Ad: VTT - New Product Release - Billet Motor Mount Inserts

Oct 24, 2016
1,111
Scottsdale, AZ
Hey Chris, what do I buy for the N55 m2? The driver side and passenger side motor mounts are different with only one mount being shared with the s55 and the other being an unshared part number with any bmw.

Well, the S55 series will fit at least the one mount. We're not sure about the other side since it isn't cross-referenced to anything and we haven't checked that one specifically.

Chris
 
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fmorelli

Major General
Staff member
Aug 11, 2017
3,023
Virginia
Just curious why you'd run driver side only? I took measurements on stock motor mounts on my car around 30k miles (most of those at stock HP) and the passenger side mount was collapsed - total junk. The driver side motor mount looked pretty good. The problem child is on the compression side of the motor. And if you are running the $10,000,000 iS mount then I'd be concerned about not having to spend $10,000,000 each time that mount takes a crap. In the N54 case, whether you know it or not (i.e. take your factory mounts out and measure them), the passenger-side mount is getting destroyed. I suspect it is a fatigue failure caused by rate of change and/or extent of compression and extension. Seems like these would limit those factors.

I'm guessing the inserts may limit compression and expansion material abuse and prolong the life of the motor mounts. If you are running stock Corteco mounts, they are cheap and who cares (that is, buy them primarily for performance reasons). But if you are running the cubic zirconia iS mounts, getting longevity out of your depreciating asset might be a bigger reason for considering this setup. Just a thought.

I'm on Rev 1 of the Revshift 80a - love them with RE rubber trans mounts, but I'm on a manual transmission. If and when those fail, I'll buy the VTT inserts and some Corteco mounts, most likely, and call it a day.

Filippo
 
Last edited:
L

Lurker-773329

Guest
Just curious why you'd run driver side only? I took measurements on stock motor mounts on my car around 30k miles (most of those at stock HP) and the passenger side mount was collapsed - total junk. The driver side motor mount looked pretty good. The problem child is on the compression side of the motor. And if you are running the $10,000,000 iS mount then I'd be concerned about not having to spend $10,000,000 each time that mount takes a crap. In the N54 case, whether you know it or not (i.e. take your factory mounts out and measure them), the passenger-side mount is getting destroyed. I suspect it is a fatigue failure caused by rate of change and/or extent of compression and extension. Seems like these would limit those factors.

I'm guessing the inserts may limit compression and expansion material abuse and prolong the life of the motor mounts. If you are running stock Corteco mounts, they are cheap and who cares (that is, buy them primarily for performance reasons). But if you are running the cubic zirconia iS mounts, getting longevity out of your depreciating asset might be a bigger reason for considering this setup. Just a thought.

I'm on Rev 1 of the Revshift 80a - love them with RE rubber trans mounts, but I'm on a manual transmission. If and when those fail, I'll buy the VTT inserts and some Corteco mounts, most likely, and call it a day.

Filippo
8
 

derekgates

Sergeant
Feb 23, 2018
422
NW FL
Just curious why you'd run driver side only? I took measurements on stock motor mounts on my car around 30k miles (most of those at stock HP) and the passenger side mount was collapsed - total junk. The driver side motor mount looked pretty good. The problem child is on the compression side of the motor. And if you are running the $10,000,000 iS mount then I'd be concerned about not having to spend $10,000,000 each time that mount takes a crap. In the N54 case, whether you know it or not (i.e. take your factory mounts out and measure them), the passenger-side mount is getting destroyed. I suspect it is a fatigue failure caused by rate of change and/or extent of compression and extension. Seems like these would limit those factors.

I'm guessing the inserts may limit compression and expansion material abuse and prolong the life of the motor mounts. If you are running stock Corteco mounts, they are cheap and who cares (that is, buy them primarily for performance reasons). But if you are running the cubic zirconia iS mounts, getting longevity out of your depreciating asset might be a bigger reason for considering this setup. Just a thought.

I'm on Rev 1 of the Revshift 80a - love them with RE rubber trans mounts, but I'm on a manual transmission. If and when those fail, I'll buy the VTT inserts and some Corteco mounts, most likely, and call it a day.

Filippo
blahahahahaha... Cubic Zirconia iS mounts. :D

Well, I've been trying to get some information on this earlier in the thread. I thought I had mentioned that I think the passenger is worse off due to the amount of weight it is holding, but "ruining" the comfort of the extremely expensive 'iS mount would not be ideal (since it seems like the insert is a permanent alteration?).

I am not made of money and don't want to bring back the horrible NVH I've experienced by "ruining" an 'iS mount.

[EDIT] Not trying to say that these inserts ruin any mounts... just trying to prevent making the stock feel of 'iS mount feel anywhere like the poly mounts... :)
 
I am not made of money and don't want to bring back the horrible NVH I've experienced by "ruining" an 'iS mount.

Nor do I want to waste my time ($) having to do this again relatively quickly. I'm sure someone who is paying for this work will eventually read this thread and want some opinions on what the perceived best solution is vs doing this 2-3 times to get it right (whatever that "right" is to that person).

As I gain power, if I'm F'ing up a mount every 5-6k miles, I'm looking for a better solution than stock from the get-go. It's not like bleeding your brakes, I don't want to have to do this again for a while..
 

derekgates

Sergeant
Feb 23, 2018
422
NW FL
Just wanted to update that Im still running these and still very happy with them. I tried lowering the idle rpm but that is a no go.

Did anyone ever try the IS-mounts in combination with these?
Kick ass!

I am about to install these with the IS-mounts and the OEM mount... Have had the car in pieces since December for rear end work... front end work is next! Will post updates when I can.
 
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Jeffman

Captain
Jan 7, 2017
1,421
I’m still on my original 12 yo stock N54 motor mounts 70K miles 335xi. I suspect it’s time to change them and am looking forward to hearing how the various combinations will result for you guys.
 

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