nathanUK '81 930 G50

Is there more height adjustment with those aftermarket plates ?

Rob S

A very prominent Porsche race car builder, driver, and suspension specialist in this area (Greg Fordahl) won't use adjustable spring plates for track cars. He told me he has seen failures at the track that have resulted in collapse of the rear suspension. Based on his advice, I stuck with my stock spring plates and went through the old fashioned method of lowering. Disclaimer: I have no direct knowledge of adjustable spring plate problems, and I don't mean to start rumors, but I suggest anyone planning to use them should do a little research to verify their suitability before investing.

sand_man

I've heard the guys at Elephant Racing feel the same way. That the Sway-Away adjustable spring plates are sort of "clunky" in the way the adjusters work. Granted I'm not building a track car here. I'm probably gonna go with the Elephant Racing poly-bronz bushings/bearings and just index the splines and call it a day.

A930Rocket

I saw on Pelican where someone had this happen. Not sure if it's a bushing that issue might have played an a part of it. I suppose it could be prevented by adding a bolt through the two plates to secure them together. On the other hand, I have 10 years and thousands of track miles with them w/o problems. Knock on wood....

Rob S

Sandman and A930,

I suspect there are many people with successful histories with adjustable spring plates, and maybe a very small number who have had problems. And if there have been problems, they may not all have been related to this concern that was voiced to me. The best and the worst thing about a web forum like this is that information -- both accurate and inaccurate -- can be spread very quickly. I *really* don't know the story about this potential for adjustable spring plate issues, and I certainly don't want to worry those who are using them (or hurt the business of those who sell them or promote them). In my case, it was one person's advice (Fordahl) that I went with back when I was at that stage in my car's development, because I felt he had much more basis for having an opinion than I did. But I didn't verify his concern -- it was easy just to default to using the OEM spring plates, which I already had anyway. I sure don't want to start a rumor, but I felt it was worth sharing what I heard so others can sort out the truth and satisfy themselves.

A930Rocket

Rob, I hear ya. It doesn't take but one failure to make you a believer.

If you aren't going to corner weight your car every so often, then I would probably just stick with the stock spring plates I guess.

DeWolf

why do you have to re-index if you lower the rear, is'nt that the purpose of adjustable plates? I don't know, just asking. I've been told by a couple of Porsche mechanics that unless your tracking it, it is'nt really neccessary.

sand_man

Because the factory "adjustable" spring plates (the eccentrics) *might* not offer enough adjustablility. In which case you're looking at the actual t-bar splines to help it along. In addition, I'm thinking about installing the poly-bronze bushings/bearings in my rear t-bars, so I'd have to remove them (spring plates) for the install.

If you're talking about the Sway-Away adjustable spring plates, I still think you need to install them relatively close, which could mean going through the indexing process...then fine tune with the adjusters...although they do offer a wider range than the factory eccentrics.

While we're back on the subject, can anyone tell me if I just want to see how low I *could* make it with the factory adjuster, if I can do so by loosening the fasteners closest to the t-bar (obviously I'll get the special wrench), or do I need to separate the spring plate from the trailing arm?

sand_man

Giving this a bump!

Check this stuff out:

http://www.rebelracingproducts.com/S.../Steering.html

What do you guys think? I've heard many say that the 911 front tub was never meant to support the weight, there by needing reinforement welded in, but I'd sure like coil overs. Keep in mind my car is not tracked.

sand_man

Or what about running coils in the rear and keeping t-bars in the front?

srf506

Yasin,
The car looks great. I assume that's a proud set of parents peeking out the door.

Jim Parker

A930Rocket

For the street you are probable OK. For the track, unless unless you are braced properly front and back, I wouldn't do it. IMHO.

But, is it worth the money.....?