Powerflex rear subframe inserts

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RDowson
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Re: Powerflex rear subframe inserts

Post by RDowson » Mon Feb 26, 2018 1:59 pm

Does anyone have a link to a good set of axel stands that are flat so they can support one of the pucks for going into the jack point?

Most of the ones that I have looked at aren't flat so you couldn't rest one of the pucks on it.
M140i Shadow Edition - Sunset Orange - M Performance Exhaust - Front Silencer Delete - Bimecc Spacers - Bluespark - Motech Eibach Springs - M Performance Bump Stops - Powerflex Subframe Inserts - Underbelly Brace - Pipercross Filter

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Re: Powerflex rear subframe inserts

Post by OK51MON » Wed Feb 28, 2018 7:57 am

If you are local to Windsor I have a scissor lift so can do it at mine.

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Re: Powerflex rear subframe inserts

Post by OK51MON » Wed Feb 28, 2018 7:59 am

Is it worth fitting the two diff inserts?

Has anyone changed these out for uprated ones?

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Re: Powerflex rear subframe inserts

Post by marco_polo » Wed Feb 28, 2018 8:54 am

Too much NVH for 99% of people, I doubt anyone has solid-diff'ed a Daily.
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Re: Powerflex rear subframe inserts

Post by Blind Pugh » Wed Feb 28, 2018 9:28 am

OK51MON wrote:
Wed Feb 28, 2018 7:57 am
If you are local to Windsor I have a scissor lift so can do it at mine.
Jealous of yr lift...8)
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Re: Powerflex rear subframe inserts

Post by OK51MON » Wed Feb 28, 2018 11:10 am

Blind Pugh wrote:
Wed Feb 28, 2018 9:28 am
OK51MON wrote:
Wed Feb 28, 2018 7:57 am
If you are local to Windsor I have a scissor lift so can do it at mine.
Jealous of yr lift...8)
Best tool I've ever bought after a boost leak tester.. You'll never want to use axel stands again, never.

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Re: Powerflex rear subframe inserts

Post by Willel » Thu Mar 15, 2018 6:26 pm

marco_polo wrote:
Wed Feb 21, 2018 8:56 am
Don't do what I did and order the Black ones, they just caused horrible NVH. Yellows are the smart choice.

There's no way I'd be trying to remove the standard bushes, that's hell of a job.

N.B. My stock bushes were solid from side to side, the voids only allow a little fore-aft movement.
Sorry to dig up this post/thread again, but I'm conflicted and could use some extra info ...

Marco_polo could you give a little more detail on what the impact was?
I'm talking to a local shop, and they're basicly calling me an idiot for considering anything other than black, saying the NVH difference yellow-black is a low single digit percentage. And to be honest other than your experience I can't find many bad ones about black inserts (only on other BMW models however).

So now I'm wondering if there's something specific about Mlite's that makes em respond badly to the black ones, or if maybe it was just your setup ...
Also the fact that black ones are ehm, black, is important to me. Would really like it if someone convinced me to go black and never go back!

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Re: Powerflex rear subframe inserts

Post by marco_polo » Thu Mar 15, 2018 10:54 pm

Rock solid ride, loads of noise, vibrations and harshness, don't do it. For a track only car you could go Blacks, but I couldn't tolerate them for a road car.

I ended up cutting mine up (removing the lower rings completely with a Stanley knife) as I couldn't live with them:

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Re: Powerflex rear subframe inserts

Post by NISFAN » Fri Mar 16, 2018 9:54 am

Marco, does the ring take up the natural gap in the bushing to body, meaning it is now directly in contact?


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Re: Powerflex rear subframe inserts

Post by marco_polo » Fri Mar 16, 2018 10:29 am

Yup, basically solid mounts the subframe, gaps gone.

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Re: Powerflex rear subframe inserts

Post by RDowson » Mon Apr 23, 2018 1:19 pm

I'm getting the yellow ones fitted at the same time as my Motech springs.

Can't wait to see how the car handles after they've been fitted!
M140i Shadow Edition - Sunset Orange - M Performance Exhaust - Front Silencer Delete - Bimecc Spacers - Bluespark - Motech Eibach Springs - M Performance Bump Stops - Powerflex Subframe Inserts - Underbelly Brace - Pipercross Filter

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Re: Powerflex rear subframe inserts

Post by GBC80 » Wed Apr 25, 2018 1:29 pm

4wdrift wrote:
Wed Feb 21, 2018 3:21 am
Just installed the Powerflex subframe yellow polyurethane inserts and I can't believe much more planted and less floaty my car is now especially with rapid acceleration from tootling speeds! :)

Out of all the mods I've put in (in chronological order) - F21 chassis brace, rear Bird's (softer than M140i std, barely any lower) springs, M4 LCA, this mod to my eyes has been the best one yet.

I'd urge anyone who has bought a M140i (M240i also?) to do these inserts (better still, solid bushes if you can at the outset), then put the F21 brace in.

Whilst I'm very happy in the improvement, it leaves me a little sad that as a non-engineer, non-trackday person that I have to do this stuff to the car to get it to handle and ride in a manner that befits such a car.. :?
I'm thinking about getting the Bilstein B12 Pro kit with the Eibach's on my F21 M135i to try and improve the ride on day-to-day, to get it a bit more "settled" and stop that erratic behaviour you get. Would you recommend doing this too at at the same time or would it get too stiff and potentially compromise comfort? Thanks
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