[PSUSMU]

Can anyone confirm whether E90/92 M3 springs will fit on a 335i?

[neoduffer]

Won't work.

[PSUSMU]

Originally Posted by neoduffer

Won't work.

Well, I just proved you wrong. They do fit.

Pics or it didn't happen!!1!1?!

[NocturnalEVO]

whats needed?

[PSUSMU]

Originally Posted by FCobra94

Pics or it didn't happen!!1!1?!

I installed them on a customer's car - didn't grab any photos.

Originally Posted by NocturnalEVO

whats needed?

Nothing needed. They are identical to OEM springs but ~1" shorter. I installed them on Koni struts.

[mlifxs]

Originally Posted by PSUSMU

I installed them on a customer's car - didn't grab any photos.

Nothing needed. They are identical to OEM springs but ~1" shorter. I installed them on Koni struts.

how did ride height turn out?

[vwetish]

Shorter, stiffer and interchangeable and nothing new.

[deeLow]

Very curious on ride height/comfort please update with this info.

But I'm an XI hmmmmm

[neoduffer]

Originally Posted by PSUSMU

Well, I just proved you wrong. They do fit.

Good to know.

[ajsalida]

Did not know this, very interesting. Anything fits an I fits an XI spring-wise...just scarfed a cheap set off eBay, will see how it goes.

Originally Posted by PSUSMU

I installed them on a customer's car - didn't grab any photos.

Nothing needed. They are identical to OEM springs but ~1" shorter. I installed them on Koni struts.

~1" shorter than sport or non-sport?

[DR-JEKL]

Hmm I would have thought the M3 springs would have sat higher?

All M3's I've seen have 3" or so between the tyre and the guard, whereas my 335i with m sport springs has 1"?

[ajsalida]

Looked into this a bit more. The upper strut mount and spring pad/perch area on the M3 strut is very different from ordinary e9x. There is no separate metal cup/perch like on regular e9x, it's all one thing, fairly stout. Very different design, superior IMHO, thinking about seeing if it fits non M cars.

Rears look about the same. Though M3 lower control arm where springs sits is different, spring shape looks same.

As far as front and will it fit, how much drop etc. It is beginning to look like all 3-series springs will "fit" in the sense they can be installed. The fact that the M3 spring has 1" shorter dead length doesn't mean much as far as what kind of drop (or not) you'd get on non-M car given above about strut mount. In front at least.

Aside from that what counts is the actual spring rate and dead length. Looks like wire may be thicker so overall stiffer spring, and then shorter dead length could give a mild drop but with a bit stiffer overall.

I am very intrigued by the design of the M upper strut mount vs non-M, basically they incorporate a lot of junk (separate mount/perch bunch of washers etc.) into one piece with a lot more/stiffer rubber. There's a big cupped washer that fits inside top and bottom (4 and 7 below), and another spring pad underneath (2). One concern would be is the shock rod diameter the same, stud spacing on the mount etc..

Might sharpen up front end without harshness of camber plates. We'll see.

http://www.ecstuning.com/BMW-E92-M3-...hocks/ES49621/





M3:



XI/I

Interesting. Not having looked at RealOEM myself yet, are the pieces all the same on cars with/without active dampers, etc. as well?

[PSUSMU]

Originally Posted by deeLow

Very curious on ride height/comfort please update with this info.

But I'm an XI hmmmmm

This was an XI actually. Knonsense is the owner if you wanna ask him how the car feels. He was immediately happy with the new M3 springs and Konis.

[deeLow]

@Knonsense please update with pics!!!!

[ajsalida]

Originally Posted by FCobra94

Interesting. Not having looked at RealOEM myself yet, are the pieces all the same on cars with/without active dampers, etc. as well?

Funny you mention that, I was looking hard trying to figure it out. EDC cars on some sites listed as different, but realoem does not differentiate. I need to do more research but it looks like the strut hats and smaller bits are the same EDC vs not. That diagram above shows a connector for EDC for example, but no notes. Same car specified when you go to shocks diagram shows parts for EDC and non EDC.

[avocet]

Originally Posted by PSUSMU

This was an XI actually. Knonsense is the owner if you wanna ask him how the car feels. He was immediately happy with the new M3 springs and Konis.

Ah this makes sense. There was some threads awhile back saying m3 springs would be too high. So they would be higher than a sport package or even standard, but somewhat lower then an xi.

[Cloud9blue]

Originally Posted by ajsalida

Looked into this a bit more. The upper strut mount and spring pad/perch area on the M3 strut is very different from ordinary e9x. There is no separate metal cup/perch like on regular e9x, it's all one thing, fairly stout. Very different design, superior IMHO, thinking about seeing if it fits non M cars.

Rears look about the same. Though M3 lower control arm where springs sits is different, spring shape looks same.

As far as front and will it fit, how much drop etc. It is beginning to look like all 3-series springs will "fit" in the sense they can be installed. The fact that the M3 spring has 1" shorter dead length doesn't mean much as far as what kind of drop (or not) you'd get on non-M car given above about strut mount. In front at least.

Aside from that what counts is the actual spring rate and dead length. Looks like wire may be thicker so overall stiffer spring, and then shorter dead length could give a mild drop but with a bit stiffer overall.

I am very intrigued by the design of the M upper strut mount vs non-M, basically they incorporate a lot of junk (separate mount/perch bunch of washers etc.) into one piece with a lot more/stiffer rubber. There's a big cupped washer that fits inside top and bottom (4 and 7 below), and another spring pad underneath (2). One concern would be is the shock rod diameter the same, stud spacing on the mount etc..

Might sharpen up front end without harshness of camber plates. We'll see.

http://www.ecstuning.com/BMW-E92-M3-...hocks/ES49621/





M3:



XI/I

Those top mounts should fit any non-M struts as well, as they all share the same thread size and diameter. The difference is that the M struts have a wider shock body, along with a different front hub. As a matter of fact, most of the M3 coilovers uses the same struts as the non-m kit, but just add on a spacer to make up for the difference in outer strut body diameter.

[deeLow]

Originally Posted by Cloud9blue

Those top mounts should fit any non-M struts as well, as they all share the same thread size and diameter. The difference is that the M struts have a wider shock body, along with a different front hub. As a matter of fact, most of the M3 coilovers uses the same struts as the non-m kit, but just add on a spacer to make up for the difference in outer strut body diameter.

I wonder if it would be worth it to use these top hats/assembly instead of just buying new non m parts especially if they fit. I also wonder if they would contribute any if at all to a lower stance.

Still very interested to see what these drop an XI as m3's that I see always look much lower than non M. Could be an illusion with the bigger wheels and more aggressive fenders though.

[ajsalida]

Originally Posted by deeLow

I wonder if it would be worth it to use these top hats/assembly instead of just buying new non m parts especially if they fit. I also wonder if they would contribute any if at all to a lower stance.

Still very interested to see what these drop an XI as m3's that I see always look much lower than non M. Could be an illusion with the bigger wheels and more aggressive fenders though.

This is what I was thinking. Going to wait to get the springs first, do some more research, then decide. I will measure XI, Eibach pro-kit, ZSP vs OEM M3 springs and post it up.