C6 coilover spring rates
Thread Starter
Instructor
Joined: Jul 2018
Posts: 146
Likes: 9
C6 coilover spring rates
For those guys running C6's with coilovers and no leafs - what spring rates on the coilovers you guys running Fr/Rr?
Plan on going with good front splitter and rear wing - that will be set up for max downforce - so right now thinking around 800# front and 900# rear
Plan on going with good front splitter and rear wing - that will be set up for max downforce - so right now thinking around 800# front and 900# rear
Max G’s
Joined: Nov 2008
Posts: 2,751
Likes: 79
From: Monroe OH
NCM Sinkhole Donor
I assume you are talking about 800lb springs per corner front and 900lb springs per corner rear? If so I think you are too high. Probably need to start out with 650lb front and 750lb rear.
Melting Slicks
Joined: Nov 2008
Posts: 2,031
Likes: 159
From: Daytona Beach FL
Im currently at 1000 front, 750 rear. About to test 1100 front. ST1/TT! Trimed car in NASA world, full LG aero front and rear
General rule of thumb I believe is add up your rates and get them to equal weight of car with you plus downforce... Its a generalization and isnt perfect....
General rule of thumb I believe is add up your rates and get them to equal weight of car with you plus downforce... Its a generalization and isnt perfect....
Le Mans Master
Joined: Apr 2001
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Thread Starter
Instructor
Joined: Jul 2018
Posts: 146
Likes: 9
My other car - which will be about 800 lbs lighter will have 950 up front and 800 or so in rear - yes easy to swap out springs.
the C6 will also be full time track car - so the 1000-1100 range sounds right - 850 ish rear or more. Car had way too much roll on stock leafs with Pfadt heavy sways - in #1 hole on front and #2 in rear - so about as stiff as one can get.
anyone have input on T1 bar vs. Pfadt heavy rate - which is stiffer?
the C6 will also be full time track car - so the 1000-1100 range sounds right - 850 ish rear or more. Car had way too much roll on stock leafs with Pfadt heavy sways - in #1 hole on front and #2 in rear - so about as stiff as one can get.
anyone have input on T1 bar vs. Pfadt heavy rate - which is stiffer?
Max G’s
Joined: Nov 2008
Posts: 2,751
Likes: 79
From: Monroe OH
NCM Sinkhole Donor
Too stiff springs will not allow weight transfer to the outside tire. Plus higher rates will have car sitting higher. You want the lowest ride height you can get. Corner balance the car then use formula on Hyperco website to come up with rates. Then, since you are running aero, figure how much are downforce you actually have as an average for the Track.
Melting Slicks
Joined: May 2009
Posts: 3,083
Likes: 1,230
From: Chalfont PA
My other car - which will be about 800 lbs lighter will have 950 up front and 800 or so in rear - yes easy to swap out springs.
the C6 will also be full time track car - so the 1000-1100 range sounds right - 850 ish rear or more. Car had way too much roll on stock leafs with Pfadt heavy sways - in #1 hole on front and #2 in rear - so about as stiff as one can get.
anyone have input on T1 bar vs. Pfadt heavy rate - which is stiffer?
the C6 will also be full time track car - so the 1000-1100 range sounds right - 850 ish rear or more. Car had way too much roll on stock leafs with Pfadt heavy sways - in #1 hole on front and #2 in rear - so about as stiff as one can get.
anyone have input on T1 bar vs. Pfadt heavy rate - which is stiffer?
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Thread Starter
Instructor
Joined: Jul 2018
Posts: 146
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a former ST2 guy I talk with had perfect corner balancing - 50/50 - 45fr/55Rr distribution - ran 900lbs front and 700lbs rear - car weight 2850lbs. Car had full aero package.
He was upping to 950-1000 front and 750-800 rear - car really rolled too much. He moved and ending up selling car before making the additional changes.
Hence why 1000-1100lbs front and 800-900 rear sounds right for 3200 lbs car with 50/50 corner balancing 50fr/50Rr distribution with full aero.
Easy to change as well - doesn't take much lean to weight transfer to outside wheels - less than 1/2" roll is plenty (data out there on this)
He was upping to 950-1000 front and 750-800 rear - car really rolled too much. He moved and ending up selling car before making the additional changes.
Hence why 1000-1100lbs front and 800-900 rear sounds right for 3200 lbs car with 50/50 corner balancing 50fr/50Rr distribution with full aero.
Easy to change as well - doesn't take much lean to weight transfer to outside wheels - less than 1/2" roll is plenty (data out there on this)