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Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 11-01-2010, 01:39 AM   #1
Mango
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Whats the best spring to pair with Bilstein Sports?

I am ready to pull the trigger on H&R Sports 29484 springs... but wanted to check with you guys first. Daily driven car but I don't mind a firm ride. I just don't want it to be bouncy.
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Old 11-01-2010, 05:13 AM   #2
franz
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Bounce is controlled by dampers, what shocks and struts are you planning on pairing them with?
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Old 11-01-2010, 09:33 AM   #3
Mango
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As the title says.. Bilstein Sports.. lol. I believe springs affect wheel bounce too. I had DDM Tuning Springs and Bilstein Sports on my E36 M3 and it was bouncy over bumps.
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Old 11-01-2010, 02:36 PM   #4
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Originally Posted by E46Mango View Post
As the title says.. Bilstein Sports.. lol. I believe springs affect wheel bounce too. I had DDM Tuning Springs and Bilstein Sports on my E36 M3 and it was bouncy over bumps.
No, bounce really has nothing to do with springs and everything to do with dampers. If your dampers don't have enough rebound damping relative to the spring rate, then you end up with a bouncy ride.

Frequently people who have springs that are too soft and ride height too low end up going through their suspension and hitting the bump stops. If you hit the bump stops, then your spring rates shoot way up. Another thing is if you have crappy springs that bind too soon, and when the spring completely binds, the spring rate goes to infinity.

So either if you hit your bump stops or if you have crappy springs that bind, no dampers will be able to keep your ride from being bouncy.

I had H&R Race springs and Bilstein Sport dampers, and the ride was firm but not at all bouncy.
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