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1983 911SC Suspension-torsion bars

Suspension

Vehicle Information: Model: 911 Euro SC; Year: 1983; Body Type: Coupe; Total Mileage: 92,000;

I am in the process of installing 22/28 mm torsion bars on my car. While doing this I was also thinking of replacing the bushings, however I have read that there are drawbacks to using replacement bushings(Neatrix)?Secondly,the technical specification manual I have says that the inclination of the spring strut should be 35 degrees with Bilstein shocks, which is what I have recently installed. I assume this is the measurement with the spring strut unattached to the trailing arm and simply hanging down which is achieved by adjusting the inner splines and the torsion bar cover. My question is how is this 35 degree angle affected by a greater spring rate from the 28mm bar versus the stock bar with a lower spring rate, and won't this effect the ride height unless I use a different angle setting?

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