what year did they start using adjustable swing plates

[82SC]

Well I have been thinking about buying these, but I have read some posts of cars (pre 1978) which is when I thought they started using these???

Maybe I am wrong...I plan to add these to alloy trailing arms to a pre-73 chassis

thanks

MJ

[Olivier 3.0]

yes, the first was the '77 Carrera 3.0 in Europe, and then '78SC in the USA.
I'm adjusting the ride height,and my '76 Carrera 3.0 does not have them, unfortunatly...

[Leland Pate]

I thought it was impossible to lower the rear of older cars without resetting the torsion bars....

Is this the case?

[Leland Pate]

So, I'm a little confused...

Oliver said that he was adjusting his ride height... and that his car didn't have adj. spring plates... that led me to believe for a split second that if your car has adjustible spring plats that you could adjust the ride height with the eccentric bolts or something... my mistake.


....damnit... I do NOT want to mess with those torsion bars but I'd like to lower my rears about 3/4 ".

[marcesq]

Factory adjustable spring plates first appeared in the US in '77 on the 911S. These plates have about 3/4" adjustment on either side if the eccentric is set in the middle.

Leland: If you are lucky, the plates on your car are set in the middle so that you can adjust without removing the torsion bars. Contact Paul if you need the tool for the bolts between the plates and body, a little birdie told me he is making them now.

If you need to go the torsion bar route, e-mail me as I discovered a real easy way to set the ride height that does not involve a protractor, and got mine within 1/2" which was well within the eccentric range.

[expat]

marcesq

Have you posted your method somewhere on this board? If not how about it?

Cheers
Mark

[Leland Pate]

You guys ROCK!

GOD-I-LOVE this board.

I assume you mean the Paul that also made the engine removal adapters, right?

I just need to lower it a tad in the rear... right now it looks a bit awkward to my eye.

I'll have a look at it this weekend when she goes under the knife.

[carreradpt]

Ok, now I'm really confused. It was my understanding that one could only adjust up with those bolts not Lower. I thought I read it on this BBS and also in Wayne's book. I'll have to check.

[Olivier 3.0]

leland,

I do not have excentrics to adjust the ride height, so I have to do the Tbar stuff ...

According to my experience, one spline represents about a cm (BA says 8 mm in his book); the job is a bit long but pretty easy to do.. If everything is ok (sticky Tbar, rusted bolts...)!

I've made up my mind, and I 'm going to rise my car on Sunday, because i'm a little bit too low (24'5/24), so I 'll give one spline up (I went 3 splines down last week, after the susp.job).

I reiterate the tip I used to remove my sticky Tbars: hit one (using the little hole in the tbar) to make the other going out...

[marcesq]

Leland: Yep . . . same Paul. I got the prototype. The final product will be awesome, powder coated for starters.

Mark:

Here goes. Determine desired ride height by measuring to top of wheel arc (vertical line from ground through center of wheel to top of well) and recording the difference between the current height and the new height. In my case the stock setting was 27 3/4" I wanted 25 1/2" or 2 1/4" lower.

Support control arm. Remove shock bolt. Remove 2 bolts that hold spring plate to control arm. Allow spring plate to drop to its lowest point and measure from ground to lowest point on spring plate (directly below lower bolt hole). Write this number down.

Add (or subtract) difference between current ride height and desired ride height to the measurement (add to lower car, subtract to raise car). In my case, I raised the spring plate 2 1/4" from the original measurement.

Adjust spring plate to new measurement by moving torsion bar cover up or down. If moving the cover does not acheive the new measurement, then rotate the inner splines of the torsion bar one spline and retry.

That having been said, before adjusting the ride height, the eccentrics must be set to the center of the adjustment range so you can micro adjust 3/4" on each side after putting everything back together. These two bolts are very tight. I took mine to the shop where they had a 300 lb gorilla.

If you would like to talk about it, send me your phone number in a PM.

Hope this helps.

[andymin]

i had these on my 77 carrera 3.0

took em off, cut the old bushings off (which were well worn), cleaned em up, painted em, fitted after market bushes, put em back, couldn't get the car sat right on them once we put the engine back in, overall fit was too sloppy

in the end i ordered a new factory set with the rubbers vulcanised on, the only way to get these on is to use the 'hat' and four long bolts to force them in

andy

my site

[andymin]

the guy that worked on my car had restored lots of 911's and he gave me a simple trick for installing the springplates without any measuring

if using adjustable ones each spring plate must be centered first

and obviously the car is jacked up

just install them so that the plate just touches the lower right bolt hole (the big shim thing that is welded on there)

if you have removed the torsion bars then you may need to turn the torsion bar a spline to get plate resting just right

when the weight of the car is on them again they are at the correct height

i have seen this done twice and both times the bars had been removed

regards

andrew