Suspension upgrade options

[Eștii]

Anyone else having issues with stability at 100mph+? My 02 C2 tends to wander a bit at 100mph+. Im looking to upgarde to coilovers, fater sway bars, and strut braces if possible. I just cant seem to find coilover kits for the 02 c2. There are plenty for turbo’s and gt2/3, but for c2 i cant find any kits. I found sway bar upgrades up to 26mm though. And no luck finding strut braces either. If anyone knows of any kits, or what could be causing the wander issue let me know please.

 

 

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[hardtailer]

Öhlins, intrax, KW, Bilstein and H&R all will have coil over kits for all MYs of the 996.

Eibach for anti-roll bars (and lowering springs).

 

However, your problem most probably is not caused by worn out springs, ARB or dampers but by wrong tyre pressures, worn tyres and/or bad front/rear wheel alignment.

As long as rubber suspension bushes (in the lower control arms) are not torn they are not the root cause. Which is not to say that you'd notice an improvement in steering precision after fitting new ones.

Play in the ball joint in the rear lateral control arm could be, however as could be play in the ARB drop link joints.

But you should notice (and hear it!) that at speeds way lower than 100mph.

At 100mph aerodynamics play an important role. Are all the plastic underbody parts, especially in front of the front axle fitted?

Are you running aero kit parts at the rear without the according pieces at the front or the other way around?

 

Edited July 14, 2019 by hardtailer

[Eștii]

Car is completely stock, i purchased it a few weeks ago. New tires were fitted post purchase, so I asume the tire pressure was applyed correctly then. All the plastic panels underneath are all intact. Also no external panels have been changed, and i had an indepth and quite costly pre purchase inspection performed and all bushings, balljoints or tie rods where deemed worn. This is why im thinking it is in need of suspension upgrading. I have 2 other cars with coilovers, sway bars, and upper and lower strut braces installed and ive never had this slight wandering sensation at speeds over 100+ in them.

[hardtailer]

Assume tyre pressure is off and check yourself.

What tyres did you get?

" ...and all bushings , balljoints or tie rods where deemed worn ." -->

Replace all that was deemed worn then.  No use fitting new coil-overs etc. and keeping the worn stuff.

Should that have been a typo (i.e. all NOT worn) have the alignment checked, although I admit that is not something you notice when going ~100mph but already at 50mph or so. Same/similar goes for worn engine mounts.

 

What's the mileage btw?

Edited July 14, 2019 by hardtailer

[Eștii]

40k, and in perfect condition

[hardtailer]

Typo or not?

What tyres?

[Eștii]

Milage on the tires or what are you asking?
They are brand new michelins with a few hundred miles driven.

[hardtailer]

Typo or not? Referred to my 2nd post quoting you

" ...and all bushings , balljoints or tie rods where deemed worn ." -->

Replace all that was deemed worn then.  No use fitting new coil-overs etc. and keeping the worn stuff.

Should that have been a typo (i.e. all NOT worn )

So was "all worn" a typo that should have read "all not worn"?

 

I am asking as I am surprised why you would not replace the worn parts but instead would replace springs; ARBs and shock absorbers that were not deemed worn and don't wear in 40k miles.

 

[Eștii]

My mistake i meant they were found to be good still. No wear found on ball joints bushings or tie rods, my apology

 

[hardtailer]

Thanks for clearing this up.

Michelin are good tyres I don't suspect them to be the cause of your observations. Also after a couple of hundred miles they are run in and perform.

Apart from tyre pressure (what cold pressures did you measure yourself?)

it could be alignment or a tyre bead seating problem.

The latter can sometimes happen when the tyre is being fitted to the wheel and the bead doesn't slide over the hump on the wheel rim all the way into the seat area.

 

 

Edited July 14, 2019 by hardtailer

[Eștii]

Ill have to check the pressures and bead seating, alignment seems fine. If i let my hands off the wheel it drives perfectly straight.