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I got a track alignment done on my 951 today and ended up with toe out on the rear. Apparently the guys spent 7 hrs on the alignment and couldn't get any camber on the back without getting toe out.
So now I have ended up with 1.75 neg camber at the back and 1mm toe out per side.
Should I be worried about this? Is rear toe out as bad as people say? Ie. will it be very unstable on the track?
And what can be done about it? The mechanic said that he would need to enlarge the slots for the eccentric nuts to be able to adjust the toe any further...is this a common problem?
I am running 265 street semi slicks all round and have coilovers at the front and helper springs in the back.
Stock ride height? Usually setting the toe isn't a problem when the cars are lowered.
I wouldn't be too worried. It'll be a little twitchy under braking and will probably turn-in a little more rapidly than you expect. Should be totally safe... but it might not inspire the confidence you need to push harder.
The camber eccentric will hit your desired relationship in two places on its arc.
It is hard to type out a description but with the offset facing down, the camber increases.
So if the eccentric lobe is facing forward, your toe is limited. If the lobe is facing to the rear of the car, with the same angular relationship, your toe should be adjustable.
Might have to zero your toe then work both until you get your desired camber with the camber eccentric offset facing the rear of the car.
Van, it's lowered a little bit. The eccentric nut for ride adjustment is on it's lowest setting.
I guess for now I'll just see how she handles and deal with it. I'm not afraid of sliding about, but I don't want to be loosing too much corner speed because the back end might be breaking out sooner than normal?
Here's a pic from before the alignment so you can see the ride height.
Thanks Thomas, I'm gonna have a look under the car and see what they've done. Unfortunately though I don't have the tools or know-how to perform a good alignment myself, and I don't really want to fork out another small fortune for a different shop to have an attempt.
Your car looks awesome! However, unless you have crazy stiff springs on it, you're likely going to have some fender rubbing issues. I usually find that more distracting during a hard drive than a little bit of twitchy-rear feel. My car is 0 toe, borderline toe out, and it seems reasonably ok. Probably wouldnt have done than on purpose, but that's what I got.
I understand that! It is all intertwined back there) think of the cam lobe of the eccentric pushing down on the control arm to make it pivot at the toe hole. It is going to push down the same amount in two places.
I hope you understand my discription....i messed with mine so much to 'get it', that I need to replace the hardware.
Thanks Auto Werks, yep you are right, the tires were rubbing a lot. Much less with the camber now, and shouldn't rub at all once I get the guards rolled. Then I can finally put the new tires and alignment to the test. Have been avoiding hard cornering because it chews up the sidewalls.
Thanks Thomas, yeah I understand how it works, just wanted to double check in case the mechanic was telling me fibs, but I think I believe their story...just a shame I couldn't get the rear exactly how I wanted it.
Yeah, those are the wrong offset wheels... And you need to re-index the torsion bars to lower the ride height - especially if you've put helper springs on.
Yeah mate, I'm on the southside. We should meet up some time...I'm keen to get to know some 944 people around here :-) Do you go to QR sprints at all?
Also, for those following the thread I took the car to a different alignment shop and got them to check the specs with the laser machine. Turns out it was nothing like what the first shop said anyway. I ended up getting my money back though luckily. I'm going to get some camber tops for the front and then have the new alignment place do a proper alignment for me.
The rear camber adjustment is similar to setting the balance belt tension. If the balance eccentric is on the wrong side, the idler won't adjust to the proper clearance.
Thanks Thomas. I will inform myself some more so I know exactly how to do the alignment so that I can watch the new shop do it, and make sure they do a proper job.
When I had the alignment checked, it actually now has toe out on one side, and toe in on the other. So I guess the camber eccentric is facing the wrong way on the one side and that's why it has toe out there. Either way, if I have toe in on one side, then I'll definitely be able to get toe in on the other side, or at least 0 toe all round.
07-30-2015, 10:40 AM
Rear Toe Out
