MRF solid aluminum subframe bushings

OM VT3 · 05-13-2014, 11:58 PM

Quote:

Originally Posted by Longbow64

Finally got the car back. The car feels more planted than ever. I feel like control of the car is up by about 25%. I've only driven about 10 miles on it so far. I'll post additional feedback once I get a little more driving in. The NVH is definitely noticeable and a lot louder than I thought it would be. You don't really notice it with the radio on at a normal level and you can't hear it at all with the windows open. Radio off and windows closed; definitely. As stated in a previous post, if this is your daily driver I'd probably go with just the subframe bushings.

Daily drive got them both

who cares about a little noise......I've got a little noise with out them

Can't wait to get them in and see what it's like

Someone? · 05-14-2014, 10:11 AM

Anyone thought of doing soild subframe/ with Powerflex diff bushings? they are a lot better then stock im sure and come in 70A/80A/95A and seem like it would be a great setup with minimal NVH?

whats77inaname · 05-14-2014, 11:45 AM

Quote:

Originally Posted by ibmike

Anyone thought of doing soild subframe/ with Powerflex diff bushings?

+1. I have a set of the TMS Delrins that I haven't installed yet, and am thinking it would be wiser to go Powerflex w/MRF subframes.

Quote:

Originally Posted by Longbow64

NVH is definitely noticeable and a lot louder than I thought it would be. You don't really notice it with the radio on at a normal level and you can't hear it at all with the windows open. Radio off and windows closed; definitely. As stated in a previous post, if this is your daily driver I'd probably go with just the subframe bushings.

Hmmmmmmmmmm....aren't the diff bushings pretty much foam? That would mandate some sort of upgrade, even poly would be better than that.

You can hear it over the AA catless?

dereksM3 · 05-14-2014, 12:44 PM

I've been wondering the same. Powerflex comes in the softer 80A purple and harder 95A black durometers. Wonder if anybody has tried the black series for the diff?

Malek@MRF · 05-14-2014, 01:33 PM

Quote:

Originally Posted by ibmike

Anyone thought of doing soild subframe/ with Powerflex diff bushings? they are a lot better then stock im sure and come in 70A/80A/95A and seem like it would be a great setup with minimal NVH?

Doing that very same combination right now on a customers vehicle as this is being typed. Mike Benvo's E90 M3. MRF Engineering subframe bushings and Powerflex Differential bushings. He has the softer version of the Powerflex being installed for the differential.

Someone? · 05-14-2014, 03:34 PM

Quote:

Originally Posted by Malek@MRF

Doing that very same combination right now on a customers vehicle as this is being typed. Mike Benvo's E90 M3. MRF Engineering subframe bushings and Powerflex Differential bushings. He has the softer version of the Powerflex being installed for the differential.

Sweet ! if you/or mike could give us a report when done that would be great. Im think this is the combo im going to do(MRF Subs/Powerflex Diff).

So when you say softer ones is that the 70A or 80A ? I'll probably do the 80A's i was thinking. Thanks

lsmkr01 · 05-14-2014, 03:34 PM

Quote:

Originally Posted by Malek@MRF

Doing that very same combination right now on a customers vehicle as this is being typed. Mike Benvo's E90 M3. MRF Engineering subframe bushings and Powerflex Differential bushings. He has the softer version of the Powerflex being installed for the differential.

Looking forward to Mikes review when you get his car done with these softer diff. bushings

Hujan · 05-14-2014, 03:37 PM

+1 for a review of the PowerFlex diff bushings for those of us looking to upgrade with near zero NVH.

Malek@MRF · 05-14-2014, 04:27 PM

Quote:

Originally Posted by Hujan

+1 for a review of the PowerFlex diff bushings for those of us looking to upgrade with near zero NVH.

Let's be clear, there is NO vibration or harshness with solid or delrin differential mounts, only whine. The car does not drive less comfortably as a result, it just makes more sound. If you have an aftermarket exhaust, chances are the whine will be unnoticeable.

Longbow64 · 05-14-2014, 05:08 PM

That is true there is no harshness or vibration; only noise. My noise is slightly louder than the exhaust (AA Signature catless) and at a higher frequency. The car drives amazing. I was just expecting the whine to be less noisy. I'll send you a clip; maybe it's not supposed to be that loud.

dereksM3 · 05-14-2014, 05:45 PM

Quote:

Originally Posted by ibmike

Sweet ! if you/or mike could give us a report when done that would be great. Im think this is the combo im going to do(MRF Subs/Powerflex Diff).

So when you say softer ones is that the 70A or 80A ? I'll probably do the 80A's i was thinking. Thanks

According to Powerflex's website they only offer two variants; Purple 80A and Black 95A? I believe the softer Yellow 70A bushings don't necessarily apply to an M3.

Hujan · 05-14-2014, 09:11 PM

Quote:

Originally Posted by Malek@MRF

Let's be clear, there is NO vibration or harshness with solid or delrin differential mounts, only whine. The car does not drive less comfortably as a result, it just makes more sound. If you have an aftermarket exhaust, chances are the whine will be unnoticeable.

Of course, of course. I didn't mean to imply anything to the contrary. Just meant that if solid or delrin result in some increased N but no V or H, PowerFlex would be great if they offered zero increased N, V, or H.

Someone? · 05-14-2014, 09:53 PM

Yah im looking for no or as little as possible Whine while getting the benefit of a harder bushing. Long said " slightly louder then a catless exhaust" thats a loud frign whine if you can hear it over a catless x pipe! And no way do i want that! i can handle some whine, but nothing like that.

schnell325 · 05-14-2014, 10:53 PM

Quote:

Originally Posted by Longbow64

That is true there is no harshness or vibration; only noise. My noise is slightly louder than the exhaust (AA Signature catless) and at a higher frequency. The car drives amazing. I was just expecting the whine to be less noisy. I'll send you a clip; maybe it's not supposed to be that loud.

Awesome to read your review. I'll be exactly your bushings and exhaust setup

OM VT3 · 05-15-2014, 02:09 AM

Quote:

Originally Posted by Longbow64

That is true there is no harshness or vibration; only noise. My noise is slightly louder than the exhaust (AA Signature catless) and at a higher frequency. The car drives amazing. I was just expecting the whine to be less noisy. I'll send you a clip; maybe it's not supposed to be that loud.

Do you know if you have the diff fluid with FM booster?

Longbow64 · 05-15-2014, 02:20 AM

Only by them telling me I do.

thekurgan · 05-15-2014, 09:25 AM

Quote:

Originally Posted by leigh

Do you know if you have the diff fluid with FM booster?

The FM boosted diff fluid has nothing to do with any whine when the car is moving straight.

Longbow64 · 05-15-2014, 02:06 PM

After checking the turner website it states that for a new differential the whine may be louder during the 1200 mile break-in. Since I did a diff replacement and a bushing upgrade, the level of the noise may not be from the bushings and I'm hoping reduces as it gets broken in. I'll provide another update once the break-in period is complete.

OM VT3 · 05-15-2014, 03:58 PM

Quote:

Originally Posted by Longbow64

After checking the turner website it states that for a new differential the whine may be louder during the 1200 mile break-in. Since I did a diff replacement and a bushing upgrade, the level of the noise may not be from the bushings and I'm hoping reduces as it gets broken in. I'll provide another update once the break-in period is complete.

Once you have don't the break in do they tell you to change the oil again?

squartus · 05-15-2014, 04:18 PM

I have 25k miles on my car and the whine for solid derlin diff mounts can still be heard over my AA signature exhaust with test pipes. Its not super loud per say just a higher pitch than the exhaust, like a high speed turbine almost.

Well worth the feel and safety you get from the upgrade though.

Longbow64 · 05-15-2014, 04:24 PM

Yes, the oil needs to be changed at 1200 miles. I'm not looking to not hear a noise at all. I expect to still hear it. But if it stays as loud as it currently is than I'm not comfortable with that. More to follow.

whats77inaname · 05-15-2014, 04:43 PM

Quote:

Originally Posted by schnell325

Awesome to read your review. I'll be exactly your bushings and exhaust setup

If you want a set of brand new, never used TMS Delrins, hit me up, as I'm going to be headed down the poly route.

05-14-2014, 10:11 AM	#112
Someone? Perception is King 131 Rep 1,703 Posts Drives: M4 Join Date: May 2013 Location: Michigan iTrader: (8)	Anyone thought of doing soild subframe/ with Powerflex diff bushings? they are a lot better then stock im sure and come in 70A/80A/95A and seem like it would be a great setup with minimal NVH? __________________ Perception and Reality are Two totally different Things.
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05-14-2014, 12:44 PM	#114
dereksM3 Captain 270 Rep 888 Posts Drives: 2016 MG 340i M-Sport Join Date: Mar 2009 Location: Lynnwood, WA iTrader: (3)	I've been wondering the same. Powerflex comes in the softer 80A purple and harder 95A black durometers. Wonder if anybody has tried the black series for the diff?
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05-14-2014, 03:37 PM	#118
Hujan Brigadier General 569 Rep 3,742 Posts Drives: M3 Join Date: Apr 2013 Location: . iTrader: (16)	+1 for a review of the PowerFlex diff bushings for those of us looking to upgrade with near zero NVH.
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05-14-2014, 05:08 PM	#120
Longbow64 _______ 169 Rep 1,088 Posts Drives: 15 M3, 13 X3 35i MSport Join Date: Apr 2008 Location: Orlando iTrader: (4)	That is true there is no harshness or vibration; only noise. My noise is slightly louder than the exhaust (AA Signature catless) and at a higher frequency. The car drives amazing. I was just expecting the whine to be less noisy. I'll send you a clip; maybe it's not supposed to be that loud. __________________ '13 35i M-Sport X3 \| JB4 Stage 1 \| BMS Intake \| H&R Springs \| Gloss black grill \| CF Wrap and Coded by me \| Recaro Child Seats '15 M3 DCT AW/SO \| JB Stage 1 \| RKP Diffuser \| P3 \| M Perf Spoiler \| iND Exterior Trim \| Recaro Child Seat
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05-14-2014, 09:53 PM	#123
Someone? Perception is King 131 Rep 1,703 Posts Drives: M4 Join Date: May 2013 Location: Michigan iTrader: (8)	Yah im looking for no or as little as possible Whine while getting the benefit of a harder bushing. Long said " slightly louder then a catless exhaust" thats a loud frign whine if you can hear it over a catless x pipe! And no way do i want that! i can handle some whine, but nothing like that. __________________ Perception and Reality are Two totally different Things. Last edited by Someone?; 05-14-2014 at 10:12 PM..
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05-15-2014, 02:20 AM	#126
Longbow64 _______ 169 Rep 1,088 Posts Drives: 15 M3, 13 X3 35i MSport Join Date: Apr 2008 Location: Orlando iTrader: (4)	Only by them telling me I do. __________________ '13 35i M-Sport X3 \| JB4 Stage 1 \| BMS Intake \| H&R Springs \| Gloss black grill \| CF Wrap and Coded by me \| Recaro Child Seats '15 M3 DCT AW/SO \| JB Stage 1 \| RKP Diffuser \| P3 \| M Perf Spoiler \| iND Exterior Trim \| Recaro Child Seat
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05-15-2014, 02:06 PM	#128
Longbow64 _______ 169 Rep 1,088 Posts Drives: 15 M3, 13 X3 35i MSport Join Date: Apr 2008 Location: Orlando iTrader: (4)	After checking the turner website it states that for a new differential the whine may be louder during the 1200 mile break-in. Since I did a diff replacement and a bushing upgrade, the level of the noise may not be from the bushings and I'm hoping reduces as it gets broken in. I'll provide another update once the break-in period is complete. __________________ '13 35i M-Sport X3 \| JB4 Stage 1 \| BMS Intake \| H&R Springs \| Gloss black grill \| CF Wrap and Coded by me \| Recaro Child Seats '15 M3 DCT AW/SO \| JB Stage 1 \| RKP Diffuser \| P3 \| M Perf Spoiler \| iND Exterior Trim \| Recaro Child Seat
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05-15-2014, 04:18 PM	#130
squartus Major 314 Rep 1,017 Posts Drives: 2010 E92 M3 6MT Join Date: Apr 2013 Location: Mississippi iTrader: (0) Garage List 2010 E92 BMW M3 [10.00]	I have 25k miles on my car and the whine for solid derlin diff mounts can still be heard over my AA signature exhaust with test pipes. Its not super loud per say just a higher pitch than the exhaust, like a high speed turbine almost. Well worth the feel and safety you get from the upgrade though. __________________ 4.4L LC stroker/ESS VT2-625/Volk te37 sl's/AA exhaust/DSS Carbon Fiber driveshaft/ARH Headers.. etc
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05-15-2014, 04:24 PM	#131
Longbow64 _______ 169 Rep 1,088 Posts Drives: 15 M3, 13 X3 35i MSport Join Date: Apr 2008 Location: Orlando iTrader: (4)	Yes, the oil needs to be changed at 1200 miles. I'm not looking to not hear a noise at all. I expect to still hear it. But if it stays as loud as it currently is than I'm not comfortable with that. More to follow. __________________ '13 35i M-Sport X3 \| JB4 Stage 1 \| BMS Intake \| H&R Springs \| Gloss black grill \| CF Wrap and Coded by me \| Recaro Child Seats '15 M3 DCT AW/SO \| JB Stage 1 \| RKP Diffuser \| P3 \| M Perf Spoiler \| iND Exterior Trim \| Recaro Child Seat
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