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      03-07-2014, 04:08 PM   #45
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Quote:
Originally Posted by Malek@MRF View Post
Some cars whine more/less than others depending on the diff oil that is being used (FM vs. non FM fluid).
That's interesting. Which tends to produce more "whine" and is there any disadvantage to running the "quieter" oil in the diff?
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      03-07-2014, 06:57 PM   #46
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Quote:
Originally Posted by Malek@MRF View Post
The diff whine wouldn't be louder than that setup. Some cars whine more/less than others depending on the diff oil that is being used (FM vs. non FM fluid).
Thanks Malek you'll always been a great help, i'll be in touch with the Sub Frame bushing soon. Any update on the engine and tranny mounts that you were looking into?

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Originally Posted by Hujan View Post
That's interesting. Which tends to produce more "whine" and is there any disadvantage to running the "quieter" oil in the diff?
I believe BMW switch all the cars to FM booster fluid, that's what i use to change my diff fluid a while back.
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      03-08-2014, 01:25 PM   #47
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Originally Posted by Ant Man View Post
Jack, glad you like the mods. Malek quoted me $195 to send via Fedex which I thought was a lot from a cost / weight perspective. I would have thought they could be sent for less? Perhaps a cheaper courier is available. Did you get charged VAT / custom charges on top?

Also, did you use Birds? And how long did the job take pls?
To be honest I thought it was far too much for a fairly small, light package but I don't have the time to research a cheaper courier. I was charged about £50 by Fedex on top of this.

I did use Birds and it was very expensive but they do a good job and I use them for all my work.
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      03-08-2014, 01:39 PM   #48
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Been driving the car some more today and yes, I really love it. I can't wait to take it on track.

One thing I have noticed is that as well as the diff whine you do also hear a clunk during each gearchange now (6MT). I assume this is due to the solid diff bushings and it doesn't bother me, but nobody seems to have mentioned it before.

Malek - is this gearchange clunk to be expected?

Last edited by FazerBoy; 03-09-2014 at 11:32 AM..
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      03-08-2014, 01:52 PM   #49
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Quote:
Originally Posted by tmntmn View Post

I believe BMW switch all the cars to FM booster fluid, that's what i use to change my diff fluid a while back.
If so, the question remains whether that makes the diff bushings quieter or not.
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      03-09-2014, 04:11 PM   #50
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Hi Malek, I'm interested on a set of aluminum Solid Sub-Frame bushings and Delrin differential bushings. I don’t seem to find them on your website. Can you please let me know the price shipped to 32828?

Thanks
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      03-12-2014, 03:50 PM   #51
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Quote:
Originally Posted by FazerBoy View Post
Been driving the car some more today and yes, I really love it. I can't wait to take it on track.

One thing I have noticed is that as well as the diff whine you do also hear a clunk during each gearchange now (6MT). I assume this is due to the solid diff bushings and it doesn't bother me, but nobody seems to have mentioned it before.

Malek - is this gearchange clunk to be expected?
Hi,

Can anyone with the subframe and diff bushings please chip in and tell me whether you are also getting clunking noises? I don't mind them too much but I just want to know if this is to be expected or whether I need to get my installer to look at my car. Malek??

Jack
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      03-12-2014, 07:06 PM   #52
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Quote:
Originally Posted by FazerBoy View Post
Hi,

Can anyone with the subframe and diff bushings please chip in and tell me whether you are also getting clunking noises? I don't mind them too much but I just want to know if this is to be expected or whether I need to get my installer to look at my car. Malek??

Jack
Jack,

I have a 6MT. I am hesitant to go into detail because I do not want to dissuade anyone from getting this modification because to me these extra noises are very minor.

I too get a little extra linkage noise with the diff mounts. Usually at slow speed. I have also noticed some extra clutch and diff gear lash when moving slow and when going slow over bumps. At speed I do not notice any extra noise. For me I believe the sounds are even more noticeable with my SSK which uses delrin bushings.

For example, when backing out of my garage I get a little extra noise when I release the clutch and noise again when I shift from reverse to 1st gear. Once moving at speed (say over 20mph) I don't hear these noises anymore. However, I have a relatively loud exhaust that is probably drowning them out or when load is on the drivetrain the noises no longer occur.

Jason
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      03-12-2014, 07:21 PM   #53
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Quote:
Originally Posted by JEllis View Post
Jack,

I have a 6MT. I am hesitant to go into detail because I do not want to dissuade anyone from getting this modification because to me these extra noises are very minor.

I too get a little extra linkage noise with the diff mounts. Usually at slow speed. I have also noticed some extra clutch and diff gear lash when moving slow and when going slow over bumps. At speed I do not notice any extra noise. For me I believe the sounds are even more noticeable with my SSK which uses delrin bushings.

For example, when backing out of my garage I get a little extra noise when I release the clutch and noise again when I shift from reverse to 1st gear. Once moving at speed (say over 20mph) I don't hear these noises anymore. However, I have a relatively loud exhaust that is probably drowning them out or when load is on the drivetrain the noises no longer occur.

Jason
Jason,

Thanks for that - that's put my mind at rest. I'm getting exactly those noises and all I wanted to know is that this is normal. The noises do not bother me in themselves.

As I said before, I love this mod and think that the M3 should have come like this as standard, but I also feel that we have to be honest about reporting what the downsides are if this is to be a community of people who help each other out with information.

I would be unhappy if I went ahead and carried out an expensive modification to my car based on reviews that only highlighted the positive aspects but neglected to mention any downsides.

Jack
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      03-12-2014, 07:49 PM   #54
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Quote:
Originally Posted by FazerBoy View Post
Jason,

Thanks for that - that's put my mind at rest. I'm getting exactly those noises and all I wanted to know is that this is normal. The noises do not bother me in themselves.

As I said before, I love this mod and think that the M3 should have come like this as standard, but I also feel that we have to be honest about reporting what the downsides are if this is to be a community of people who help each other out with information.

I would be unhappy if I went ahead and carried out an expensive modification to my car based on reviews that only highlighted the positive aspects but neglected to mention any downsides.

Jack
Agreed.... and us 6MT guys need to stick together. Hardly anyone has one anymore!
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      03-12-2014, 11:11 PM   #55
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Good discussion, guys. Just to clarify, the noises you're hearing are from the diff bushings not the subframe bushings, correct?

It sounds like there is really no downside to the subframe bushings, but some minor trade-offs with the diff bushings. I'm curious how the noises compare on the DCT vs. the 6MT and which one is quieter.

I would love for someone to grab an audio clip of the "diff whine." It sounds like it might actually sound cool, almost like turbo spool or supercharger whine. But that's just an assumption on my part.
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      03-13-2014, 03:25 PM   #56
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Quote:
Originally Posted by FazerBoy View Post
Hi,

Can anyone with the subframe and diff bushings please chip in and tell me whether you are also getting clunking noises? I don't mind them too much but I just want to know if this is to be expected or whether I need to get my installer to look at my car. Malek??

Jack
The drivetrain noises are normal. They are simply being amplified because of the harder bushings. The factory car actually has an inherently loud drivetrain.


Quote:
Originally Posted by FazerBoy View Post
Jason,

Thanks for that - that's put my mind at rest. I'm getting exactly those noises and all I wanted to know is that this is normal. The noises do not bother me in themselves.

As I said before, I love this mod and think that the M3 should have come like this as standard, but I also feel that we have to be honest about reporting what the downsides are if this is to be a community of people who help each other out with information.

I would be unhappy if I went ahead and carried out an expensive modification to my car based on reviews that only highlighted the positive aspects but neglected to mention any downsides.

Jack
Quote:
Originally Posted by Hujan View Post
Good discussion, guys. Just to clarify, the noises you're hearing are from the diff bushings not the subframe bushings, correct?

It sounds like there is really no downside to the subframe bushings, but some minor trade-offs with the diff bushings. I'm curious how the noises compare on the DCT vs. the 6MT and which one is quieter.

I would love for someone to grab an audio clip of the "diff whine." It sounds like it might actually sound cool, almost like turbo spool or supercharger whine. But that's just an assumption on my part.
You are correct. The noises being heard are from the differnetial bushings and not a cause of the solid subframe bushing set. The subframe bushings are not technically attached or affixed to any component that carries a mechanical moving assembly like the differential, it is bolted to the unibody.

There is nothing lost with subframe bushings that are solid, only massive gains. Differential bushings that are solidified offer great gains in chassis response and being able to "read" what the rear end is doing a little better while also helping eliminate wheel hop coupled with the subframe bushings, but they do create a little bit of a whine.

The whine I find to be addicting and genuinely love it. A performance car will and should make noise.

Over the years, it's the consumer who at the end dictated for M vehicles to become softer, quieter and cushier. If these concerns didn't exist to BMW, I am almost certain the vehicles would come this way from the factory.
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      03-16-2014, 12:56 AM   #57
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Can somebody post an audio file of the whine sound with derline differential bushings with a stock exhaust????

I'm about to pull the trigger on the combo but I'm concern of the pitch and volume of the whine.
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      03-19-2014, 11:53 AM   #58
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Bump for audio upload.
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      03-25-2014, 11:01 PM   #59
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Anyone???
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      03-30-2014, 12:23 PM   #60
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Here is the Diff whine noise from my car. These are Delrin Turner mounts.

First part of the video you hear is cruising 75-80 mph in 6th gear. Noise is faint since it has to compete with wind noise, road noise, and engine/exhaust. Car has a OEM mod (Perf Method) and Dinan Intake.

Second Part you hear is lifting, and decelerating in 6th gear, so the whine is only competing with wind noise and road noise.This is probably when the sound is at it's highest.

Last is rolling on the gas in 6th gear.

No NVH from the Solid Aluminum rear Subframe Bushings. All the noise is from the mounts. It's not bad, but it's definitely there. If you are truly sensitive to noises, or this car is your DD and you take non car people around you may want to really re consider.

My car is mostly track duty with once a week I drive it to work to keep the battery charged and to hook it up to the BMW charger in the service dept.

Iphone video. Sorry GF doesn't know the portrait rule on video. The sound is pointed right at the back of the car so observed noise from the front is slightly different since there is induction noise from the engine.




http://youtu.be/kyg31xy-JkE
Direct Link if the embed doesn't work.
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      04-03-2014, 08:02 PM   #61
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Ordered a set of the MRF solid aluminum subframe bushings and TMS Delrin diff bushings. More to follow after the install on the 15th.
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      04-04-2014, 01:04 AM   #62
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Quote:
Originally Posted by TrakBch View Post
Here is the Diff whine noise from my car. These are Delrin Turner mounts.

First part of the video you hear is cruising 75-80 mph in 6th gear. Noise is faint since it has to compete with wind noise, road noise, and engine/exhaust. Car has a OEM mod (Perf Method) and Dinan Intake.

Second Part you hear is lifting, and decelerating in 6th gear, so the whine is only competing with wind noise and road noise.This is probably when the sound is at it's highest.

Last is rolling on the gas in 6th gear.

No NVH from the Solid Aluminum rear Subframe Bushings. All the noise is from the mounts. It's not bad, but it's definitely there. If you are truly sensitive to noises, or this car is your DD and you take non car people around you may want to really re consider.

My car is mostly track duty with once a week I drive it to work to keep the battery charged and to hook it up to the BMW charger in the service dept.

Iphone video. Sorry GF doesn't know the portrait rule on video. The sound is pointed right at the back of the car so observed noise from the front is slightly different since there is induction noise from the engine.




http://youtu.be/kyg31xy-JkE
Direct Link if the embed doesn't work.
Thanks for the vid. It's louder than I was expecting, but the tone is not bad. Would like to hear it first hand.
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      04-04-2014, 11:47 AM   #63
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Quote:
Originally Posted by Hujan View Post
Thanks for the vid. It's louder than I was expecting, but the tone is not bad. Would like to hear it first hand.
Ben,

I figured you would've liked the sound seeing as how it sounds exactly like that supercharged mini at chuckwalla last weekend

Personally, I love the sound and can't wait to head up to MRF in the near future to get these installed!
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      04-05-2014, 12:06 AM   #64
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Quote:
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Ben,

I figured you would've liked the sound seeing as how it sounds exactly like that supercharged mini at chuckwalla last weekend

Personally, I love the sound and can't wait to head up to MRF in the near future to get these installed!
True, true. I do love me some supercharger whine!
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      04-05-2014, 03:53 AM   #65
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I really wish I could do this mod but I don't feel comfortable with anyone in my area doing the install.
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      04-14-2014, 09:51 PM   #66
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Going in tomorrow.
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