The Random E46/ZHP Question Thread

[ZHP_Brandon]

Hey guys, random question...

Does anyone know if I could run BCRacing Coils with M3 spring rates, while having Hotchkis Swaybars for a Non-M?

I’ve been eyeing a full suspension overhaul for a long time and I’m ready to take the plunge, I feel like BC’s will be more than enough for a weekend warrior like me, But I managed to inherit a set of Hotchkis Non-M sways that I’d very much like to use. The M3 spring rates sound attractive, but I’m not sure if the 2 are compatible.

If they weren’t, I’d pull the trigger on BC’s with Non-M spring rates or maybe upgrade to Swift Springs. Just want to know what I’m signing up for, any input is appreciated.


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[704sw]

Hey guys, random question...

Does anyone know if I could run BCRacing Coils with M3 spring rates, while having Hotchkis Swaybars for a Non-M?

I’ve been eyeing a full suspension overhaul for a long time and I’m ready to take the plunge, I feel like BC’s will be more than enough for a weekend warrior like me, But I managed to inherit a set of Hotchkis Non-M sways that I’d very much like to use. The M3 spring rates sound attractive, but I’m not sure if the 2 are compatible.

If they weren’t, I’d pull the trigger on BC’s with Non-M spring rates or maybe upgrade to Swift Springs. Just want to know what I’m signing up for, any input is appreciated.


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What are the M3’s F/R spring rates?

[ZHP_Brandon]

What are the M3’s F/R spring rates?

Found this info on TMS.com,
8K fronts & 12K rears


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[Will]

What are the M3’s F/R spring rates?

155 fr / 380 rr, according to FCM flatride spreadsheet (link)

[sillieidiot]

Hey guys, random question...

Does anyone know if I could run BCRacing Coils with M3 spring rates, while having Hotchkis Swaybars for a Non-M?

I’ve been eyeing a full suspension overhaul for a long time and I’m ready to take the plunge, I feel like BC’s will be more than enough for a weekend warrior like me, But I managed to inherit a set of Hotchkis Non-M sways that I’d very much like to use. The M3 spring rates sound attractive, but I’m not sure if the 2 are compatible.

If they weren’t, I’d pull the trigger on BC’s with Non-M spring rates or maybe upgrade to Swift Springs. Just want to know what I’m signing up for, any input is appreciated.


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I'd probably run less spring rate with a beefier sway bar. You could still buy it, and just swap the spring rates later.

[704sw]

I'd probably run less spring rate with a beefier sway bar. You could still buy it, and just swap the spring rates later.

8k/12k isn’t very much, is it? Isn’t that like 450/675 in lb/ft?

[ZHP_Brandon]

I'd probably run less spring rate with a beefier sway bar. You could still buy it, and just swap the spring rates later.

Mm. I have hotchkis for Non-M’s that aren’t installed on my stock suspension. I was really just hoping to know if it’s possible to run the Non-M hotchkis with “M3 suspension”. You think the spring rates provided by BC are too harsh or too soft? Maybe I’m better off getting custom Swift Springs?


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[ZHP_Brandon]

8k/12k isn’t very much, is it? Isn’t that like 450/675 in lb/ft?

I honestly know so little about this... which is sad considering I should know a lot more but suspension is a foreign land to me. I’m hoping to learn more in my suspension overhaul attempt at the end of the summer


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[Galapolis]

Is it worth getting the golden DISA? Mine committed seppuku today. I inspected it last year and it was in good shape (replaced by previous owner). I attempted to rebuild it anyway, but it turns out the rebuild kit doesn't fit on OEM. I could get a genuine one and rebuild it with the kit but at that point I might as well buy the golden one. Or would you guys say it's better to save the money and just get another OEM unit for the next 75k?

[BMWCurves]

Space saver rear tires: mine's original and my sister's new (to her) needs replacement as well. What replacement tire do you y'all have?