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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 03-02-2014, 08:30 PM
Drewsome Drewsome is offline
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E90 to F30: wow!

I've been using dealer loaner -- 2014 F30. My car is a 2010 E90.

As to be expected, there are many differences in the driving experience. But one which immediately jumped out was that the F30 absorbed potholes and road irregularities FAR better than my car with OEM Continental RFTs.

The F30 has Michelin Primacy MXM4 tires on it. Can these tire be the reason for the much more civilized, less jarring ride?

Also, when I looked up these Michelins up on tirerack.com, they are NOT listed as RFTs. But how could this be? I thought BMW always puts RFTs on the 328i. If the Michelins are go-flats, then this might explain the smoother ride.

Would love to get this same road feel on E90 -- what do you guys think?
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  #2  
Old 03-02-2014, 09:10 PM
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tturedraider tturedraider is offline
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They're RFTs. The difference is newer generation RFTs and changes to the suspension.
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  #3  
Old 03-02-2014, 10:10 PM
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I drove few times my daughter 320i and must admit that this is fun to drive car with enough power (185hp) .
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  #4  
Old 03-03-2014, 01:10 AM
gcreese gcreese is offline
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The F30 also includes a major change to the suspension. So while switching tires may help a bit, just changing the tires won't get you into F30 territory.
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  #5  
Old 03-03-2014, 01:54 AM
Phil325i Phil325i is offline
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Originally Posted by gcreese View Post
The F30 also includes a major change to the suspension. So while switching tires may help a bit, just changing the tires won't get you into F30 territory.
Any ideas what those suspension changes are...and whether they're a possible retro fit to the E9X?
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  #6  
Old 03-03-2014, 03:14 AM
hondo402000 hondo402000 is offline
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Quote:
Originally Posted by Phil325i View Post
Any ideas what those suspension changes are...and whether they're a possible retro fit to the E9X?
you could change the springs, if you can find a softer set, if thats possible
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  #7  
Old 03-03-2014, 04:07 AM
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Chris90 Chris90 is offline
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Originally Posted by Phil325i View Post
Any ideas what those suspension changes are...and whether they're a possible retro fit to the E9X?
Go Koni FSDs shocks and non-run flats. Should get you close to the F30's ride quality. Shouldn't have to change the springs.
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Old 03-03-2014, 05:00 AM
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captainaudio captainaudio is offline
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Originally Posted by Chris90 View Post
Go Koni FSDs shocks and non-run flats. Should get you close to the F30's ride quality. Shouldn't have to change the springs.
+1

I have the sport suspension with Koni FSDs and non RFTs. Better handling than stock and much better ride quality.




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  #9  
Old 03-03-2014, 05:33 AM
fdriller9 fdriller9 is offline
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Springs mainly set ride height. You want softer shocks for a smoother ride.
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  #10  
Old 03-03-2014, 05:43 AM
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thekurgan thekurgan is offline
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How many miles are on your E90 tires vs the F30?
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  #11  
Old 03-03-2014, 06:56 AM
Watchme Watchme is offline
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don't forget teh brand new bushings on all suspension parts that will have 0 clearance with metal parts.
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  #12  
Old 03-03-2014, 07:00 AM
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floydarogers floydarogers is offline
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Quote:
Originally Posted by Phil325i View Post
Any ideas what those suspension changes are...and whether they're a possible retro fit to the E9X?
One thing you may not have noticed is that the tires on F3x are slightly taller than on E9x. The E9x (typical common size) has 225/45R17, while the F3x has 225/50R17. All other tires on F3x are similarly a bit taller due to higher profile.
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Old 03-03-2014, 07:17 AM
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Chris90 Chris90 is offline
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Originally Posted by floydarogers View Post
One thing you may not have noticed is that the tires on F3x are slightly taller than on E9x. The E9x (typical common size) has 225/45R17, while the F3x has 225/50R17. All other tires on F3x are similarly a bit taller due to higher profile.
Good catch, didn't know that. My E36 was 225/50R16.
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  #14  
Old 03-03-2014, 07:29 AM
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need4speed need4speed is offline
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Quote:
Originally Posted by Drewsome View Post
I've been using dealer loaner -- 2014 F30. My car is a 2010 E90.

As to be expected, there are many differences in the driving experience. But one which immediately jumped out was that the F30 absorbed potholes and road irregularities FAR better than my car with OEM Continental RFTs.

The F30 has Michelin Primacy MXM4 tires on it. Can these tire be the reason for the much more civilized, less jarring ride?

Also, when I looked up these Michelins up on tirerack.com, they are NOT listed as RFTs. But how could this be? I thought BMW always puts RFTs on the 328i. If the Michelins are go-flats, then this might explain the smoother ride.

Would love to get this same road feel on E90 -- what do you guys think?
Have these on the 335D. They are great tires and do give a little softer ride (they are also great in the rain) but my guess is that it is the suspension changes to the F30. N4S
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  #15  
Old 03-03-2014, 07:38 AM
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It's way more than the tires. 225/45/18 Pirelli Cinturato's on my wife's 328i Luxury Line.

It's a bigger car, not to mention EPS and the 8sp AT make for a different driving experience.
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  #16  
Old 03-03-2014, 03:48 PM
shadow 2 shadow 2 is online now
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Originally Posted by MB330 View Post
I drove few times my daughter 320i and must admit that this is fun to drive car with enough power (185hp) .
Not for me. Way underpowered unless you like slow acceleration.
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  #17  
Old 03-03-2014, 04:32 PM
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floydarogers floydarogers is offline
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Originally Posted by laser View Post
It's way more than the tires. 225/45/18 Pirelli Cinturato's on my wife's 328i Luxury Line.
Yes, but I never said it was just tires.
BTW, on an E9x (actually the fronts on my 335d with sport package) the corresponding size would be 225/40R18.
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  #18  
Old 03-03-2014, 06:02 PM
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  #19  
Old 03-04-2014, 04:28 PM
Dubfound Dubfound is offline
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I actually just put these tires on my 2011 335. They are listed as ZP Zero Pressure. Same as run flats. I ordered them of tire rack and it was like $600 shipped with a $70 rebate in size 17". So fare they are great! They have a beefy sidewall and lip/wheel protector. Hang outside the wheel a good amount. Good in the snow and much smoother then the contis my car came with. The contis had about 30k miles on them.

Last edited by Dubfound; 03-04-2014 at 04:36 PM.
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  #20  
Old 03-04-2014, 05:32 PM
roadkillrob roadkillrob is online now
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I switched from Bridgestones to Michelins on my E93 and the difference was night and day, much improved ride - not as good as non runflats, but much better than the bridestones. It may not be all tire on the F30 that makes the difference, but a good set of runflats mill much improve it.
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  #21  
Old 03-05-2014, 05:52 PM
Drewsome Drewsome is offline
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Quote:
Originally Posted by thekurgan View Post
How many miles are on your E90 tires vs the F30?
E90 has 21,000 miles. F30 has about 2400 miles. So that's yet another variable. Good point.
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  #22  
Old 03-05-2014, 06:31 PM
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thekurgan thekurgan is offline
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Originally Posted by Drewsome View Post
E90 has 21,000 miles. F30 has about 2400 miles. So that's yet another variable. Good point.
It's possible. I had noticed that as the run flats wear, they become noisy.
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Old 03-05-2014, 07:06 PM
Drewsome Drewsome is offline
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Originally Posted by thekurgan View Post
It's possible. I had noticed that as the run flats wear, they become noisy.
It's not the noise; it's feeling every road joint up my spine. It's driving with my eyes peeled for the smallest of potholes, so I can weave around them.

Yeah, I get the whole connected-to-the-road, sports-car driving dynamic. That's why I bought this car, but the jarring ride is getting tedious. I'm ready to look for something I can do to make the ride more compliant while retaining crisp, responsive handling.

I'm leaning towards moving to non-RFTs as a start.
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  #24  
Old 03-05-2014, 08:07 PM
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captainaudio captainaudio is offline
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Quote:
Originally Posted by Drewsome View Post
It's not the noise; it's feeling every road joint up my spine. It's driving with my eyes peeled for the smallest of potholes, so I can weave around them.

Yeah, I get the whole connected-to-the-road, sports-car driving dynamic. That's why I bought this car, but the jarring ride is getting tedious. I'm ready to look for something I can do to make the ride more compliant while retaining crisp, responsive handling.

I'm leaning towards moving to non-RFTs as a start.

This is been discussed at length on this forum:

http://www.bimmerfest.com/forums/sho...ole+explosions

http://www.bimmerfest.com/forums/sho...e+captain+back

I live in Manhattan and I was able to solve the problem by:

1. Ditching the Run Flats - I am running Continental DWS non-RFTs
2, Replacing the dampers with Koni FSDs.

Doing those two things transformed the car (a 2007 335i E93 with Sport Suspension).

CA
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Last edited by captainaudio; 03-05-2014 at 08:08 PM.
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  #25  
Old 03-06-2014, 05:58 AM
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thekurgan thekurgan is offline
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Quote:
Originally Posted by Drewsome View Post
It's not the noise; it's feeling every road joint up my spine. It's driving with my eyes peeled for the smallest of potholes, so I can weave around them.

Yeah, I get the whole connected-to-the-road, sports-car driving dynamic. That's why I bought this car, but the jarring ride is getting tedious. I'm ready to look for something I can do to make the ride more compliant while retaining crisp, responsive handling.

I'm leaning towards moving to non-RFTs as a start.
Agree. No matter what people say, no matter what generation, run flat tires will never be as comfortable as a go flat; it's the price paid for convenience of not getting dirty.
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