tconn

I'm planning on using big red brakes on the front of my
car and was wondering what to use on the rear.
Can I run front brakes off a 951 in the rear?
Is there a better rear setup others are using?

Thanks

Wormhole

Front 951 calipers on the rear is the way to go. Anything more is too much. You can always try different compounds and bias to get a good balance.

tconn

I would then use the front rotors on the rear also?

"Lindsey" has a two piece rotor for use with the big reds, any benefit to this?

Thanks

333pg333

Well they benefit of course...
sorry, looks a good car though.

Wormhole

"I would then use the front rotors on the rear also?

"Lindsey" has a two piece rotor for use with the big reds, any benefit to this?

Thanks"

No, you don't change the rotors. The calipers are interchangeable since are the same size, but the pistons from the front are slightly bigger.

The two piece rotor with the custom hat is lighter, not worth the extra $$ IMO.

reno808

I would go with them if rotor heat becomes a problem

Ski

You can use the 928 GTS rotor or the 3.6 turbo cross drilled rotor on the front; I agree save the $$. If you were racing and had a part time sponsor, sure. Cyro treatment is also a thought, I like it and our rotors on the track car are in great shape but over on the DE/Race forum, it's 50/50.

tconn

Bret, are you using cross drilled rotors?
I know there are different opinions on these, what's yours?
I'm using cross drilled on my 89 951 and have had no problems.

sawood12

I've still got the stock rear brakes on mine with big blacks up front. I have no probs with the performance or balance under braking, however I have noticed that my rear disks look like they are not being worked very hard and are showing signs of corrosion pitting, so I am looking for more rear bias. My concerns with fitting larger calipers to the rear is my brake pedal travel will get longer so i'm looking to keep the stock calipers and change the bias valve to give me more rear bias. My fronts also could do with a good refurb so replacing the bias valve is the cheaper option.

You couldn't fit the rotors off the front onto the rear. The offset is different so your rotor would end up too far outboard.

Ski

yeah, many opinions on cross drilled rotors. We have them on the track car, as we were given a set free when we bought the big blacks from my friend here in Heber who has the Cup Car; he was cleaning out his locker from old stuff. He used to own an 89 951 a long time ago.

We had them cryo treated and on the second set of front pads, as the rotors look and feel new.

I'm about to put big blacks on the street car soon, with the 3.6 rotor, which I will have cryo treated too. I don't need that performance level, even with the future 2.8L but what the hell, this will be my last upgrades on the car for sometime so I'm going for what I can get away with - you know, the boost controller in the kitchen.

sawood12

Bret, what's involved in the cryo-treating? It is something i've only recently heard of but know nothing about and am interested in how it works.

Cheers.

333pg333

Frozen rotors yes?

anders44

a lightweight 2 piece floating rotor is a lot better for racing then regular ones.

remember than 993TT is an OLD design 2 piece caliper and piston size is off when it comes to our cars really. imho its big, heavy and 32mm rotors aren't really needed for light car.

if the slowass guys at german autodismantlers ever ships my caliper, my 996 monoblock 944 we be ready.. so far 6months to ship 2 calipers.. impressive! always excuses *shrugs*

crossdrilled are **** for racing imho as they tend to clog up and vibrate, non porsche oem/drilled can also crack if the rotors are crap.

tjbreen

anders44:

I am looking at big brake options for my '87 944T but could not find commercially available adapters to anything but Big Blacks/Reds. How are you adapting 996 monoblocks and are they the Turbo calipers? Which rotor works or does it take a two piece with a custom hat?

A garage with a guy that has '04 GT3 with drilled factory rotors. If you look closely, you can see spider cracks in the rotors at almost any time.

anders44

a buddy is a cnc operator, another buddy is an engineer for a company makeing parts for offshore oil stuff.. comes in handy when drawing stuff/makeing stuff. a caliper adapter really is a simple thing.

996 = 28mm rotor
996T = 32mm rotor

I bought regular 996 calipers, oem they use 318x28, I will use 330x28 though. no need for the 996T calipers and a massive 32mm, unsprung weight is something you really dont want, same with to large rotating mass out from center.

the 330x28 is the rear disc of a 996 cup car if you look at performance frictions catalog, hub will be custom as well ofcourse, should take weight down.

I'll have the stuff done but the damn guys just keep makeing excuses, I'm guessing I've lost the money and will have to try again somewhere else.

as for cracks on oem porsche rotors it's normal for drilled disks