progressive rate springs -30mm ride height 996 C2?

[chillo]

Hi
fairly new to PH but have lurked around before!

i have been looking at getting some progressive rate springs for my 04 996C2 as i think it sits too high on standard suspension. -30mm is just what i'm looking for and the springs are available for about £200+vat
Will the steering/track/toe? etc need re setting up as well?
anyone gone this route before?
Will the ride suffer much?
I managed to get it on 3 wheels on a trackday at Elvington earlier this year!

Simon

[DanH]

Yes the geo will need to be redone. -30mm will require fairly stiff springs and if you have a front splitter, expect for it to interface with ramps etc. I ground my RS's splitter, which is -30mm on ramps and some yomps on the road etc.

Firm enough springs won't do a great deal for the ride either, you are right. How about -20mm like the turbos etc?

[Raven Flyer]

Look at it this way. Standard travel is around 75mm, so if you go for just 40mm of travel, the springs will need to be 75/45x spring rate to stop it bottoming out.

This will be very compromised on the road and not much fun down a typical country lane. Spring rates that hard will have the car airbourne over a lot of the bumps.

Great for track use, but a horrible journey there and back... and most driving until the next track day.

You don't say how old you car is but suspension on most cars is junk by 60k. A full set of fresh stuff with the same ride height, or a small drop, will transform an older car.

[chillo]

been doing a bit of looking into this and have had a chat with a good independant dealer.

The springs are a bit firmer but mainly just have shorter travel.

Has anyone done this or know of anyone that has?

would like to hear before i jump into what is the unknown at the moment!

[chillo]

anyone??

[leeme3]

Sorry for slightly hi-jacking the thread.....

Raven Flyer said:

You don't say how old you car is but suspension on most cars is junk by 60k. A full set of fresh stuff with the same ride height, or a small drop, will transform an older car.

Is this true? Do you mean change the whole lot... springs, dampers, bushes etc etc etc or just springs?

[Raven Flyer]

Most cars will drive OK on old suspension but by the time they have done 60k, the damper valving will be well worn and the springs will have dropped and lost a lot of their elasticity. Because the springs will drop at differing amounts, the corner weight distribution will be out too.

Even replacing with standard units will offer a good improvement.

The more expensive aftermarket units can be rebuilt and most manufacturers recommend that this is done every 20-30k.

Bushes should certainly be replaced by this sort of mileage. The difference between being tight and being OK is a immaterial for normal commuting, but for track use and serious fast road driving the improvements will be considerable. Tracking and camber will be held to what they are set at, rather than a degree of play either way.

[peterpeter]

chillo said:

Hi <br/>fairly new to PH but have lurked around before! <br/> <br/>i have been looking at getting some progressive rate springs for my 04 996C2 as i think it sits too high on standard suspension. -30mm is just what i'm looking for and the springs are available for about £200+vat <br/>Will the steering/track/toe? etc need re setting up as well? <br/>anyone gone this route before? <br/>Will the ride suffer much? <br/>I managed to get it on 3 wheels on a trackday at Elvington earlier this year! <br/> <br/>Simon

i did this on my old c2.

it made a huge difference and really didnt ruin the ride at all.

Lower centre of gravity and firmer springs reduced body roll dramatically to a level that should have been the norm for a c2. (it was way to soft and wallowy as standard)

Needed geo on setup. thats all.

and it felt much better on trackdays.

Im sure the shocks would have worn out quicker, but it was well worth it.