Available Control Arm Bushings?
11-15-2011, 02:41 PM
#1
Burning Brakes
Thread Starter
Available Control Arm Bushings?
I've determined (through our wonderful search tool) that my control arm bushings are shot. What are you using?
Ken
Ken
11-15-2011, 04:51 PM
#6
Rennlist Member
OEM at the moment, but I will be going with the Elephant Racing bushings when the time comes. They are available in stock and sport hardness.
I like the fact that they are basically an OEM bushing. No issues with greasing, etc.
I like the fact that they are basically an OEM bushing. No issues with greasing, etc.
Trending Topics
11-15-2011, 07:05 PM
#9
Not counting sway bars, a 993 has 6 rubber bushes in the front suspension and 14 rubber bushes in the rear. They are all subject to deterioration w/ time.
for track or more sporting road use the 4 shock tops are often replaced w/ monoballs. These are fairly well protected from road debris and will generally live a long life there.
there 4 rear side mounts, these are often replaced w/ 4 solid aluminum bushes especially on lowered track cars though it is also a great choice for a street car. there are no maintainance issues w/ these either.
the others are all exposed to road debris and present a different sort of problem
the other 12 bushes are all on the inner or pivot end of the various suspension arms, as such they must
1) be free to rotate through their arcs
2) maintain their design alignment
3) transmit road forces to the chassis
the choices for these 12 bushes are;
1) monoballs - these are great on a track car, very rigid, very little friction, but will be subject to more deterioration from road debris than the other choices, more than most street owners will put up w/, other down sides are increased NVH and cost
2) polyurethane - the steel shafts rotate inside the p/u bush, they are almost as rigid as monoballs, but they do require lubrication as the p/u and steel have a lot of friction w/o lube. When the lube dries up they will wear quickly & squeek. Another down side is increased NVH on the other hand they're probably the cheapest alternative and as such seem popular despite the potential issues
3) rubber - this is what the factory used. It functions by deformation not rotation so it doesn't squeek or wear, doesn't require any maintainance and has no friction. The nit to pick is that the factory uses a softer material than many would like except on the RS models where they used a harder or sport rubber compound. Note: The front 964/993 A arms have 2 bushes, a leading and trailing. Only the trailing bush on the RS/Cup is stiffer sport rubber, the leading bush is the same on all, similarly on the rear A arm only the rear is harder rubber, the front is a mono-ball like joint and is the same on all models and is not replaceable in any case. When installing, these must be indexed to the ride height or they will be subject to premature deterioration.
To me the harder RS rubber is the way to go, except on a pure race car.
11-16-2011, 11:58 AM
#14
Pro
Join Date: Sep 2009
Location: Ottawa,Ontario
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
Walrod. Can't beat them for a $100 diy. And I've had no squeaking - but in the spirit of full disclosure I do play in a metal band, and I've been listening to sirens and air horns at work for over 15 years, and I have Fister Stage III's... If a tree falls in the forest and I'm reving my stage III's - does anybody care...
