JPRA64

..and just incase i start coming across good deals, why does the the 1/2 washer need to be used for in the rear and i thought propotioning valves were used for cars with drums in the rear??

bordin34

In the rear the turbo caliper has to be shimmed with a washer so it fits centered over the rotor.
N/A cars didnt have the proportioning valve while the turbos did. If you dont add one the rear will lock up before the front, not good.

MAGK944

You need the calipers spacers in the rear so that the caliper is centrally located to the rotor.

Prop valve is on the turbo master to correctly "proportion" or bias the brakes on the turbo calipers. It basically allows more pressure to the rear brakes than on the na for more brake balance when using the turbo calipers.

JPRA64

@arthropraxis- i do have new ceramic pads(in the front) and fresh dot 4 ap racing 600 bf and i will say i dont want more brake performance(well i do) or looks as so much upgrade the caliper design. i thought it would have been easier than i had thought.

arthropraxis

It does seem like a lot of money and work for not much benefit. My brakes seemed a little too hard, pulled the pads and they are EE rated. That isn't much better coefficient of friction than metal to metal.

JPRA64

soo would i need the turbo master?? or the proportion valve goes inline somewheres?

JPRA64

maybe ill make it my winter project.. i always wanted a new set of rims

bordin34

You just need the prop valve is goes straight into the master.
For some great pads go for Porterfield R4-S

arthropraxis

I just ordered a set about an hour ago.

KevinGross

I disagree with the statement that the turbo brakes are a waste. It depends on your use. I struggled with the stock brakes on my 87 944S at the track, some tracks in particular: despite a brake cooling kit, carbon pads, etc., I frequently overheated the pads and fluid. Once I put a set of turbo calipers (from an '87 951), never had those problems.

People have listed out the parts in this thread. My recollection is:

- calipers and pads (of course)
- rotors
- steering knuckles (you'll need ones from an '86 951)
- proportioning valve (I already had one, stock on the 944S)
- rear lines *maybe*
- wheels: 16" because the 15" won't clear the caliper
- hardware: caliper bolts all round, spacer washers for the rears, and I'd recommend replacing any other fastener you touch incl. the camber adjuster, pinch bolt for the control arm ball joint.
- hoses: good time to put a fresh set of OE rubber hoses on the car

On the rear lines, the fiche showed a different p/n for the turbo, but I couldn't see a difference between the 944S and Turbo parts.

If you're installing a used set of calipers, have them torn down, cleaned, and rebuilt. Corrosion under the stainless steel end plates is a chronic issue. Remove the plates, clean out corrosion, seal with a good paint such as Wurth Rust Guard.

Kevin
Catellus Engineering

bordin34

For the rear lines, you have to slightly bend them by hand to make them fit.
My comparison between my N/A and Turbo brakes is this. The turbo brakes have much better feel, fade resistance, and in general make you feel more confident in the car. However my results are very skewed. My N/A brakes very in poor condition, the rotors were below minimum thickness, the pads weren't of good quality, and I could overheat them and lose much of my braking ability in a 45 second AutoX run or after one 60-0 stop on the highway. I also upgraded to stainless lines at the same time as adding turbo brakes.
So I really don't know how much of my better brake feel and confidence came from the turbo brakes and how much came from having the braking system in proper condition.

Will Feather

In my opinion the N/A brakes are plenty strong. Put a good set of pads on and they are a great fit. Anyone racing 944Cup and many other classes stick with the stock brakes. Those N/A brakes have always locked right up for me! My turbo's brakes actually seem bit weaker, probably because the performance pads I run never warm up enough on the street.

And when it come to 16" Fuchs, if you are running 86' turbo breaks/spindles you NEED 86' part numbered 951 Fuchs. Regular part number 911 16" fuchs do not clear. Ask me how I know..

MAGK944

I would say they needed a rebuild and better fluid. NA calipers are cheap and easy to rebuild which is another plus. Plenty being run to the max in spec class without issue for many years.