It's been a while since I've been on here.....

But I have a question which I'm sure a few will know about hopefuly……

Aluminium Trailing arms, are they all the same for all models 924S / 944 / 968 or are there some differences for the 2 different caliper ttypes ?

Only I have a pair which are part number which starts 951 but unyet the caliper holes are for the steel caliper, does the rear Brembo caliper have the same hole
spacing? or is it different and another part number trailing arm used ? Only the 951 part number made me think these arms were from a Turbo

R

 

on my 924S the part numbers are 95133102101 / 95133102201

 

Ok thanks, the arms I have 2 sets of numbers on each R/H 951 331 5134 & 5130, L/H 951 331 5144 & 5140

R

 

the 944 turbo (alloy) calipers and the regular 944 NA/Lux/2.7 calipers both have 95mm bolt spacing for the rear.

i cant help with part numbers.

 

Ok, so it looks like the Trailing arms are all the same (first came on the 1st 944 Turbo in 1985 I think hence the 951 part number) and they must of got Brembo
to make a caliper then exactly the same bolt width as the Iron Caliper.

The Brembo is a different height (+10) though and bigger diameter discs are required 299 instead of 289...

I've making up a set of Trailing arms for the Race car (with Spherical bearings and a torsion tube delete) and I wanted to retain my current Wilwood Calipers.
The Trailing arms are the later type offset so the discs I'll need to change to the larger bell versions.

The 924srr27l was taken off the street in 2017 and became a full time Endurance racer, this year will be the 3rd year competing and the car's having a raft of modifications to make it faster still.

The 2.7 Engine is still going strong, totally reliable and still all using the stock Bosch AFM / Fueling and Ignition etc..and the same mapping.
The lightweight internals and the short stroke (2.5 Crank) knife edged and the larger 105mm bore it's very easy to drive and competitive against newer machinery..
On most circuits only 3rd and 4th gear are used sometimes 5th for a short period but never 2nd it's that torquey.

R

 

Couple of miss understandings:

1. The aluminum trailing arms were first introduced on the 1985.5 944na.

2. The very late 1988-91 S-spec arms are different according to PET.

3. The offset is determined by the hub not the arm, the same arm was used on both early and late offset cars, but yes you will need the later na brake rotors/discs to fit the late offset hubs.

 

My guess is the later spec arms had the provisions for ABS sensors, but that is probably the only difference.

 

Does this mean then that the owners with the rear Iron calipers & 289mm discs can change to the Brembo calipers and 299mm discs...as it all bolts on ?

R

 

Yes. I mounted 944S2 calipers into 924s. Just used factory spacers (listed in PET).

 

can anyone clarify:
I have a 931, I like that I can use late offset wheels with out spacers. (the car comes with 20mm spacers on the rear from the factory) so If I pull off the factory spacers, many late offset wheels will fit.

I have a set of the Alu trailing arms from my 86 951 (swapped to late offset, I swapped the whole arm and axle).

Can I install the old/early 951 trailing arms into the 931 WITHOUT changing offset and still being able to use late offset wheels?
Currently et55 rear wheels barely clear the fender and I want to stay with the narrow body.

 

anyone?

 

I thought all the 924’s had early offset suspension.