08-28-2020, 07:47 PM | #1 |
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Bimmerworld delrin rear subframe bushings - wow
Hi all-
I have seen many post of F30 rear subframe bushing upgrades. I just got the bimmerworld delrin and aluminum version installed while i was getting a wavetrac put in. And..... wow. This is hands down the best thing ive done to the car. The vagueness is gone and the car holds the road with such a confidence inspiring feel. Yes, you need to drop the subframe. Yes, its a total bitch. Yes, its so worth it. Taking it a little easy on the wavetrac for a few miles and then ill have thoughts on that. |
08-28-2020, 08:05 PM | #2 |
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Have you noticed any downsides, i.e. less roll in the rear of the body = understeer ?
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Current : F31 330sD, remapped, Ohlins Road & Track, Millway camber plates, Quaife LSD, Stoptech brakes + Pagid RSL1 pads all round, Weichers front strut brace, Eibach front & rear anti-roll bars, Michelin MP4S.
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08-28-2020, 08:14 PM | #3 | |
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What many folks dont realize is that as the subframe squishes and flexes all around it changes your alignment configuration. I couldnt be more pleased |
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08-28-2020, 08:44 PM | #4 |
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Similar results here. I think there is a little more noise transmitted from the drivetrain/wheels but it's worth it.
It also accents the weaknesses of the differential bushings IMO. Once I get my vibration figured out, I am considering a diff lockdown kit or the diff bushing inserts. Edit: I still get a bit of axle hop when I try to leave hard from a dead stop - which is what I mean about the diff bushings.
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Power mods: VRSF IC/Catted DP - FTP CP/BP - AFE Cat-back - BM3/XHP - Dorch S2
Handling mods: Koni yellow - Eibach prokit - Millway street - M Performance LSD - M3 brakes - EBC bluestuff Exterior: Euro LCI tail lights - Shitty ECS CF spoiler - Chinese M performance diffuser Interior: Bavsound stage 1 and subs - custom trunk sub by Mike1327 Last edited by Eschmacher; 08-28-2020 at 08:54 PM.. |
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08-29-2020, 01:41 PM | #6 |
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Theyre delrin on the outside and aluminum inside. About 300 for the bushings and i paid 5 hours labor to drop the rear subframe to install., so its 800-1000 to do. I can say that for me, its easily worth that much - no question.
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08-29-2020, 05:23 PM | #7 |
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How do you know that the uncertainty from the rear end wasn't fixed by the LSD?
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F30 335iX | Remus Axleback | Fabspeed Catted DP | VRSF Comp IC | 18X9 ET35 19lb MT1 | 255/40/18 ECS | Ohlins RT Millway Street | Millway Control Arm Bushings | Turner Endlinks | TMH 75mm 14x1.5 Studs | BMW MPerf LSD | XDelete | Pipercross Filter | MHD Stg2 93
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08-29-2020, 06:42 PM | #8 | |
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What i do know is that i am thrilled with the car now and my "wolf in sheep's clothing" is basically complete now. |
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08-30-2020, 12:07 AM | #9 | |
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Since the subframe has to be dropped and I have 120k miles on the car, I'll probably replace the rear differential bushings at the same time. |
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08-30-2020, 09:12 AM | #10 | ||
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F30 335iX | Remus Axleback | Fabspeed Catted DP | VRSF Comp IC | 18X9 ET35 19lb MT1 | 255/40/18 ECS | Ohlins RT Millway Street | Millway Control Arm Bushings | Turner Endlinks | TMH 75mm 14x1.5 Studs | BMW MPerf LSD | XDelete | Pipercross Filter | MHD Stg2 93
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02-10-2021, 07:15 PM | #11 | |
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I was browsing Millway's site and came upon these installation instructions for this: https://www.millway.se/pub/media/wys...19-web-eng.pdf |
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02-13-2021, 11:46 AM | #12 | |
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The only issue with delrin is that it doesn't have the elasticity that poly has, so if they deform/crack in any way, they can lose their original shape and allow movement...this is a rare but possible occurence. I have delrin in my subframe and so far so good. Car feels planted and I can power out of corners earlier. If you care about that, then this mod is very much worth doing. Note, that this is not a job for the faint of heart. |
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02-13-2021, 01:34 PM | #13 |
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thinking of picking up the whiteline poly subframe bushings, only $160, same part number as what i used in my e82. i also only dropped mine like 6" and heated up the bushings and used the weight of the car and a 24 or 26mm socket to push out the old bushings. lubed up the whiteline 2 piece and slid them in. and i agree one of the best mods i did on my e82.
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