Steering Wheel Shake at 70-80 mph?

[WhipE350]

I did all my shocks over Dec and in the end had to have an alignment...it may not fix the shaking, but you really should get one, I was very happy after mine, car was totally different. If you find a good Indy, while they are doing it they can check for anything being lose.

[dirkdiggler]

Whats the average cost for an alignment??

[Gforrest2]

Originally Posted by dirkdiggler

Whats the average cost for an alignment??

I'd like to know that too and can any shop do it? Like your local tire store that advertises $59 alignments or should you go to a Porsche specialist?

[jhandy]

Dirk-
Reading the first post again, It really sounds like something is loose, because of what you said "by holding the wheel it seems to stop"
If it was a bent wheel, or rotor, or axle....you would not be able to fight it. My wheel spacers shook so strongly if you tried to hold the wheel hard, it would shake your shoulders.
try something simple......jack it up take each tire off, and check the axle nut torque, and put the wheel back on correctly torquing the studs.
I bet its either the axle nut or the wheels. Look for missing lead.

Also you should get the alignment specs and bring them to your shop. Brakecheck can align a porsche, but I doubt that they will know what settings to shoot for.

When I lowered mine, the dealer printed out for me target settings depending on how I wanted to drive it and how fast I wanted to replace the tires.

IIRC the choices he gave me where "factory, street/sport, track"

each choice used the tires progressively more. I chose track, and the car stuck to the road, but I went through two sets of tires in 15000 miles. The camber/toe was so aggressive that it wore out the inner shoulders leaving the outer edge 50% used.

I had it reset to factory values, and drive slower, and use much less rubber.

[WhipE350]

I used Eurowerks in Charlotte NC, it was $180. I was impressed overall with their work, I watched the whole thing. It took a while to do so I thought the price was fair. They had an expensive setup just for doing the alignment.

[dirkdiggler]

$180 isnt bad

I guess I will take off each wheel and inspect everything again........ugghhhhh

[Johnny Danger]

Have you looked into road force balancing ? My experience has always been that dynamic balancing is simply not enough; especially when you getting into larger diameter wheels like 18 and 19 inch .