Bill Verburg

both Smart racing and factory publications spec x8 monoballs for the rear of a 993

there there are x10 arms

so the question is, which arms are excluded? I've always thought it was the toe link, which can also have a monoball or be replaced w/ Tarrett or Rennline or ERP links.


arm 1 leading A-arm
arm 5 trailing A-arm
arm 2 toe link
arm 3 camber link
arm 4 KT link

TheOtherEric

I posted this in the other thread. I think it answers the question, but unfortunately raises even more worrisome questions!!

bobt993

The bottom control arm has a solid bushing already from the factory. You should also do the solid bushings in on the large frame mounts if this solely a track car.

Bill Verburg

you need to be more specific

The A-arm oem has rubber bushes in both leading and trailing positions, these are pics of the RS arms I have on my car. The RS rubber bushes are marked w/ a green dot and are stiffer than stock at both the leading and trailing rear A-arm ends, On a stock 993 KTchanges are facilitated by the more elastic trailing A-arm bush(short leg)


stock 993 on top 993RS on bottom


Yes, I know and have solid side member mounts, but the question has come up as to where monoballs are used.

ERP Suspension shows x8, apparently the leading A-arm bush is left stock or RS. That is my question, does anybody have monoballs on both leading and trailing A-arm legs

jscott82

I just went through this very scenario... 3 control arms and 1 of 2 joints in the "A" arm. The other is already a monoball... I’ll have it apart tomorrow, can post a pic if you like.

Bill Verburg

Please do post some pics.

I've got an old 993 rear A-arm in front of me now, I can see rubber at both bushes, the leading(long leg) is extremely stiff, it feels solid and cannot be deflected by hand even w/ leverage. The trailing(short leg) is laughably pliant and is easily moved all over the place by hand w/ no leverage at all.

It's very possible that the leading one is already a rubber encase monoball type joint and that may be why it has't got a replacement monoball.

even the factory literature is confusing
here are the bushs that were available form the race dept.
993.331.042.80>R< & 993.331.041.80>R< which are the race rear A arms

the factory parts book also lists for the rear A-arms
x8 monoballs 999.593.067.00 >R<
x4 993.331.277.80>R< bush
x12 993.331.279.80 bush
x8 993.331.285.80>R< alu bush

Larry Herman

Bill, you are correct. The front "bushing" is a rubber covered monoball. If you were to buy the motorsports A arms like we did, you would find that both are monoballs.

Bill Verburg

Thanks, that's what I was looking for!!

so just to be clear, when you say motorsports A arm, we are talking a rear, 993 A-arm for a Cup, RSR or GT2 Evo?

and by "both are monoballs" the leading(long leg) has a rubber covered, no replaceable monoball and the rear(short leg) has the same or does the rear have a replaceable monoball as per the factory #'s

Larry Herman

Bill, the arms were for the RSR/GT2 Evo as I believe that the 993 Super Cup has hard rubber rear bushings (as did the 964 and 996 cups). The front is still the sealed street duty monoball. The rear bearing is the same as a replaceable open monoball.