BC racing coilover spring rates? - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 04-11-2014 Thread Starter
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BC racing coilover spring rates?

I have a 2013 gt and I want to lower my car as low as possible but still be able to daily. I'm not that concerned about ride quality but I definitely don't want 18k and 20k nothing ridiculous because like I said it's my daily and I'd like to be able to walk after I'm done driving. The reason that I think I should get a stiffer spring rate then 8k and 10k is because I'm not sure if I am going to have issues bottoming out with rates that low. Any advice or personal experience would be greatly appreciated.

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post #2 of 9 (permalink) Old 04-12-2014
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Honest advice: don't waste your money. BC dampers are just not that good. They'll give a killer stance and generally look great, but the ride and handling characteristics are not nearly as good as you'd have with a decent set of stock-style dampers and lowering springs.

On spring rates: 10k (550#) is too much for anything short of a very good monotube racing shock that's not made in China, and too much for a DD. I have 550# springs on my car, but it's not a DD, and I wouldn't DD it as it sits. I'd probably go for an 8k (450#) front spring for a DD setup, and probably a 3k (170#) for the rears.


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post #3 of 9 (permalink) Old 04-14-2014 Thread Starter
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Originally Posted by csamsh View Post
Honest advice: don't waste your money. BC dampers are just not that good. They'll give a killer stance and generally look great, but the ride and handling characteristics are not nearly as good as you'd have with a decent set of stock-style dampers and lowering springs.

On spring rates: 10k (550#) is too much for anything short of a very good monotube racing shock that's not made in China, and too much for a DD. I have 550# springs on my car, but it's not a DD, and I wouldn't DD it as it sits. I'd probably go for an 8k (450#) front spring for a DD setup, and probably a 3k (170#) for the rears.
Do you think they'll be better then the eibach shocks and struts I have. I think they're the sportlines. And I don't know that much about coils so why would 10k be too much I'm the rear. I only said 8k and 10k because that's what BC had recommended when I emailed them asking what they thought I should run.

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post #4 of 9 (permalink) Old 04-14-2014
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Do you think they'll be better then the eibach shocks and struts I have. I think they're the sportlines. And I don't know that much about coils so why would 10k be too much I'm the rear. I only said 8k and 10k because that's what BC had recommended when I emailed them asking what they thought I should run.
No I don't think they'd be better from a performance or ride point of view. 10k is too much for the rear because it will make the rear WWAAAAYYY too stiff. Oversteer city.

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post #5 of 9 (permalink) Old 04-16-2014 Thread Starter
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No I don't think they'd be better from a performance or ride point of view. 10k is too much for the rear because it will make the rear WWAAAAYYY too stiff. Oversteer city.
Right now I have SR performance springs. They're only 180 bucks so I never expected them to be the best but the spring rates on them are 230 front and 200 rear. I am looking to go low and try to get rid of almost all of the wheel gap I can but I also still need to be able to drive the car to work everyday haha. Stiffness and harsh ride isn't really an issue but like you said 10k rear would be too much. Would I be better off doing a 8k/3k as you said and just stiffining the dampening on the coils?

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post #6 of 9 (permalink) Old 04-16-2014
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Right now I have SR performance springs. They're only 180 bucks so I never expected them to be the best but the spring rates on them are 230 front and 200 rear. I am looking to go low and try to get rid of almost all of the wheel gap I can but I also still need to be able to drive the car to work everyday haha. Stiffness and harsh ride isn't really an issue but like you said 10k rear would be too much. Would I be better off doing a 8k/3k as you said and just stiffining the dampening on the coils?
More rebound isn't necessarily better...you'd just have to play with various settings, seeing what feels the best. I usually turn my dampers down to ~15% for street driving, and increase them for track/autox, but only as much as I need to get good handling characteristics. I try and run the least amount of rebound possible without inducing understeer on entry or exit. Too much rebound (stiffness) just make your car go on ice skates.

8k/3k is a good street setup. Just make sure the springs are long enough to give you some travel in the suspension.

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post #7 of 9 (permalink) Old 04-20-2014 Thread Starter
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More rebound isn't necessarily better...you'd just have to play with various settings, seeing what feels the best. I usually turn my dampers down to ~15% for street driving, and increase them for track/autox, but only as much as I need to get good handling characteristics. I try and run the least amount of rebound possible without inducing understeer on entry or exit. Too much rebound (stiffness) just make your car go on ice skates.

8k/3k is a good street setup. Just make sure the springs are long enough to give you some travel in the suspension.
If I'm going really low wouldn't more suspension travel be worse? Wouldn't that cause more rubbing issues?

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post #8 of 9 (permalink) Old 04-20-2014 Thread Starter
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More rebound isn't necessarily better...you'd just have to play with various settings, seeing what feels the best. I usually turn my dampers down to ~15% for street driving, and increase them for track/autox, but only as much as I need to get good handling characteristics. I try and run the least amount of rebound possible without inducing understeer on entry or exit. Too much rebound (stiffness) just make your car go on ice skates.

8k/3k is a good street setup. Just make sure the springs are long enough to give you some travel in the suspension.
But I assume you are saying some suspension travel is needed for better performance correct?

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post #9 of 9 (permalink) Old 04-20-2014
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But I assume you are saying some suspension travel is needed for better performance correct?
Yes. Suspension doesn't really work if it can't move

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