1999 c4 spring change
10-20-2005, 01:01 AM
#1
3rd Gear
Thread Starter
Join Date: Oct 2005
Location: Victorville, CA
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
1999 c4 spring change
Just finished a spring change on a 99 C4. Used the H&R's. It's easier than it looks. The fronts are a little tougher (axles) but not difficult. The rears are a breeze. It's a good time to install SS brake lines. You're already in there.
10-21-2005, 04:26 AM
#4
Rennlist Member
Congrats - that doesn't sound easy for everyone to do - why did you change? Do you track the car or were you just looking for a tighter ride on the road. My 2000 C2 has 40,000 miles, and if I start doing mods, I would likely start with the suspension, but I haven't learned enough yet about the best way to go. I only plan on driving on the road.
10-21-2005, 07:54 AM
#5
Originally Posted by BlackCab996
Congrats - that doesn't sound easy for everyone to do - why did you change? Do you track the car or were you just looking for a tighter ride on the road. My 2000 C2 has 40,000 miles, and if I start doing mods, I would likely start with the suspension, but I haven't learned enough yet about the best way to go. I only plan on driving on the road.
Oh, and after you upgrade your suspension, PSE should be next!
10-22-2005, 01:23 PM
#6
3rd Gear
Thread Starter
Join Date: Oct 2005
Location: Victorville, CA
Posts: 3
Likes: 0
Received 0 Likes
on
0 Posts
BlackCb996
The car had the US spec M030 and aero kit on it as a factory option but it needed to lowered. They are designed to be run at a lower ride height than US specs. The springs rates were just a little soft for my taste. The higher ride height also allows more air under the front of the car which contributes to drag and an "areo" push at high speeds. Lowering the car places the suspension at the "proper" angles, improves the aero, lowers the center of gravity, etc., which brings the car more in line with the design. I haven't tracked the car yet. I'm building a dedicated car for that (1977 911S). I may track the car at some POC events up at Willow Springs but just to play. At 3100 lbs the car weighs approximately what a NASCAR Cup car weighs. So a 996 is really a Grand Touring car and requires a lot of weight reduction ( 500-700 lbs) to get down to "nimble" status. Also, to really get the suspension in line with track car use the springs, shocks, sway bars, and struts would need to be stiffened up to a point that the streetabiliy of the car would be compromised. Minor improvements, to bring the car in line with the orginal design, will yeild enough improved driveablilty for most owners.
The car had the US spec M030 and aero kit on it as a factory option but it needed to lowered. They are designed to be run at a lower ride height than US specs. The springs rates were just a little soft for my taste. The higher ride height also allows more air under the front of the car which contributes to drag and an "areo" push at high speeds. Lowering the car places the suspension at the "proper" angles, improves the aero, lowers the center of gravity, etc., which brings the car more in line with the design. I haven't tracked the car yet. I'm building a dedicated car for that (1977 911S). I may track the car at some POC events up at Willow Springs but just to play. At 3100 lbs the car weighs approximately what a NASCAR Cup car weighs. So a 996 is really a Grand Touring car and requires a lot of weight reduction ( 500-700 lbs) to get down to "nimble" status. Also, to really get the suspension in line with track car use the springs, shocks, sway bars, and struts would need to be stiffened up to a point that the streetabiliy of the car would be compromised. Minor improvements, to bring the car in line with the orginal design, will yeild enough improved driveablilty for most owners.
