Anyone else just do the front coilovers?
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
Anyone else just do the front coilovers?
I did mine almost 2 years ago. Fronts only and left the rear transverse spring in place.
Trying to find out if anyone else has noticed a "float" sort of speak along with a little vibration that can be felt thru the steering at higher speeds. >70 mph
I'm down to thinking its either that combo or maybe the spring I'm using isn't holding the wheels down. I think it was a 350 lb spring, worse case is 300lb however.
Before we even go down the road of loose front end an so forth
All new ball joints, tierod ends
Rack rebuild by turn one
New pump and all new lines
Front end alignment done 4 times
Each wheel and tire and been checked for straightness
My front spoiler did get cracked right in the center last year, don't know if that would have any effect or not.
Trying to find out if anyone else has noticed a "float" sort of speak along with a little vibration that can be felt thru the steering at higher speeds. >70 mph
I'm down to thinking its either that combo or maybe the spring I'm using isn't holding the wheels down. I think it was a 350 lb spring, worse case is 300lb however.
Before we even go down the road of loose front end an so forth
All new ball joints, tierod ends
Rack rebuild by turn one
New pump and all new lines
Front end alignment done 4 times
Each wheel and tire and been checked for straightness
My front spoiler did get cracked right in the center last year, don't know if that would have any effect or not.
Pro
Joined: Feb 2010
Posts: 677
Likes: 3
From: Metairie LA
I have only done the front coil overs (so far) and have the Z51 rear spring. I used 350 lb (I think - I'll have to check) coils on converted Bilstein shocks. It definitely felt "different" after the conversion. "Floaty" is pretty close but definitely "smoother" than the BMA lowered spring that was in there.
I recently lowered the rear some more (2 turns) and it seems even more stable.
I do have a bit of a vibration but I just figured it was the terrible run flats that are on the C5 thin spokes. They are balanced but not road force.
This has been all street miles and my own opinion, for whatever that is worth?
I recently lowered the rear some more (2 turns) and it seems even more stable.
I do have a bit of a vibration but I just figured it was the terrible run flats that are on the C5 thin spokes. They are balanced but not road force.
This has been all street miles and my own opinion, for whatever that is worth?
Thread Starter
Melting Slicks
Joined: Jan 2005
Posts: 2,658
Likes: 4
From: Clifton Park NY
Let me throw this into the mix. After doing some searching online I've come up with the term "bump steer", which maybe the problem.
Can someone educate me a bit more on roll center adjusters? and is there something available out there for the C4?
Can someone educate me a bit more on roll center adjusters? and is there something available out there for the C4?
Team Owner
Joined: Sep 2003
Posts: 25,397
Likes: 2,742
Roll center adjusters are generally "ball joint spacers" but it depends considerably on the suspension type on the car their used on.
There are also dimensions in the FSM that you could use to see how much you've actually changed the original geometry.
Last edited by WVZR-1; Sep 28, 2013 at 05:20 AM.
Heel & Toe
Joined: Oct 2011
Posts: 16
Likes: 0
From: mn
one thing I noticed with my car is at 120 or so with the shocks (stock z51) the car will float and oscillate it is kinda freaky, I believe it has more to do with compression and rebound settings then spring pressure. just my $.02
Team Owner
Joined: Sep 2003
Posts: 20,179
Likes: 673
From: Freedom is never more than one generation away from extinction.
St. Jude '03 thru '24
Yeah qws I took the front left shock off the other day cause its was bad.
Haven't noticed any difference when backing up.
johnnyjr2; your right on the money, but how old are your shocks?
If you don't know then replace them.
Haven't noticed any difference when backing up.
johnnyjr2; your right on the money, but how old are your shocks?
If you don't know then replace them.
Safety Car
Joined: Aug 2009
Posts: 3,752
Likes: 276
From: Melbourne, Victoria, Australia
Actually i had a leak on my r/h rear coilover and put the original leaf spring in the back, while waiting for the koni coilovers to come back from being reconditioned.
I have been too lazy to refit the Koni coil overs and remove the spring, am waiting for nicer weather but the good news is there is no vibration or any noticeable difference other than a smoother ride with the softer rear spring..
I have been too lazy to refit the Koni coil overs and remove the spring, am waiting for nicer weather but the good news is there is no vibration or any noticeable difference other than a smoother ride with the softer rear spring..
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