Any experience with RevShift solid rear subframe mount bushings?

IamFODI · 10-20-2022, 08:45 AM

Want to do solid subframe mount bushings in the next year or so and leaning toward RevShift because FCP Euro sells them. It's not that I expect to have to return them for wear or anything; I just like to stick with FCP Euro on principle where possible.

Reviews on RevShift's other stuff seem to be... mixed. But I haven't seen any on their solid subframe mount bushings, and those seem like a really straightforward part.

Anyone use this part and/or have any thoughts?

DRLane · 10-20-2022, 09:00 AM

Go with solid aluminum, if you're pulling the subframe might as well do it once.

IamFODI · 10-20-2022, 09:10 AM

Quote:

Originally Posted by DRLane

Go with solid aluminum, if you're pulling the subframe might as well do it once.

Yep, they are aluminum.

https://www.fcpeuro.com/products/bmw...vshift-asb-e9x

DRLane · 10-20-2022, 09:52 AM

Quote:

Originally Posted by IamFODI

Quote:

Originally Posted by DRLane

Go with solid aluminum, if you're pulling the subframe might as well do it once.

Yep, they are aluminum.

https://www.fcpeuro.com/products/bmw...vshift-asb-e9x

Sounds like you're squared away! Haven't seen the two piece aluminum before. Good luck and enjoy

IamFODI · 10-20-2022, 10:32 AM

Quote:

Originally Posted by DRLane

Sounds like you're squared away! Haven't seen the two piece aluminum before. Good luck and enjoy

Would you run these in the absence of reviews, and given RevShift's other products have a spotty rep?

DRLane · 10-20-2022, 10:54 AM

Quote:

Originally Posted by IamFODI

Quote:

Originally Posted by DRLane

Sounds like you're squared away! Haven't seen the two piece aluminum before. Good luck and enjoy

Would you run these in the absence of reviews, and given RevShift's other products have a spotty rep?

I'd go with tried and true options from any of the other players. But 🤷🏻*♂️

ganz · 10-24-2022, 12:44 AM

I have these subframe bushings (2-piece aluminum) in my car. No noticeable difference between these and other E9X that I have driven with Turner or MRF bushings. I went with these because of the claims around "sandwiching" the subframe which I have no clue whether makes any difference at all. The important thing is it doesn't make noise.

e92zero · 10-26-2022, 01:32 PM

That look interesting and probably make installation easier. But from the pic, it doesn't look like the part inserted into the subframe are round? Maybe it's designed for easy of installation. Not sure if it has any long term effect?

Redd · 10-26-2022, 06:53 PM

Were these Revshift two-piece units easier to install than the other one-piece ones?

IamFODI · 05-27-2023, 10:51 AM

Coming back to this as I'm planning to order soon.

I just emailed Revshift about e92zero's question and a couple more. We'll see what they say.

For now, I'm kind of leaning toward another option like Bimmerworld. Hard to imagine Revshift knows more about how to build a product for this platform than Bimmerworld does. Let's see if Revshift comes back with anything potentially mind-changing.

IamFODI · 05-27-2023, 04:25 PM

Wow. Got an amazingly fast answer – on a weekend, no less. Nice counterpoint to all the allegations of horrible customer service.

No, they're not round; yes, that's for easy installation, esp. in out-of-round bores. Apparently they provide 6 points of contact with the bore.

On the "sandwich" aspect: they allege that one-piece designs can allow the subframe to move up to an inch vertically. Has anyone heard of that happening? If it were, wouldn't there be a lot of failures in short order as the steel subframe bores basically shredded the aluminum bushings? The fact that that's not happening makes me feel like it's not an issue.

Maybe the "sandwich" aspect of the Revshift bushings was necessary because of the not-entirely-round 2-piece design – i.e., less-tight fit with fewer points of contact = more potential for movement.

They also said the flange cutouts on all other designs are not functional, which is why their flanges go all the way around. Not sure how to reconcile that with TMS's instructions for their aluminum subframe bushings, which say you have to make sure the flanges are oriented correctly....

Revshift seems to be the only company making solid aluminum subframe bushings like this. AKG's offering is the only one I've seen that seems to be 2-piece, and they look round; all the others I've seen – Bimmerworld, TMS, Precision Works, CMP, etc. – are 1-piece and round. Makes me wonder if there's a reason...

Scharbag · 04-04-2024, 09:27 PM

Quote:

Originally Posted by IamFODI

Wow. Got an amazingly fast answer – on a weekend, no less. Nice counterpoint to all the allegations of horrible customer service.

No, they're not round; yes, that's for easy installation, esp. in out-of-round bores. Apparently they provide 6 points of contact with the bore.

On the "sandwich" aspect: they allege that one-piece designs can allow the subframe to move up to an inch vertically. Has anyone heard of that happening? If it were, wouldn't there be a lot of failures in short order as the steel subframe bores basically shredded the aluminum bushings? The fact that that's not happening makes me feel like it's not an issue.

Maybe the "sandwich" aspect of the Revshift bushings was necessary because of the not-entirely-round 2-piece design – i.e., less-tight fit with fewer points of contact = more potential for movement.

They also said the flange cutouts on all other designs are not functional, which is why their flanges go all the way around. Not sure how to reconcile that with TMS's instructions for their aluminum subframe bushings, which say you have to make sure the flanges are oriented correctly....

Revshift seems to be the only company making solid aluminum subframe bushings like this. AKG's offering is the only one I've seen that seems to be 2-piece, and they look round; all the others I've seen – Bimmerworld, TMS, Precision Works, CMP, etc. – are 1-piece and round. Makes me wonder if there's a reason...

What did you go with? I am also looking to pull the trigger on this and would like to know if the RevShift's from FCP are any good.

Cheers,

chocstraw · 04-19-2024, 01:57 PM

I have these and they work just fine. Quality aluminum, they pressed in just fine.

kaiv · Yesterday, 09:05 PM

Quote:

Originally Posted by IamFODI

On the "sandwich" aspect: they allege that one-piece designs can allow the subframe to move up to an inch vertically. Has anyone heard of that happening? If it were, wouldn't there be a lot of failures in short order as the steel subframe bores basically shredded the aluminum bushings? The fact that that's not happening makes me feel like it's not an issue.

FWIW every solid mount I've installed (Bimmerworld, Turner, AKG, CMP) have a nice interference fit where the subframe moving over the mounts is definitely not an issue.

10-20-2022, 08:45 AM	#1
IamFODI Lieutenant 366 Rep 404 Posts Drives: 2008 E90 M3 6MT Join Date: Dec 2018 Location: SE PA iTrader: (0)	Any experience with RevShift solid rear subframe mount bushings? Want to do solid subframe mount bushings in the next year or so and leaning toward RevShift because FCP Euro sells them. It's not that I expect to have to return them for wear or anything; I just like to stick with FCP Euro on principle where possible. Reviews on RevShift's other stuff seem to be... mixed. But I haven't seen any on their solid subframe mount bushings, and those seem like a really straightforward part. Anyone use this part and/or have any thoughts? Last edited by IamFODI; 05-27-2023 at 02:11 PM..
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10-20-2022, 09:00 AM	#2
DRLane Brigadier General 3989 Rep 3,411 Posts Drives: E92 M3 Join Date: Oct 2018 Location: Colorado iTrader: (21) Garage List 2008 m3 [6.63]	Go with solid aluminum, if you're pulling the subframe might as well do it once. __________________ Not a Doctor, those are just my initials.
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10-24-2022, 12:44 AM	#7
ganz Private First Class 150 Rep 120 Posts Drives: 2013 E92 "Stripper" Join Date: May 2013 Location: San Diego, CA iTrader: (0)	I have these subframe bushings (2-piece aluminum) in my car. No noticeable difference between these and other E9X that I have driven with Turner or MRF bushings. I went with these because of the claims around "sandwiching" the subframe which I have no clue whether makes any difference at all. The important thing is it doesn't make noise.
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10-26-2022, 01:32 PM	#8
e92zero Captain 212 Rep 875 Posts Drives: 2011 E92 BW Join Date: May 2010 Location: somewhere in US iTrader: (1)	That look interesting and probably make installation easier. But from the pic, it doesn't look like the part inserted into the subframe are round? Maybe it's designed for easy of installation. Not sure if it has any long term effect?
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10-26-2022, 06:53 PM	#9
Redd Brigadier General 3900 Rep 4,167 Posts Drives: 2010 BMW E92 M3 Dakar Edition Join Date: Jul 2015 Location: Malaysia iTrader: (0)	Were these Revshift two-piece units easier to install than the other one-piece ones?
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05-27-2023, 10:51 AM	#10
IamFODI Lieutenant 366 Rep 404 Posts Drives: 2008 E90 M3 6MT Join Date: Dec 2018 Location: SE PA iTrader: (0)	Coming back to this as I'm planning to order soon. I just emailed Revshift about e92zero's question and a couple more. We'll see what they say. For now, I'm kind of leaning toward another option like Bimmerworld. Hard to imagine Revshift knows more about how to build a product for this platform than Bimmerworld does. Let's see if Revshift comes back with anything potentially mind-changing.
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05-27-2023, 04:25 PM	#11
IamFODI Lieutenant 366 Rep 404 Posts Drives: 2008 E90 M3 6MT Join Date: Dec 2018 Location: SE PA iTrader: (0)	Wow. Got an amazingly fast answer – on a weekend, no less. Nice counterpoint to all the allegations of horrible customer service. No, they're not round; yes, that's for easy installation, esp. in out-of-round bores. Apparently they provide 6 points of contact with the bore. On the "sandwich" aspect: they allege that one-piece designs can allow the subframe to move up to an inch vertically. Has anyone heard of that happening? If it were, wouldn't there be a lot of failures in short order as the steel subframe bores basically shredded the aluminum bushings? The fact that that's not happening makes me feel like it's not an issue. Maybe the "sandwich" aspect of the Revshift bushings was necessary because of the not-entirely-round 2-piece design – i.e., less-tight fit with fewer points of contact = more potential for movement. They also said the flange cutouts on all other designs are not functional, which is why their flanges go all the way around. Not sure how to reconcile that with TMS's instructions for their aluminum subframe bushings, which say you have to make sure the flanges are oriented correctly.... Revshift seems to be the only company making solid aluminum subframe bushings like this. AKG's offering is the only one I've seen that seems to be 2-piece, and they look round; all the others I've seen – Bimmerworld, TMS, Precision Works, CMP, etc. – are 1-piece and round. Makes me wonder if there's a reason...
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04-19-2024, 01:57 PM	#13
chocstraw Lieutenant 496 Rep 457 Posts Drives: E92 M3 ZCP Join Date: Apr 2019 Location: Los Angeles iTrader: (0)	I have these and they work just fine. Quality aluminum, they pressed in just fine.
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