90S2C

I was wondering if there is anything that would make a Turbo S ride firmer than a regular turbo, other than the 20" wheels.

Continental DWS tires ordered.

Dennis C

I'm not aware of anything different. I'm running Continental DWS on my CS with 20" OEM Sport Technos. I keep my suspension set on "low" and "normal", and the ride is quite good.

seankrider

I thought the only differences between CTT and CTT-S were:
(1) Larger brakes;
(2) Heftier control arms;
(3) Larger intercoolers;
(4) More aggressive ECM mapping;

Maybe I'm forgetting something. I only remember because it seemed like CTT owners have an almost CTT-S with a few mods. Could be the control arms somehow make it more stiff?

90S2C

I think it could be the control arms, yes, if they are in fact heftier.

bfly

The control arm bushings are different. The CTTS has heavier duty bushings. That could very well account for a difference in ride/handling.

Cole

The control arms are actually identical. The bushing is the only difference. Here is a picture from when I put CTTs arms on my CTT.





The CTTs arm is on the left. dispite how it looks the hole in the bushing is actually in the exact same spot. The rubber seems stiffer and obviously the center metal piece is different.

Obviously the CTTs arm is the new one in the picture. FWIW, they cost the same.







The CTTs has a different lowering module in the car so rides a little lower and teh programming may be a bit different. That would account for a ride quality difference. They also got different tie rod ends FWIW. That seems to be the only actual phyical differences I can find so far.









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90S2C

Fantastic responses, thank you.

The ride today in city driving actually felt improved -- either my body is adjusting or the Yokohama Spec-X tires are getting rid of flat spots, or both.

hahnmgh63

Yea, the control arms are the same, just the bushings are thicker for a slightly firmer ride. Anyone replacing the bushings in their Turbo should use the Turbo S bushings as they will last longer than the standard ones. The Turbo S also has stiffer steering tie rods and a different height control unit with different front level sensors although I have no idea what changes this makes.

90S2C

Hmm...If I want to improve the city pothole ride on my DD Turbo S, should I consider the Turbo bushings?

hahnmgh63

I don't know how noticeable it would be, the regular Turbo bushings have a reputation for wearing out early, and I don't know if the bushings alone would make much of a noticeable difference. I think taller sidewall tires would be the way to go. Gentler on the wheels & suspension. The 19" wheels may be the ticket your looking for then with the softest XL rated tire you can find.

Cannoli

There is a difference with the steering rack assembly between the 2004 Turbo and the 2005 Turbo S. Next time you are at a dealership, ask for a EPC print out of the differences - there's a bunch.

deilenberger

Interesting. The bushings look identical to the fluid filled ones BMW is so enamored of in the 5 and 7 series (and probably the X5..) Lifetime on them tends to be around 50-60,000 miles. They tear and then all the goodness leaks out of them.

Any sign of staining (may be hard to see on a black control arm) from the defective bushings?

bigbuzuki

Quite possible they are fluid filled on the non Turbo S variants as one of the bushings is labelled as 'hydraulic mount' in the PET.
The Turbo S and power kit variants are labelled as 'bonded rubber mounting'.

Cole

First, there is no such thing as a 2005 CTTs. Only 2006. (yes, there re e81 power kit cars in 04/05)

From the part numbers I looked at it's only the rod ends that are different, not the rack.

You can download the PET right from the Porsche.com site and look through part numbers yourselves if you like. That is how I figured out what is "really" different vs. Rumored to be different.

Cannoli

Ops, you're write about the MY - I am wrong. The 955 Cayenne Turbo S came out in 2006.