Indexing question

[cleal]

sorry guys I have searched and searched and I am coming to the conclusion that I am extreemly dense. please dont beat me up too bad

So originally I jumped in without researching and pulled one of the spring plates off to replace the bushings and paid no attention to the angle. I then measured the angle on the side I did not pull off and got +- 22.5. The car is stripped and the engine and tranny is out of the car. I have used the calculator and the angle it returns seems way out from what I was expecting, I did not remove the bolt from the cover and the arm was still attached when I beleive I read 22.5. but I am on my third round here so please help.

1971 T, curb wt. 2249 (according to the manual). What angle should the spring plate be set to without being attached to the trailing arm for euro height?

[berettafan]

is the trailing arm still attached on the other side?

is the car level (applies if you are using the angle calculator)?

[cleal]

The arm was attached initially but both have been removed nowI just finished replacing the trailing arm bushings. The car is 1 degree out of level and I will compensate for that when getting setting the angle. I am just confused with the droop and all of that fun stuff. I can get the angle correct if someone can help me determine what the angle should be for the unsprung spring plate. I tried to do one side at a time so I could use the attached side for reference.

[berettafan]

Note that the indexing is a combination of inside and outside splines which are different in number. Thus indexing the inside splin x notches one way and the outside spline x notches the other can give some fairly fine adjustment.

[cleal]

ok I am dense......I did not take into consideration the shop floor being unlevel when measuring the assembled angle.

[cleal]

one last question - I should set the calulated angle with the springplate not attached to the trailing arm? correct?

[berettafan]

Yup.

It may be too late but an often recommended (for good reason) swap at this time is to SC spring plates which have a height adjustment nut. Allows for some height adjustment without reindexing (though limited).

[356RS]

To answer your question on the spring plate angle, 1971 T,E & S should be between 36 and 37 degree's. The measurement is done on the spring plate free from the control arm.

[Jesset100]

911 Spring Plate Angle Calculator