once4all

I bought a CPO 997.2 turbo about a year ago and found the car made strange noises when coasting no gas. Brought it in for a check and found both rear coil springs were broken at the bottom. I was told this is extremely rare for a 911. The car has stock suspension and I assume all components are original at 53K miles. The springs were replaced under extended warranty. The dealership insisted the shocks are in serviceable condition because they did not see oil leak (does it mean the shocks are necessarily in decent condition??). After broken springs were replaced, I found the car still has a busy suspension at rear end on low speed and normal road conditions. I had a 997.1 4S for a long time and don't feel this turbo behaves like a 911 of that generation, suspension wise. Is it your experience the stock suspension is due for a change after 50k miles for this model (the turbos are heavier at rear than a NA engine)? Or the car might hit something at speed which caused the springs to break, and if so, is it possible that the shocks were not affected?

Anyway, I am thinking it may be time to upgrade the suspension. For mostly normal street use and some moderate tracking what would be the best all around upgrade without spending too much? I want to keep PASM adjustbility for easier resale. I am thinking about maybe a set of Bilstein B6. What is your recommendation? Thanks in advance!

Big Swole

You need to add a TPC DSC controller first and I think you'll love it.


Here a vid on how easy it is to install.

usrodeo4

Mine is OEM suspension with H&R springs but I have heard the Bilstein B6's make a huge difference, but as Big Swole said the TPC DSC has proven to make enormous steering improvements. The only reason I haven't made that move is I always drive in sport mode and from what I have seen/read the DSC changes in sport mode aren't really positive ones.

once4all

I am not interested in making it more grand touring or comfortable even if it is my DD. But the stock suspension is far less settled than my 997.2 GT3RS which is a surprise to me.

Big Swole

DSC does make it better and not more GT but is my comfortable when your not driving aggressive.

But if you want race suspension on the street and like getting beat up, that's certainly up to you.

Brainz

Try 964 RS engine mounts first (or the GT2 ones). A huge part of the rear end bounce is due to the factory engine mounts. Fix that first before you make other decisions. See my post for a full explanation -- search 964 RS and TPC and it will come up.

VID997

lliejk

I was surprised to see this post, but I did some reading and apparently it happens more frequently than I would have thought.

I have lowered my Audi S6 C4 on H&R springs and they have a reputation of breaking (at the top of the coil). Normally you can see rust in the area of the crack.

Out of curiosity was there any rust at the break point?

Ed

once4all

The mechanic worked on it did not notice rusting through and suggested maybe hard acceleration with rear engine weight distribution caused the break. Not too impressed with OEM suspension quality.

once4all

Delete

once4all

Thanks to all for your valued opinions. Time to find a reputable Indy specialist of Porsche to check out all components of suspension. Don't trust any CPO cars that "went through 111 points of inspection". They did no serious inspection just slapped on the CPO label. It's just a marketing tool for some dealerships.