944CS

Hey i have the oppurtunity to buy aluminum control arms from a 924S. They have a 951 part number on the arms, but is it the torision bar tube that is different that makes their rear wheel track narrower? If the arms on that car are the same as the ones on the 944/951 i will get them but does anyone know for sure if they are?

DerSchlechtSpecht

Do you mean the trailing arms?

Christian

Skip

I'm not entirely sure the cast arms will bolt up to the early 944 torsion tube, but the parts are different. I think this may only have to do with the ears for the torque tube.

FYI, the 924 and early 944 (83-85.1) use the torsion tube 477.500.053F while the late cars (85.5+) use 944.331.045.02

The offset is a non-issue - the running gear is the same throughout the range... the offset for the 924 bodied cars with 944 suspension is made up for in the wheels only.

Also, if you are getting this from a M030 equipped car (sport suspension), then you get the upgraded torsion bars (24.5mm vice 23.5mm)

My question would be why? The early arms are sufficiently strong (in fact, better suited for use with coil-overs). The later arms bring difficult wheel bearing service. IMHO, I don't see this as an upgrade.

Good Luck!

Dave951M

On the torque tube, the only difference I have been able to determine is the addition of the collision ears.

M758

I replaced the rear trailing arms on my race car.
I had the stamped steel ones and replaced these with 87 924S arms from my parts cars. I did it because I had them and was told they were stiffer than the steel ones. These arms are 86 944 Turbo units. They are also lighter.

They actually bolt up directly to an early torsion bar carrier with one modification.

<img src="http://www.tech-session.com/kb/admin/images/44037.jpg" alt=" - " />

The spring plate (labeled as trailing blade above) is different. I believe a late one for aluminium arms will work with steel arms, but the early one will not work with aluminum arms.

In order to solve this you have two options.
1) Replace entire torsion bar assembly with late model one.

2) Just replace the spring plates. These are removable from the t-bar carrier. In doing this you will need to re-index the t-bars or at least do it one side at at time to retain ride height. If you plan on doing the torsion bars this is great time to swap these out.

There are a couple more things you need as well.

1) brake lines for the alu arms. These are different from the steel.

2) Shocks are slightly different

3) 1/2 shafts are longer on the aluminium arms.

It sounds like big job and it is. I did it because I had all the parts on hand since I have 924S parts car and needed to do the t-bars anyway.

Skip

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by M758:
<strong> <img src="http://www.tech-session.com/kb/admin/images/44037.jpg" alt=" - " />

The spring plate (labeled as trailing blade above)...</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">So, what are you saying... I labeled the picture incorrectly <img border="0" title="" alt="[Wink]" src="wink.gif" /> Yeah, yeah... I'll get to it <img border="0" alt="[oops]" title="" src="graemlins/oops.gif" />

Skip

M758

Hey skip..
That is just what I call it. Trailing blade sounds cool anyway. <img border="0" alt="[thumbsup]" title="" src="graemlins/bigok.gif" /> Heck the assmebly may be a spring plate, but the individual part labeled my by the trailing blade.
After all you are the addict. <img border="0" title="" alt="[Wink]" src="wink.gif" />

<img border="0" alt="[bigbye]" title="" src="graemlins/xyxwave.gif" />

944CS

My reason for wanting to do this swap is because: 1-one of my steel arms is bad.
2-the aluminium arms are lighter
3-they are available cheap at a junkyard, whereas the steel ones are not
4-i believe they will widen the rear track, therefore i wont have to spend money on studs and spacers

M758

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by 944CS:
<strong>My reason for wanting to do this swap is because: 1-one of my steel arms is bad.
2-the aluminium arms are lighter
3-they are available cheap at a junkyard, whereas the steel ones are not
4-i believe they will widen the rear track, therefore i wont have to spend money on studs and spacers</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">1 = OK good reason
2 = Good reason
3 = Odd, but I would figure steel is cheaper. I'd bet it is the same arm from a VW super beetle. Not to mention cheaper overall since you need only one and not all the other stuff.
4 = They do not do anything to the rear track. It is the same if you use 86 NA or Turbo or 924S parts.
It will be different if you use 87 or later parts the offset will be different and the track will be wider.

If I were you I'd just get another steel arm and be done with it. It is much cheaper and easier.