03-01-2020, 12:24 AM | #1 | ||
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Retrofitting Other Springs to Bilstein B14/B16 Coilovers
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The easier end to do is the rear, where you just need a new lower spring pad and can use 60mm, 65mm, or 2.5" coilover springs. ktw has done this with his B16 kit and went to a higher rear spring rate to achieve "flat ride." Here's what he had to say about it: Quote:
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03-03-2020, 07:42 PM | #2 |
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Nice work guys!
What length spring did you use on the front? Do you know how much bump travel there is remaining before the coils bind and how that compares to the damper bump travel remaining? I have previously tried to calculate these and was concerned that some low rate 60 mm springs would bind before the damper fully compresses (bump stops may prevent this depending on their length/stiffness, of course). Compared to the OE setup, the 60 mm adapter eats up some room, and the straight springs have less travel than the OE conical springs. I haven't tried it out though, and the proof is in the pudding! Another potential option for the front dust boot to fit under a 60 mm spring is to buy a pair of H&R boots. I was wondering whether the wide original Bilstein boot would eventually get pinched and cut when the spring compresses, so I got a pair of H&R 592-100004 for ~$20+shipping. I never had a chance to see if it will fit on a Bilstein strut and won't end up using them, so I'm happy to pass them to anyone else looking to do the same thing. |
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03-03-2020, 09:24 PM | #3 | |
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I ordered a set of skinny (blue) bilstein boots as well as some Eibach coil spring covers. They haven't arrived yet so I haven't had a chance to test them out yet.
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03-03-2020, 10:54 PM | #4 | |
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Quote:
If I ended up going to an adjustable front strut by taking my FCM tuned B6 cartridges and putting them into B14 strut bodies I'd also grab 60mm to 65mm (or 2.5") adapters so I can run larger ID springs that would accommodate dust boots better. It also would allow me to use Hyperco springs, which are generally cheaper (~$55/spring).
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03-13-2022, 05:41 PM | #6 |
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Just did this. Thanks for all the info!
I did end up using a set of rubber booth from eBay "Godspeed Coilover Strut Shock Absorber Dust Boot Cover with Bump Stop (set of 2)". Perhaps on the short side on full droop, but instructions on my Ohlins RT mentions cutting the rubber booth to similar length. I'll update my post when I install them next weekend. |
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03-14-2022, 11:17 AM | #7 |
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Did you get on a skid pad before and after the changes? I always do that before and after when making spring or ARB changes. It seems like the car would go from significant understeer to neutral or over steer now? I didn't calculate it, but that is a big change in wheel rates, front versus rear.
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10-21-2023, 02:59 PM | #8 | |
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im located in europe and have been struggling with coilbinding on my B16 kit. tough its hard to find other springs since we use the metric system and most posts here are in inches ^^ TIA! |
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10-21-2023, 04:46 PM | #9 | |
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https://www.hypercoils.com/shop/coilover-springs |
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10-25-2023, 06:15 AM | #10 | |
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