[TargaWoods]

In my 1978 911 SC ROW at euro height, I have a steering wobble that is most aggressive at 65mph, and decreases as I go faster up until ~95. Under 60 it isn’t apparent.

I just got the wheels balanced.

Wheel bearings are tight. (Tightening them actually made the wobble more violent.)

Ball joints have no obvious play on them.

Struts are koni adjustables.

I put in turbo tie rods a month ago.

Zero Toe
0.5 deg neg camber on the front.

I will be replacing the ball joints (another pelican said that that was his ultimate fix)
I will be replacing the wheel bearings (people say that those being worn can do it)
I will be doing pads and rotors as well. (They’re very slightly warped)

Is there anything else I’m missing??

Why would tightening the bearings make the wobble more violent?

I just had the car balanced and aligned a month ago and it was a buttery smooth dream to drive. It has been a slow development for this wobble. It didn’t show up overnight but now it’s bad enough I have to deal with it. I just had the wheels balanced a few days ago and it moved the wobble higher in the speed range to where it is now. (Before it was focused from 55-65 disappearing at 70, now its 65 disappearing at 90)