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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Car feels like it's gonna slideout/roll please HELP!!



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      04-12-2009, 08:29 PM   #1
lve2xlr8
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Exclamation Car feels like it's gonna slideout/roll please HELP!!

EDIT ****I think I found the problem****


[u2b]<object width="560" height="340"><param name="movie" value="http://www.youtube.com/v/Or1b6JjrXOE&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/Or1b6JjrXOE&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="560" height="340"></embed></object>[/u2b]


Hey guys what's up? I have been noticing my e92 (w/sport pkg) starting to handle progressively worse, and when I put rims on it the other day it's almost unbearable/scary.

Basically any high speed cornering (ie getting on/off the freeway even at the "recommended speed" has been making me feel like the car is gonna slide out. You can especially notice the looseness/rolling when you slalom. (Almost feels like the rear gets the message to turn noticeably after the front does.)

My mods are as follows:

H&R Sport Springs (Installed for about 4k miles)

VMR 710 19x8.5 Front et 35
19x9.5 Rear et 33
Falken 452's 235/35 Front
265/30 Rear

Catted Downpipes (They need to be realigned because they are touching the body of the car underneath) I was wondering if this could have anything to do with it because the engine might not be able to flex back and forth. The reason I say this is because I feel the car started handling bad as soon as these were put on approx 800 miles ago.

I also had an alignment done last week hoping to rid the problem, but it's still there and all alignment figures are in spec and the car drives straight.

Please help before I roll off the road!!

Thanks

Last edited by lve2xlr8; 04-13-2009 at 04:01 PM. Reason: Video Added
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      04-12-2009, 08:50 PM   #2
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I wonder if your H&R Sport springs have now blown out your shocks/struts. You might want to check them to see if they are still damping like they should.
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      04-12-2009, 08:57 PM   #3
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Quote:
Originally Posted by scollins View Post
I wonder if your H&R Sport springs have now blown out your shocks/struts. You might want to check them to see if they are still damping like they should.
I was wondering this too? Is there anyway to check them aside from removing them from the car?
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      04-12-2009, 09:49 PM   #4
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what are your tire pressures?
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      04-12-2009, 10:00 PM   #5
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Quote:
Originally Posted by scollins View Post
I wonder if your H&R Sport springs have now blown out your shocks/struts. You might want to check them to see if they are still damping like they should.
+1 ........ wouldn't surprise me. I know of no other way to check them than removing and physically inspecting for resistance.
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      04-12-2009, 10:04 PM   #6
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I don't think the springs would ruin the stock shocks after only 4k miles. that sounds way too soon. but it doesn't hurt to check anyway..

make sure your tires are properly inflated too
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      04-12-2009, 10:14 PM   #7
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I'd also check your alignment...
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      04-12-2009, 10:40 PM   #8
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depending on how much stiffer the springs are, it could definitely have blown the dampers in 4k miles.

OP has already checked the alignment so its not that.

i'd start by checking the tire pressure. a good way to test the dampers is to drive over a speed bump at like 10mph. have someone outside the car take a look and see how many times the car goes up and down after going over the bump. if the dampers are completely blown the car will bounce up and down a bit after going over the bump. if they are working properly the car will compress, rebound and settle very quickly.

other things to check for are installation error (loose bolts etc) swap out the downpipe to the old part,
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      04-13-2009, 02:17 AM   #9
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Wink

You want to get some sway bars and proper m3 small suspension components upgraded like the bushing and control arm wishbone etc. you can also invest into some coilovers since springs just increase pressure on your stock shock and basically all you achieve is a lowered look and stiff ride rather than significant road handling upgrade.
search the forums for m3 suspension upgrade for e92/e90, check out some upgraded sway bars this would get rid of that annoying body roll. Oh, LSD for the extra control power out of each bend, a M3 component which is a must for real enthusiats (I know Hartge makes one for e92 335i)
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      04-13-2009, 08:49 AM   #10
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Quote:
Originally Posted by lve2xlr8 View Post
Hey guys what's up? I have been noticing my e92 (w/sport pkg) starting to handle progressively worse, and when I put rims on it the other day it's almost unbearable/scary.

Basically any high speed cornering (ie getting on/off the freeway even at the "recommended speed" has been making me feel like the car is gonna slide out. You can especially notice the looseness/rolling when you slalom. (Almost feels like the rear gets the message to turn noticeably after the front does.)

Thanks

I noticed the exact same thing when I changed my stock rear tyres (Bridgestone Potenza RE050 RFT 255/45R17) to the Falkenīs 452 255/45R17.

I think the problem is in the soft sidewalls of the falkenīs.
The body-roll becomes very noticeable and it seems like the front and the rear turns in at different times.

If you drive throw the corners fast but smoothly it gets a little scary because the rear end takes an eternity to settle down and when it finaly does the excessive body-roll at that point seems like an oversteer situation.

When you drive harder this effect is less noticeable. I think this happens because the shock-absorvers are more efficient to control this tyre+body roll in high-speed movements.
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      04-13-2009, 12:47 PM   #11
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its probably your catted downpipes

but in all seriousness its probably tires, springs, or alignment (or a combination)
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      04-13-2009, 01:55 PM   #12
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Quote:
Originally Posted by MDiesel View Post
I noticed the exact same thing when I changed my stock rear tyres (Bridgestone Potenza RE050 RFT 255/45R17) to the Falkenīs 452 255/45R17.

I think the problem is in the soft sidewalls of the falkenīs.
The body-roll becomes very noticeable and it seems like the front and the rear turns in at different times.

If you drive throw the corners fast but smoothly it gets a little scary because the rear end takes an eternity to settle down and when it finaly does the excessive body-roll at that point seems like an oversteer situation.

When you drive harder this effect is less noticeable. I think this happens because the shock-absorvers are more efficient to control this tyre+body roll in high-speed movements.
Hmm yea I guess that could be it, but it seems more sever than that.. I'll throw my stock wheels/tires back on and see if it handles differently...

Thanks for the help guys
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      04-13-2009, 03:06 PM   #13
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So I think I need a new front passenger side strut, what do you think?

[u2b]<object width="560" height="340"><param name="movie" value="http://www.youtube.com/v/Or1b6JjrXOE&hl=en&fs=1"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/Or1b6JjrXOE&hl=en&fs=1" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="560" height="340"></embed></object>[/u2b]

Does anyone have any stock struts I can pick up? Or any recommendations on aftermarket?

Which (e90/e92 328/335 spt pkg/non spt pkg) use the same struts?

Thanks!
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      05-06-2009, 05:11 PM   #14
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Quote:
Originally Posted by lve2xlr8 View Post
EDIT ****I think I found the problem****


Hey guys what's up? I have been noticing my e92 (w/sport pkg) starting to handle progressively worse, and when I put rims on it the other day it's almost unbearable/scary.
Did you ever sort out your suspension problem?
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