened during the first track sesion! :wallbang: Made for a dramatic spin coming out of the Bus Stop section of the track, but luckily no real damage to speak of. Forklifted to Sevens Only (careful on lift points) to avoid possible CV joint damage rolling or driving car. Stay tuned for a new, re-engineered sub $1,000 fix for this problem.
Well most US tracks tend to be CW, hence the higher loads on the driver's side in those instances. For CCW, the loads would tend to be greater on the passenger side. Some estimate that around 1/3 of the steady state cornering loads pass through the toe link.marcw said:Here is the WCLM trackday failure. It was the passenger's side inner. Sheared right off at the base. Track configuration was CCW. FWIW, the inner link is attached with a 10mm diameter thread, and the outer with a 12mm thread, so the inboard side is definately the weakest part of the system.
The early failure could also have been related to too low of a tightening torque at that bolt at the a-arm end. That's not a face burr is it on the flange, need closer up pictures?marcw said:Hansen: Yeah...this was a bummer! Double bummer because it happened in the first morning run session!!! The rear of the car totally came around on me quite violenly exiting a corner! Youch!
I have heard stories of guys smacking the wall when this toe link breaks at speed. Luckily, no other cars or immovable objects were around at the time.
We tried to get a solution figured out trackside at the shop, but did not have the right combo of metric ball joints / bolts / rods to whip something up.
At the risk of moving this thread further OT, This toe link issue is a real problem as proven today. As I PM'ed to Stan a little while ago, this car has only 2 track days with zero offs, zero acidents, and nothing unusual in its history other than just full-bore track driving. It did not have the brace when this happened. The brace simply provides a second "shear point" meaning essentially that the inboard mounting bolt is secured not only in the front where it attaches to the chassis, but also in the rear, where it attaches to the brace. Going to a double-shear design is nice, but I feel the real issue is the size (and possibly grade) of the inboard mounting bolt itself.
What's happening is that all of this tremendous cornering load is being concentrated on a very small 10mm bolt. The metal fatigue is simply too much and the little guy just snaps without warning, and the results can be catastrophic. I think this is a potentially very dangerous situation that needs to be addressed by anyone who seriosuly tracks their Elise at speed. Im only running DOT tires and im not out there banging into the FIA curbing and it happened to me, so this is a very real issue that potentially affects a wide swath of our club membership. I think if you track your Elise and this has not happened to you yet, either you aren't going fast enough, or your time has not yet come! -poke-
rear chassis brace,Hmm - is there any preventative fix for this?
Seems pretty on topic to me considering the first post shows a photo of the car being forklifted. You can't come by, drop a bomb like that, and not expect people to ask about it.khamai said:Can we get back on topic?
That's what I think, too; otherwise, we should have seen more failures already. Then again, it's better be safe than sorry.eliseowner2b said:Since this happened to a relatively new car could it have been defective from the start? Sure, the parts are the same but the piece could have been weak or installed improperly from the beginning?
What was the date of this track event?
Marc,marcw said:I think if you track your Elise and this has not happened to you yet, either you aren't going fast enough, or your time has not yet come! -poke-