911 Shocks and questions

[DohertyCM]

74 911. Koni shocks 91133305111 in the rear.

Question how do i tell if they are bad..?

It says turn for performance...but I turn and I dont seem to be getting any resistance. Am I doing it right?

Is there replaceable rubber to go on and in the shocks? the rubber in mine are all worn out.

Also when ever I search for shocks for this vehicle it shows me a picture of a shock with a different top end. When I look at the Bilstein equip cars...it shows the correct style...does this mean my car is a Bilstein equip'ed car?
I have Koni's front and back..

It seems i truely have the bastard year car..

Are KYB shocks any good....
Bilstein?
Any others?

[djpateman]

You have to disconnect one end of a shock, and then move it through its full stroke a few times to determine if it may be bad. The shock should provide some degree of resistance both in compression and rebound. The purpose of the shock is to provide dampening action.

Bilstein are very good, and also provide some support due to being gas filled. The gas pressure is supposed to keep foaming action in the dampening oil down, thus improving such action.

Both Bilstein and Koni are rebuildable, which can be valuable if they have Porsche part #'s stamped into them, or if you want them customized to your particular suspension setup.

Kill-You-Back shocks are not highly regarded.

[DohertyCM]

The shocks do provide some type of resistance....but how do you rebuild them, where do you get the parts...rubber,seals etc..

the part number above is the part number on the shock.

Do you know how the adjustment works?

I would rather put the Koni's back in...

[SC-targa]

If they are the old Konis, not gas shocks, you need to disconnect the bottom of the shock body and fully compress the shock. Then you rotate the shock body to adjust the rebound damping. Extewnd the shock and rebolt it to the suspension.

The newer Koni gas shocks had a coaxial adjuster on the top of the shock rod that you rotated to adjust rebound damping.

Regards,

Jerry Kroeger

[djpateman]

The shocks have to be sent back to Koni or Bilstein to be rebuilt. There are no kits to DIY. Not cheap, but should be less than new cost, and retains the original part #'s that are not on the replacement parts.

http://www.koniracing.com/shopservices.html

[DohertyCM]

Thanks, I sent KONI an email. I will keep this thread posted.

[RWebb]

KYB shocks - no good....
Bilstein - top notch
Koni - good
Boge - pretty good

[DohertyCM]

here is the answer I got from Koni for rebuilding my shocks

"The cost of the rebuild will be $125/each plus parts to have it done. With parts, I would budget about $180/each as a rough estimate as we do not know what's wrong at this point. Otherwise, depending on the year, I would look at the Sport dampers that we make for the car as a replacement. Thanks."