f55 suspension 2006 c6 question
10-26-2011, 05:13 AM
#1
Instructor
Thread Starter
f55 suspension 2006 c6 question
anyone track a bone stock f55 c6 that runs perfectly normal and smooth on the street going home from the track but develops lots of vibrations under hard braking [not warped rotor pedal vibration] and hard cornering when driven on the limit on a roadcourse????
should tell you all that i only track worn, street compound tires but i do track my c6 like i stole it
should tell you all that i only track worn, street compound tires but i do track my c6 like i stole it
Last edited by frankgtb; 10-27-2011 at 10:52 AM.
10-26-2011, 10:35 AM
#2
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Member Since: Feb 2006
Location: Tucson Arizona
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Before I changed to coil-over's I ran my F55 equipped C6 on the track (with various anti-sway bars and tire combinations). I never experienced any 'track' vibration. I don't know the details of your problem but in general, you're bound to be driving the car quite-a-bit differently on the track than you would on the street. I'd eliminate the obvious things first....tire balance, alignment, etc. I'm not suggesting you go push your car on the street (to find out) but given similar inputs it's unlikely the F55 suspension would react differently on the track versus the street. Good luck.
10-26-2011, 11:37 PM
#3
Burning Brakes
are coil overs worth it?
Before I changed to coil-over's I ran my F55 equipped C6 on the track (with various anti-sway bars and tire combinations). I never experienced any 'track' vibration. I don't know the details of your problem but in general, you're bound to be driving the car quite-a-bit differently on the track than you would on the street. I'd eliminate the obvious things first....tire balance, alignment, etc. I'm not suggesting you go push your car on the street (to find out) but given similar inputs it's unlikely the F55 suspension would react differently on the track versus the street. Good luck.
10-27-2011, 07:30 AM
#4
Burning Brakes
As I put stickier rubber on the car I found the springs of the F55 suspension to be way too soft and I was rubbing the tires against the inner fender liners at all four corners -- a track with any elevation changes will bottom out the suspension and put you on the bump stops. Driving on the bump stop rubber makes you slow, so I switched to Penske double adjustable shocks with hypercoil dual rate springs and that made a huge improvement.
10-27-2011, 10:39 AM
#5
Instructor
Thread Starter
I tracked my F55 2006 C6 and never saw any vibrations either.
As I put stickier rubber on the car I found the springs of the F55 suspension to be way too soft and I was rubbing the tires against the inner fender liners at all four corners -- a track with any elevation changes will bottom out the suspension and put you on the bump stops. Driving on the bump stop rubber makes you slow, so I switched to Penske double adjustable shocks with hypercoil dual rate springs and that made a huge improvement.
As I put stickier rubber on the car I found the springs of the F55 suspension to be way too soft and I was rubbing the tires against the inner fender liners at all four corners -- a track with any elevation changes will bottom out the suspension and put you on the bump stops. Driving on the bump stop rubber makes you slow, so I switched to Penske double adjustable shocks with hypercoil dual rate springs and that made a huge improvement.
should have told you all that i only track worn, street compound tires but i do track my c6 like i stole it....
question i have no doubt a quality shock will improve ride quality over the questionable f55 and all other factory shocks but honestly did your Penske double adjustable shocks with hypercoil dual rate springs actually show a noticable decrease in laptime??????and if so by only afew tenths or seconds?
10-27-2011, 10:45 AM
#6
Burning Brakes
thx for your help ...
should have told you all that i only track worn, street compound tires but i do track my c6 like i stole it....
question i have no doubt a quality shock will improve ride quality over the questionable f55 and all other factory shocks but honestly did your Penske double adjustable shocks with hypercoil dual rate springs actually show a noticable decrease in laptime??????and if so by only afew tenths or seconds?
should have told you all that i only track worn, street compound tires but i do track my c6 like i stole it....
question i have no doubt a quality shock will improve ride quality over the questionable f55 and all other factory shocks but honestly did your Penske double adjustable shocks with hypercoil dual rate springs actually show a noticable decrease in laptime??????and if so by only afew tenths or seconds?
10-27-2011, 10:58 AM
#7
Instructor
Thread Starter
Before I changed to coil-over's I ran my F55 equipped C6 on the track (with various anti-sway bars and tire combinations). I never experienced any 'track' vibration. I don't know the details of your problem but in general, you're bound to be driving the car quite-a-bit differently on the track than you would on the street. I'd eliminate the obvious things first....tire balance, alignment, etc. I'm not suggesting you go push your car on the street (to find out) but given similar inputs it's unlikely the F55 suspension would react differently on the track versus the street. Good luck.
tracks straight and all 4 tires wearing very evenly...
no sign of shock fluid leaking or shock/suspension warning light
10-27-2011, 02:55 PM
#8
Burning Brakes
Other things to look at, besides alignment and wheel balancing
I had a bent wheel that was fine on the street and caused vibrations at track speeds (100mph+).
Most recently I had a cracked rotor that only vibrated when it was hotter than it would ever get on the street -- hairline cracks in the rotor that almost closed up when the rotor cooled down.
Also had enough rubber pickup to cause vibrations, but that showed up on the drive home too.
Most recently I had a cracked rotor that only vibrated when it was hotter than it would ever get on the street -- hairline cracks in the rotor that almost closed up when the rotor cooled down.
Also had enough rubber pickup to cause vibrations, but that showed up on the drive home too.
