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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > E36 M3 To E92 335i



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      03-28-2016, 12:25 PM   #1
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E36 M3 To E92 335i

I recently purchased a e92 335i and I love the car. Its quick and looks good. The only issue I am noticing is that the ride is bouncy/floaty when I'm driving on the highway. The E36 M3 I had would give great feedback on the road I was on, but felt way more planted. Is this a spring and shock issue or more of a bushings issue. I know the two cars wont ride exactly the same, but it sucks that the 20 year old car even on OEM suspension feels better than the e92.
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      03-28-2016, 01:07 PM   #2
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Get some coilovers and you'll have solved your issue.
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      03-28-2016, 01:13 PM   #3
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It's a 400lbs issue called PHYSICS. As the car got bigger, wider, longer, taller and HEAVIER, it is simply impossible to override the laws of physics. Despite all the advancement in chassis technology and massive increase in torque and HP, a bigger, heavier car simply need more springs and dampers to keep it planted. But the problem with more springs and dampers is the ride gets stiffer, to a point where it's uncomfortable for your average user.

Think about it. The E9x is as big as the E39 in nearly every dimension, and probably just as heavy if not more. Imagine the difference in ride between the E39 and the E36 and you'll have some idea as to why the E9x is floaty and bouncy by comparison.
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      03-28-2016, 01:30 PM   #4
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Is your E92 even an M-Sport model? Either way, you can't compare it to an M3.
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      03-28-2016, 01:59 PM   #5
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Originally Posted by Ravenseal View Post
Is your E92 even an M-Sport model? Either way, you can't compare it to an M3.
Yes it is an M-Sport model. I know it's not far to compare to an M3, but I was just wondering if there is a way to get to ride like it. i.e., Coilover? Springs and Shocks? Different bushings?
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      03-28-2016, 02:47 PM   #6
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Originally Posted by bmuum3 View Post
Yes it is an M-Sport model. I know it's not far to compare to an M3, but I was just wondering if there is a way to get to ride like it. i.e., Coilover? Springs and Shocks? Different bushings?
Yeah. Upgrade to coilovers and M3 suspension components: https://www.ecstuning.com/ES2601971/
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      03-28-2016, 05:59 PM   #7
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Yeah the stock sport suspension sucks......get some non run-flat tires and at least some springs and shocks such has H&R springs/Bilstein or Koni shocks at least.....coilovers even better....they made the suspension soft from the factory to mitigate the harsh ride caused by the run-flat tires. That's my theory anyway and others have said the same....
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      03-28-2016, 09:19 PM   #8
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Quote:
Originally Posted by bmuum3 View Post
I recently purchased a e92 335i and I love the car. Its quick and looks good. The only issue I am noticing is that the ride is bouncy/floaty when I'm driving on the highway. The E36 M3 I had would give great feedback on the road I was on, but felt way more planted. Is this a spring and shock issue or more of a bushings issue. I know the two cars wont ride exactly the same, but it sucks that the 20 year old car even on OEM suspension feels better than the e92.
Any suspension refresh on your 2010? How many miles? What tires are you running? The E92 suspension is not perfect, but I wouldn't describe it as floaty/bouncy on the highway.
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      03-29-2016, 12:38 AM   #9
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Quote:
Originally Posted by The HACK View Post
It's a 400lbs issue called PHYSICS. As the car got bigger, wider, longer, taller and HEAVIER, it is simply impossible to override the laws of physics. Despite all the advancement in chassis technology and massive increase in torque and HP, a bigger, heavier car simply need more springs and dampers to keep it planted. But the problem with more springs and dampers is the ride gets stiffer, to a point where it's uncomfortable for your average user.

Think about it. The E9x is as big as the E39 in nearly every dimension, and probably just as heavy if not more. Imagine the difference in ride between the E39 and the E36 and you'll have some idea as to why the E9x is floaty and bouncy by comparison.
I don't think the weight is the ONLY reason it's different. Run flats, hollow suspension bushes and much less spring rate are differences that are correctable.

OP, mirror the e92 M3 as closely as possible to obtain a ride more like your e36.

Loved my 98.5 e36 M3!
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      03-30-2016, 11:02 AM   #10
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Went with KW1 coilovers. Can't wait to get them on.
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      03-30-2016, 11:13 AM   #11
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Quote:
Originally Posted by The HACK View Post
It's a 400lbs issue called PHYSICS. As the car got bigger, wider, longer, taller and HEAVIER, it is simply impossible to override the laws of physics. Despite all the advancement in chassis technology and massive increase in torque and HP, a bigger, heavier car simply need more springs and dampers to keep it planted. But the problem with more springs and dampers is the ride gets stiffer, to a point where it's uncomfortable for your average user.

Think about it. The E9x is as big as the E39 in nearly every dimension, and probably just as heavy if not more. Imagine the difference in ride between the E39 and the E36 and you'll have some idea as to why the E9x is floaty and bouncy by comparison.
That's not really it. An E39 feels much more planted vs. an E90 as well.

Obviously, it's never going to feel as nimble, but that's not what he's really talking about.

It's the super low spring rates, the wide spread use of unbelievably soft bushings, etc. that contribute to the widely-lamented floaty feeling of a stock E90.

A result of 1. a change in the marketplace demands and 2. the use of OE runflats, forcing them to soften everything else up to accommodate them.
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      03-30-2016, 04:24 PM   #12
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Yeah, that's the only thing that lets the car down, is the suspension. Harsh on crap roads. Feels like no dampening at all. And floaty at high speeds. Everybody has been in the same boat mate. You will be well happy once you get ur new suspension on. Enjoy.
Oh, and get rid of the run flats asap ;-)
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      03-31-2016, 09:07 AM   #13
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Yea once the KW's go on then I need to find a new set of wheels and put some new rubber on them. Wanted to go 19's but I'm sure that won't help the ride quality with the smaller sidewall.
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      03-31-2016, 12:48 PM   #14
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      03-31-2016, 02:14 PM   #15
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Quote:
Originally Posted by Ravenseal View Post
Yeah. Upgrade to coilovers and M3 suspension components: https://www.ecstuning.com/ES2601971/
Bushings will be the icing on the cake afterwards. Subframe and diff solid bushings make me love driving my car.
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      04-04-2016, 10:44 AM   #16
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So upgrade to m3 diff subframe bushings? Anything else? Control arms?
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      04-04-2016, 11:13 AM   #17
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Quote:
Originally Posted by bmuum3 View Post
So upgrade to m3 diff subframe bushings? Anything else? Control arms?
M3 CA set.
Solid bushings, unless you're a woman, then poly or M3 will work.
Thicker sway bars
Proper set of springs with desired spring rate.

Drive and see if that doesn't feel a bit more like home.
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      04-05-2016, 05:34 PM   #18
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Quote:
Originally Posted by mmmnot View Post
M3 CA set.
Solid bushings, unless you're a woman, then poly or M3 will work.
Thicker sway bars
Proper set of springs with desired spring rate.

Drive and see if that doesn't feel a bit more like home.
Sounds good.

The Kw1 arrived today. Hopefully I it's not frigid this weekend and I can install them.
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