ideola

We were the first Porsche specialist in the US to offer PowerFlex Polyurethane Bushings. Now, we are the first Porsche specialist in the US to offer PowerFlex's new Black Series for Race applications. We have also expanded our offering to include the entire range of Porsche models supported by PowerFlex:

• 1965-67 911
• 1968-69 911
• 1970-73 911
• 1974-77 911 & 911 Turbo
• 1977-86 911
• 1987-89 911 & 1978-89 930
• 1989-94 911 (964)
• 1994-98 (993)
• 1997-2005 911 (996)
• 2006-12 911 (997)
• 2006-12 911GT2/GT3/GT3RS (997)
• 1977-85 924/931/924S/944
• 1985.5-1995 944/951/968
• 1997-2004 Boxster (986)
• 2005-12 Boxster/Cayman (987)

Another Ideola exclusive: To ease with ordering, we have custom-developed an exclusive "Kit Builder" feature that allows you to quickly select the durometer you desire, along with the specific bushings you would like to bundle into your kit. Each model range is accompanied with a handy diagram and numbering menu to help you identify which bushings to order for your application.

Click here =>PowerFlex Porsche Application Guide

The original "Street" (Purple) bushes were engineered from an 80A shore material to provide a firmer-than-rubber alternative, while minimizing NVH commonly associated with poly bushings. As such, PowerFlex Street bushings are stiffer than the OEM bushings, but retain some compliance to be suitable for street driving.

The new "Race" (Black) bushes are manufactured from a 90A shore material to provide maximum stiffness at the same affordable cost of the Purple street material. We have added a Durometer Selection Guide that discusses this topic in more detail. For enthusiasts looking for the best geometry-preserving alternative without going to the expense of solid bronze bushings, PowerFlex Black Series offers the perfect solution. Ideally suited for AutoCross, PCA Club Racing, 944 Cup, Spec944, SCCA, and NASA racing classes (check your class rules, of course!).


Exclusive Offer on Facebook
This week only, we are offering a special package deal for 924/944/968 enthusiasts, which is available exclusively via our Facebook page. If you haven't already done so, please "like" our page, and check out the special offer pinned to the top of our news feed.

Chunkerz

Perfect timing! I'm getting ready to replace all of the suspension rubber on my car and I might as well upgrade to these while I'm in there.

SpeedyC2

I recently had all the major suspension bushings on my S2 replaced with Powerflex bushings and have to say I am exrtremely pleased with the result. Ride and handling both improved enormously. I use the car as an occasional DD and DE car, typically attending 2-3 DE's a year.

I have no affiliation with Powerflex or Ideola's garage...

V2Rocket

Better ride becauseof the compliant material, or were your rubbers just shot?

ideola

@Speedy, thanks for the comments.

Also, out of curiosity, did you use the purple "Street" or the black "Race" versions?

SpeedyC2

I think the best answer would be yes to both. The ride quality is excellent.

I used the "Street" bushings, and am truly impressed with the results. I will say at the same time I replaced the bushings I installed 27 mm torsion bars and the 19mm 3-way rear sway bar. The front sway is the stock 26.8mm.

On both street and track I couldn't be happier with the result. I am shooting for a "Club Sport" type of car which is great on the street and suitable for occasional track use, and feel like this suspension setup nails it.

Chunkerz

Did you replace all of the suspension bushings or just certain ones?

SpeedyC2

I replaced the forward and back front control arm bushings, and the rear trailing arm and inside and outside torsion bar bushings - so five bushings total, per side.

I had previously replaced the front and rear sway bar bushings with new OEM, so I left those as-is.

Chunkerz

I see. It's over $700 to replace all of the bushings with the PowerFlex street bushings. I'd better start saving my pennies...

ideola

The rear bushings for the torsion carrier are where most of the expense is. The big ones at the pivot point (spring plate to torsion carrier) are $108 (for both sides), and the big ones where the torsion carrier attaches to the chassis are $106. If you're not planning to change your torsion bars, you could consider waiting to do those later. But if you have the whole torsion carrier out, now is the time to do it.

I will honor the same discount currently offered on my FB page through the end of the week for any multi-bushing purchase. You can either use the normal website to configure your kit, and I will issue a discount refund, or you can send me a PM or email with the bushings you want and I can send you a custom invoice.

Kit configurator for early 924/944
Kit configurator for late 944/968

V2Rocket

After a quick look-around, new OEM-spec rubber bushings cost almost the same as these purple polyurethane ones for the trailing arm/spring plate...which would really offer the best ride quality?

Fara

I've been considering these poly bushings for a while.
From what I've read, the PowerFlex bushings have a great reputation and great quality.

I'm planning on picking up a full set of purples when I do my complete suspension refresh on my car (I'm not pulling off those Torsion carriers unless I have to)

Chunkerz

I'm planning to upgrade my torsion bars so I might as well fork out the cash while I'm in there...
I would assume the softer stock rubber bushings would offer the best ride quality.

Do these bushings need to be greased to prevent squeaking?

ideola

The OEM bushing for the torsion carrier to body is $184 (pair). The trailing arm to torsion carrier is $194 (pair). So actually quite a bit more expensive than the poly option.
http://garage.ideola.com/prod-Suspen...rades.html#OEM

Also, the OEM units at the spring plate to torsion carrier have no OEM option for replacement because the rubber is vulcanized onto the spring steel, so if those are worn (which they almost always are), there is no option except for polyurethane or poly-bronze (both of which are available on my site).

The purple will be a bit firmer, but not rattle-your-fillings firm. So I guess it depends on what you mean by ride quality. The rubber will definitely be more compliant and therefore more squishy, but as a result will not handle and corner as well.

The PowerFlex packages all come with their recommended copper-based grease, plenty to lubricate each bushing. I have heard no complaints yet from anyone about squeaking, but if you're really concerned about that, you might consider installing zerk fittings while you're rebuilding the suspension. Here is an excellent tutorial on how to do so (although you will not need to make your own channels in the PowerFlex bushes): http://www.924board.org/viewtopic.php?t=20836
Note that the tutorial only shows how to do the castor block on an early steel A-arm, but the same approach would be used to install on pretty much all of the chassis points (i.e., not really necessary on the sway bar bushings).

V2Rocket

You're right, I miscalculated somewhat in my quick search. Good deal you've got going.

Do you have any estimates of "service life" for these bushings, so long as they are greased properly at installation (and occasionally afterwards?)...10+ years?