Adjusting rear ride height (78 911-SC w/adjustable spring plates)

I have a 1978 SC (euro) with factory adjustable spring plates to set ride height. How do you use the two eccentric bolts to lower the rear of the car? My shop manual doesn't cover it. I put new Koni's in and as a result the car is sitting too high in the rear.

Thanks in advance

Anyone?

Leon, Warren responded to the answer of this question a few posts back. He can tell you just how to adj. the rear plates. Look for the reply.I wish I could tell you as the information was quite detailed! Good luck!


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Brett
BTW 88'911

I looked through the last 100 days and couldn't find it. I saw some that said what the height should be, and one that said how to adjust it by using the torsion bar splines. Not wasted time however. I saw a lot of other usefull posts. I hate to ask anyone to type so much but I would hate to screw something up. The spring plate has four bolts,(two toward the wheel, and two toward the torsion bar). I understand it's the forward most bolts near the torsion bar that adjust ride height, and the rear most two adjust toe-in and camber. If anyone can tell me how to adjust the ride height bolts I would appreciate it.

Thanks, Leon

You say that the ride height was increased by installing new Koni shocks? If they are gas shocks, maybe that would have happened. If NOT gas, it would NOT have happened -- what else did you do?

The two bolts in the trailing arm plate are not really considered more than a 'fine adjustment'. You may be able to adjust them enough, however, to raise or lower the rear depending how much you are trying to gain.

Procedure is: Jack up the rear of the car and position a jack stand along the torsion tube inside the point where the torsion bar enters the spring plate. At this point, mark a line along the plates showing their relationship to each other. The two bolts in the plate can be loosened at this point by using a special thin wrench to hold the head. (The wrench I bought from Automotion). Loosen the front bolt slightly (it is just a pivot point) and then hold the head of the rear bolt AS YOU LOOSEN IT (it WILL have pressure on it!) Rotate the head of the rear-most bolt with the wrench and you will see the plate move either up or down. If you can't get enough movement in the direction you need with this method, then you need to move a spline on the torsion bar as addressed in other posts. Good luck.

Thanks a lot Brian,
I already have the thin wrenches.
I'll give it a try this weekend. I only need to come down about 1/2" then I'll take the car to a place here in connecticut and get it weight balanced.

Thanks again,
Leon