RTAB limiters

[Jembo]

They’re more expensive than PowerFlex which I’ve had before (& likened on my 3.0) though supposed to last even longer... which on a //M will be tested

Supposed to? Have you ever seen a powerflex rtab fail?
I've had them on my car for 7 years now, how long have you had yours?
I dont think there is a version out there that's been more thoroughly tested than the powerflex ones.

First had my old 3.0 back in 2010/11 so probably now the same age, though as sold in 2014 can’t say how well have stood up to the pounding.

However, I found there was still some movement hence why deciding to try both new poly limiters & bushes... & maybe just because I like the name chose RE this time rather than PF, as car has RE top mounts.

Always nice to be slightly different & should they ever turn out to be ‘pants’ with 340 ponies (rather than the old 230 ponies) I’ll certainly let everyone know

[GuidoK]

The powerflex ones at least hold up 7 years/40k miles with 380 ponies/465nm torque with no problems at all.
As I said, probably the most tested and used rtab and never seen one fail.
Inspected them a few months ago when fitting eibach camber arms, and still looked like new. Top quality product.

Regarding the earlier recommended PSB bushings in this topic: I would steer clear of those. I had them for the rear diff mount (in the days other companies still didnt have an alternative), and they failed. It had a design flaw, as a few people on e46zone had exactly the same failure. Sub par quality materials used.
That was btw the only poly bushing I ever had that failed. All powerflex and strongflex bushings have held up nicely till now, all 23 of them.

[Jembo]

Out of interest, other than polybushing the ARB’s & main RTAB, any other of those robber joints you’d suggest getting done (with pics if possible)

Cheers

[R60BBA]

Go for polybushes mate.

Mines booked in next month to get these and rear coil springs done.

Apparently you should make sure that the bushes are greased properly otherwise I’ve heard that they can squeak.

[Bodyboarder]

.... but can I fit the limiters with out new bushing? ( oem or poly )

[Jembo]

.... but can I fit the limiters with out new bushing? ( oem or poly )

You can... though on a 50k car are likely to be shot.

Some prefer OEM bushes + shims (otherwise known as limiters), some just fit polybushes & some poly everything in sight

[GuidoK]

Out of interest, other than polybushing the ARB’s & main RTAB, any other of those robber joints you’d suggest getting done (with pics if possible)

Cheers

fcab's rtab's and arb bushings (front/rear) make the most difference in handling imho and are quite easily changed.
the rear upper/lower arm and subframe bushings give some more feel in the chassis, so you can feel a bit more accurate what the back end does.
But they are hard to exchange compared to those other bushings.
The rear diff bushing (on non z4m at least) is also a known failure point.

[Markos_Z4]

i have powerflex rear bushings no problems so far ! just use enough grease they will make noise if you not use enough grease

[markprz86]

Are there any guides on performing the RTAB limiter install on the Z4?

I can't seem to find any.

[Jembo]

It’s exactly the same process as the RTAB’s, they just slot into the space, even if a real squeeze with new bushes & limiters

There is a guide on here somewhere & you need a special very expensive alignment tool... here’s jantekin using his one while I helped change his RTAB’s

[G600]

I don't suppose anyone has a set they can measure? Ive got a lathe so I'd like to make my own without having to take the car apart to measure up