Carl Fausett

Lizard,

You are forgetting the pre-load that is required for the bushing to be designed properly. It is usually on the order of .005" to .008" in a polyurethane bushing depending on the application.

When the polyurethane is properly pre-loaded, the part will not "spin" easily in the poly bushing. It is very snug and not easy to turn. For example, you can see in our instructions that the poly bushings do not slide or slip in place. They have to be pressed into position with a press or screw. Its a tight fit with the required compressive pre-load designed in.

Having said that, I will add these are graphite-impregnated bushings, so they are self-lubricating and no, they do not squeak.

Where I will agree with you is longevity. No question the rubber components will outlast polyurthane suspension bits in street use. This is one of those many places where some of (A) long service intervals is given up for (B) better performance.

Lizard928

Carl,

The preload just helps the longevity slightly.
And while they may not spin easily, they do still spin. Where spinning occurs, wear occurs.

I stand by that I would go full heim jointed suspension before considering these.

OBehave

Really? I guess then these guys have made alot of money on a bad idea that doesn't work. I'm sure if that was the case they would not be in business as long as they have.
http://energysuspension.com/
http://prothane.com/
http://powerflexusa.com/

Lizard928

Ed,
Please show me one PRO team that uses those.

FBIII

We're not pro drivers and 99% drive on the street.

M. Requin

One thing is for sure, stay out of the Ecuadorian Amazon! http://en.wikipedia.org/wiki/Polyurethane

Speedtoys

True, but is it better than OEM?

hacker-pschorr

I have no dog in this hunt but justifying a product or idea just because someone else makes a profit with a similar product doesn't mean squat.

How about a real discussion on suspension pros / cons and why these would or wouldn't work for certain applications with real data, not just links to other products?

OBehave

That is a ridiculous request as neither you or I know what every Pro racing team is doing. Also I don't know of any Pro 928 racing teams and I don't believe Carl is trying to market Pro racing parts. I have used and know of plenty of people who use these types of bushings in many different vehicle makes for many different purposes and they don't resemble the "issues" that you describe as rapidly as you say happens.
You are entitled to your opinion and I am to mine, but I find your hard** for Carl a little tiring.

Not hunting here and I don't have the R&D data to contradict Colin's conviction. But I am a simple man with common sense and some experiences with products from these companies as well as poly and uhmw parts we make for industrial applications that exhibit none of his claims after tens of thousands of hours of constant non stop use under loads much higher than that of a motor vehicle.

andy-gts

Good discussion, I appreciate everyones opinion, many here have way more mechanical knowledge than I. But I guess passionate people have similar discussions.

If I wanted to tighten up the response of my suspension I would seriously consider Carls product!! I have purchased many items from 928 motor sports and find him the only supplier with the desire to keep coming up with products we might want....

andy

ROG100

We used to sell, and I personally used, the energysuspension sway bar bushes - I had so many complaints that they made no difference to handling but squeaked like a stuck pig. I stopped selling them and threw mine away. Stock was way better and so quiet. Same goes for aftermarket drop links (apart from those made by Louis Ott) the creaking and groaning from the 928 Specialists set drove me nuts. Went back to stock and really noticed no difference in performance and they were nice and quiet.
But my cars are fast street cars and I have no interest in the track.

OBehave

maybe they where installed wrong or the wrong bushing used possibly
The point here is rear control arm bushings.and any part installed wrong or not designed for the specific task at hand will not work properly. A general statement of they do not work,and "do not buy" I take offense at!

ROG100

Maybe I lost something in the translation - I sell a lot of parts and if they do not work I do not use them. So are you saying you use these sway bar bushes and drop links and they work correctly - help me out here my American English is not perfect 8>) You made the point that everything offered by companies such as Energysuspension is totally acceptable and works - I disagreed sorry. We do not all have to roll over and agree because you said it. I thought this was a discussion not a dictate. I pointed out parts that they supply that do not work for myself and a lot of my customers.
The point her is what Carl is offering is for track cars or an aftermarket alternative for street cars and those who drive track cars do not care about noise or having to pump grease into the bush to keep it lubricated. Why for a street car would you use a none stock part when the stock part is readily available. If you are on a budget, I understand, use an aftermarket part that may not be suitable for the application. But be prepared to accept the down sides.
I think Carl did a great job at coming up with an alternative - however does it work as well as the original under the original conditions it was designed for.

ROG100

When you make incorrect statements like this you open yourself for counter opinions and it is natural for people to offer their views.

I disagree this is a direct replacement for the original part - it is an alternative.

Part is no longer available is not true and misleading.

OBehave

Really!? Your should run for president of this country and you would probably win!