Hello everybody !

First of all, as I am a new menber, let me introduce myself,

After restoring a 911SC, I bought a 914/4 . After buying, I discover major rust on the body. By chance I know a very clever body worker, and the job is on the way.

Last summer, I had the opportunity to buy a 914/, second hand, in very good condition, so I bought it.

At the moment, I am having a look at the front brake system, and there is something I do not understad very well.

On my PET, the référence for the rotors is 477.405.083A (20mm thick, the same as for the SC)
And on the rotors I have on the car, the engraved reference is 901.351.041.16 , 18,5mm thick (my PET says they are for 911 T/E/S) with calipers ATE 245

My questions are :
- will the calipers be OK with the rotors 477.405.083A ?
- what are the differences between the M,S,A calipers?

Many thanks for your answers,

I apologize for my poor english, but you know, I am a frenchie...

Jeff

To answer your questions:

Yes, the 20mm rotor will be fine and is what everyone sells for that application.

M-Calipers:


* 48mm Pistons
* Steel
* Ribe M8 Fasteners (13mm nuts)
* AP31 pad size (same as the early 914 front and 914-6 rear)
* Side Fluid inlet
* 3" mounting ear spacing
* 7lbs 6oz without pads

S-Caliper:


* 48mm Pistons
* Aluminum
* Early units are cast off the 908 caliper casting and are clear anodized.
* Later units are a combination of the 910 style nose and 908 rear and are greenish in color due to the dichromate sealant.
* AP45T pad size (same as the A-Caliper but the "T" stands for thicker)
* Side Fluid inlet
* 3.5" mounting ear spacing
* 5lbs 6oz without pads

A-Caliper:


* 48mm Pistons
* Steel
* Ribe M9 Fasteners (14mm nuts but small R6 heads)
* AP45 pad size (same as the S-Caliper but not as thick)
* Fluid inlet on the bottom of the widows peak in the back
* 3.5" mounting ear spacing
* Heaviest caliper ever made for a Porsche at 9lbs 4oz without pads. Read: PIG in the unsprung weight category.

Hope that helps. You're English is great!

Unfortunately yours isn't.

Thanks a lot for your welcome, I do appréciate

And thanks so much to Eric for all the informations and the pictures. That's a great help !

I had a look at my calipers, and as the nuts are 13 mm Hex., they seem to be M version. I will check the distance between ears on tomorow,

Jeff

correct. "Your" English is great.



No need to check... 13mm = M-Calipers. They will be the 3" spacing. Stock for a 914-6. Happy to help.

Your making fun of me...

your'snot would have been closer.

We don't make fun of you Eric .... you're quite capable of that yourself. In fact, I have always thought of you as about 2 cards short of a full dick.