[cleex024]

Hey guys just wondering which ones you would choose...i just spoke with vac and they told me that the powerflex polyurethane subframe bushings would be the best but im afraid of it being too stiff or noisy.

they said that there is no difference between the powerflex and the m3 bushings as far as noise goes but the powerflexes are a little more stiff and easier to install.

either way i was hoping someone on here had experience with either. please let me know thanks.

[enrita]

Go M3, also search in the proper section.

[nitehawk]

Was thinking about this as well.

[benzy89]

No personal experience, but I've been looking in doing a full M3 suspension conversion (they sell it as a package from Tischer) -- For a DD it'd prob be enough of an upgrade (with an LSD, coilovers & springs) where it significantly upgrades the handling for my DD without killing my spine

[JamesM3M5]

Urethane bushings are not great - they can slip and move in subframe applications. You have to ensure they can't move. I use them on racecars in certain applications, but only carefully. The M3 bushings are not easy to install, but they hold up much better and don't slip like urethane bushings.

The M3 arm conversion set from Tischer is good. Not all of the M3 arms fit non-Ms, but Tischer only sells the ones that will work. I've machined E36 balljoints to fit all of the rubber bushings on the E9x rear ends for racecars, and that would be the ultimate ideal.

[benzy89]

I think the Tischer kit $2k (Control Arms, Guide Rods, Strut Braces, Wishbones + Sway Bars) and then for another $240 you get the rear M3 subframe bushings

[cvc 22349a]

M3 subframe bushings are ok, but I still have straight line tracking problems.
No experience with Powerflex, but past experience with polyurethane was sqeaky. VAC should be a good source of info.
If you don't mind an increase in NVH and have a high HP car, look at Turner's solid Delrin mounts or BMW Motorsport group N bushings; the latter will set you back $800.
Wrong sub forum btw

[cleex024]

well this sucks because i still cant make up my mind...and i do see what you mean by they can slip cause that is the main reason why vac recommended them was for an easier install.

i really wanna know if there is any downsides to the powerflexes as they are only $50 more but saves like $150 in install...but if there is any downsides then i might as well just get the m3 bushings.

[boostaholic786]

I think the poly's for daily driver use are a little to much. Not so much in the stiffness of the way the car sits when you romp on it, but more so just cruising or heading to work early in the morning during traffic lol. Going over the slightest offsets in the road, your going to feel. I would go with the M3 ones. I have them and could tell a major difference especially when paired up with a LSD

[akotten]

I have the M3's in my car and love them! They're a great upgrade and an OEM part.

[georgelb]

Originally Posted by boostaholic786

I think the poly's for daily driver use are a little to much. Not so much in the stiffness of the way the car sits when you romp on it, but more so just cruising or heading to work early in the morning during traffic lol. Going over the slightest offsets in the road, your going to feel. I would go with the M3 ones. I have them and could tell a major difference especially when paired up with a LSD

Yeah, the poly ones definitely give you much more road feedback. I don't have them in this car, but I replaced all the bushings in my last car with graphite impregnated poly bushings (Energy Suspension) and it was as described above, though that is what I was looking for...you'll definitely feel the road much more with them, all the time. They didn't add any noise though, but I lubed the crap out of them before putting them in.

[Rotorocious]

+1 for the M3 bushings.
Be sure to examine your diff bushings also. Mine were toast after 75k. replaced them with turners aluminum ones and should be good forever now.

[EFI Logics]

The polyurethane Powerflex bushings should be a bit more firm than the M3 bushings, but can squeak a little if not generously lubricated. I have used polyurethane on a few different cars of mine with good results all around. It's not a bad material to use for a bushing replacement. The M3 bushings will definitely give you a noticeable improvement as well like many members around here will tell you. Neither choice is bad. In my opinion, price is probably the biggest factor here.

-Josh

[cleex024]

well if price is really the only factor then its the powerflexes.

thanks

still taking more inputs as i wont have this done til probably next weekend.

[cvc 22349a]

^pm 'chowbow' and ask him how his Powerflex subframe bushing inserts are holding up. If your choices are limited to Powerflex and M3, go M3

[tres]

go delrin better than m3 and poly bushings

[cleex024]

Originally Posted by tres

go delrin better than m3 and poly bushings

how so? and who makes one.

[tres]

The solid delrin is the best to keep the subframe intact for better launches and stability. Turnermotorsports makes them. http://www.turnermotorsport.com/BMW-...nd-mounts.aspx

Originally Posted by cleex024

how so? and who makes one.

[nitehawk]

Why do the Delrin ones cost twice as much as the M3 bushings tho? Is it that much better??

[nafoo]

Originally Posted by nitehawk

Why do the Delrin ones cost twice as much as the M3 bushings tho? Is it that much better??

Obviously, they are twice as good.

[DefactoM6]

Because racecar.

[99three]

M3 all the way. Don't compromise.