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Early V Late Rear Suspension

924Srr27l

924Srr27l

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I can't remember what Porsche did to make the rear Track wider from the early Et23 Wheels to the later Et52's ?

Anyone ? are the Trailing arms all the same (924S / 944 / 968)?

Is it the length of the Hubs that's wider? and if so are the driveshaft splines the same between early and late? EG can an early car be fitted with

late hubs?

R
 
As far as I know the later arms give the wider track. Early cars had 20mm or so spacers on the rear, later ones don't. The actual hubs are different, splines are different. I know as I wanted the longer studs from an early car to allow me to fit spacers, ended up having to replace the rear bearings as had to pull the hub. Early cars have different bearings (2 not one double row) and the hub is held on the outer end of the stub axle not pulled into the bearing. Changed to allow for fitting ABS sensors and then used 53.3mm offset wheels to bring it all back into line. I think 924S alloy trailing arms are the same dimensions as the steel 944 and 2.0 924 arms. 944 alloy arms are different for sure. 924S alloy arms also use the double row bearing
 
Sprint924 said:
As far as I know the later arms give the wider track. Early cars had 20mm or so spacers on the rear, later ones don't. The actual hubs are different, splines are different. I know as I wanted the longer studs from an early car to allow me to fit spacers, ended up having to replace the rear bearings as had to pull the hub. Early cars have different bearings (2 not one double row) and the hub is held on the outer end of the stub axle not pulled into the bearing. Changed to allow for fitting ABS sensors and then used 53.3mm offset wheels to bring it all back into line. I think 924S alloy trailing arms are the same dimensions as the steel 944 and 2.0 924 arms. 944 alloy arms are different for sure. 924S alloy arms also use the double row bearing
Click to expand...


I'm still not sure the arms are any different lengths 924/944/968 I'm sure my 924S arms have a 944 part number ?

I have found the Hubs and stubs to be longer which were used on the 86 onwards change back to ET50's wheels, as you say Spacers
is another option or just fitting low offset wheels like your car is another solution to increase the rear track...

It's just annoying that the 9x16" Rims from the rear of a 993 are ideal for the width with 245 tyres but the offset is a huge ET70! the wrong way...and Ideally I'm looking to
increase the rear track by 4" total width

R

 
Likes of EMC use late ally arms to give wider track. Could just be that it is easier to swap the entire arms than just the hubs and stubs. Guess the only way to know is to get hold of a pair of late 944 arms. I thought they are wider.

I have a pair of fibreglass 944 rear arches which I was going to use on my 924 before opting for the Carrera style arches. Used but straight. Also 944 front wings and front valence section (no bumper). Anyone interested then PM me.
 
924Srr27l said:
I can't remember what Porsche did to make the rear Track wider from the early Et23 Wheels to the later Et52's ?

Anyone ? are the Trailing arms all the same (924S / 944 / 968)?

Is it the length of the Hubs that's wider? and if so are the driveshaft splines the same between early and late? EG can an early car be fitted with

late hubs?

R
Click to expand...
I think from when I swapped from my 86 to my 90 turbo (20 years ago so hazy memory) the rear discs / drums are wider to accommodate the abs ring and the width looked to be forwards of the brake backplate. long time ago though so I could be miss remembering! I guess the discs are different early to late? and the later ones are deeper.
Tony
 
Ok so a thread on Rennlist has confirmed this for me now...

"all the aluminium rear control arms will fit any car early or late. Unlike the front, the offset at the rear is determined only by the hub. So, if you purchased your arms complete with stub axles and hubs fitted, the difference in the hubs will determine if they came off an early or late offset car, not the arm."

R
 
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