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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > subframe bushings: powerflex yellow vs purple?



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      11-07-2014, 05:06 PM   #23
ashmostro
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Very pricey
http://www.turnermotorsport.com/p-12...r-e82-e9x.aspx
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      11-07-2014, 05:28 PM   #24
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damnit...making me want to get delrins now...I have solid aluminum diff mounts and that is the only upgrade that increased nvh and even that wasnt that bad. Basically it only increases the whine noise from the diff, but I actually like it...sounds like a plane lol.
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      11-07-2014, 05:34 PM   #25
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Originally Posted by cleex024 View Post
damnit...making me want to get delrins now...I have solid aluminum diff mounts and that is the only upgrade that increased nvh and even that wasnt that bad. Basically it only increases the whine noise from the diff, but I actually like it...sounds like a plane lol.
I have solid and no NVH
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      11-07-2014, 05:35 PM   #26
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those look add weak add OEM? I know there not though lol!
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      11-07-2014, 05:39 PM   #27
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Originally Posted by ashmostro
That's the route I'd go if I were to do it again. M3 SF bushings still allow for too much axle carrier movement. I'd want to hear from someone who's actually pressed them in though as my tech couldn't press the group n bushings in my oem toe arms.
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      11-07-2014, 05:52 PM   #28
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Some are concerned with Delrin rubber cracking? Think Delrin will last?
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      11-07-2014, 06:05 PM   #29
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Originally Posted by robc1976
Some are concerned with Delrin rubber cracking? Think Delrin will last?
I have heard of similar designs cracking/breaking when used for the tranny and motor. I'm not sure how they would be for the subframe? I would guess they would yield similar results.

I would like to hear from someone with the black or purple powerflex subframe bushings.

I really feel the yellows are too soft. They maybe a slight improvement over stock but not much. I wish I would have started with purple, like I did with the tranny bushings. I think the blacks are the way to go...
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      11-07-2014, 06:10 PM   #30
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Originally Posted by robc1976 View Post
Some are concerned with Delrin rubber cracking? Think Delrin will last?
Should last longer than OE bushings. The aluminum sleeve takes up the compression from the bolt so they should be well within their stress limits.
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      11-07-2014, 06:14 PM   #31
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Originally Posted by robc1976 View Post
Neither, I have been a big advocate of the yellow..have reccomended them many times, I recently got a bit of weight transfer back and forth (wobble) and looked and my powerflex yellow are mushroomed and appear to be cracked. I will know more once removed.
um....wat?!?!? Lol...

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      11-07-2014, 10:14 PM   #32
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um....wat?!?!? Lol...
I was very surprised lol!
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      11-07-2014, 10:15 PM   #33
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Originally Posted by justpete View Post
Should last longer than OE bushings. The aluminum sleeve takes up the compression from the bolt so they should be well within their stress limits.
pretty sure I am going that route.
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      11-08-2014, 12:19 AM   #34
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Good thread on M3post on this topic Rob: http://www.m3post.com/forums/showthread.php?t=925690
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      11-08-2014, 12:22 PM   #35
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Good thread on M3post on this topic Rob: http://www.m3post.com/forums/showthread.php?t=925690
Seems they prefer the solid option and Delrin in the differential. I have solid differential bushings via the lockdown kit. I can't believe it takes 12 hours for that job on a M3.
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      11-08-2014, 03:25 PM   #36
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That's just M-tax.
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      11-08-2014, 03:50 PM   #37
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That's just M-tax.
Roflmao!
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      11-08-2014, 03:51 PM   #38
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Ordering Delrin bushing now
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      11-08-2014, 03:55 PM   #39
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Woohoo! Excited for you man.
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      11-08-2014, 04:33 PM   #40
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Woohoo! Excited for you man.
thanks! Will pair good with the single turbo.
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      11-08-2014, 09:15 PM   #41
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Originally Posted by robc1976 View Post
thanks! Will pair good with the single turbo.
lol nice! if you havent already got the ptf/motiv billet solid mounts, akg makes some 75d delrin motor mounts....idk if youd be interested.

http://www.akgmotorsport.com/catalog...Trans%20Mounts
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      11-08-2014, 10:08 PM   #42
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Originally Posted by Stucks View Post
lol nice! if you havent already got the ptf/motiv billet solid mounts, akg makes some 75d delrin motor mounts....idk if youd be interested.

http://www.akgmotorsport.com/catalog...Trans%20Mounts
Fair warning though, without an ATI damper this could lead to engine damage over the long term. Better than solid aluminum engine mounts though. BTW, gotta upgrade the trans mounts at the same time, Vorshlag, Rogue Engineering, UUC, whatever.
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      11-08-2014, 10:59 PM   #43
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Originally Posted by justpete View Post
Fair warning though, without an ATI damper this could lead to engine damage over the long term. Better than solid aluminum engine mounts though. BTW, gotta upgrade the trans mounts at the same time, Vorshlag, Rogue Engineering, UUC, whatever.
solid mounts = to much vibration. Already did the tranny a while back
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      11-08-2014, 11:00 PM   #44
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Originally Posted by Stucks View Post
lol nice! if you havent already got the ptf/motiv billet solid mounts, akg makes some 75d delrin motor mounts....idk if youd be interested.

http://www.akgmotorsport.com/catalog...Trans%20Mounts
to much vibration.
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