A couple questions about a 993 Brake conversion

[SoCalGL]

okay awesome,

see i have info on doing a 944 upgrade but not the 993, so pretty much same as a 944 but you use 3 mm spacers correct?

[Mikey]

Straight from VdubEngineering's site...

Incidentally, you can also use 993 rear brakes on the same early (85.5 and earlier) backing plate/caliper mount. The caliper will require a shim of about 3mm to centre it over the rotor.

Yes. If you use the 993 Rear calipers and rotors. You'll need the 3mm spacer.

[Pillow]

Just out of curiosity, could you run the 944 N/A rotor and straight bolt up the 993 caliper to it?

... Might be a stupid question, but might avoid needing the spacer?

[Mikey]

Originally Posted by Pillow

Just out of curiosity, could you run the 944 N/A rotor and straight bolt up the 993 caliper to it?

... Might be a stupid question, but might avoid needing the spacer?

The 993 rear calipers are 290mm x 24mm.

As quoted from Vdubengineering's site, "Early NA (83-85). ...with a ventilated disk (290mmx20.4mm)."
"Early turbo's ( 85.5? and 86) ...the rotor is ventilated and measures 299mmx24mm."

Here are some numbers for you. The early 944 n/a's are too narrow. and the turbo's are too tall. I found the measurement for the 993's in another post.

There are never stupid questions. I'm glad to help where I can, it's a good question. Took me about 5-10 minutes and a little site searching to find the numbers. I didn't know till you asked.

SoCalGL, I didn't even catch the first time you asked about a master cylinder. Personaly, I was going to try a stock master cylinder, then go from there.

[SoCalGL]

see my plan is to run 993's on all four corners, my first idea was to run 993 turbo's but I felt I would be over doing it immensely also this is somewhat of a budget project with an average of 3 to 500 hundred every two weeks and I still have alot to do and 800 dollar calipers just seem ridiculous. Anyways when finding Sandeep's tech article on 993 turbo conversion I e-mailed him asking about his brake set up and he told me he runs a dual m/c set up with a bias bar made by tilton brakes so I was wondering if such an exstensive system would still be nessacary.

[Pillow]

Good info Mikey! I was just trying to think out of the box

[Mikey]

That's cool Pillow, I didn't think of it till you asked.

Here's a quote by lanner I found on another thread, I think it should be tied to this one.

Originally Posted by flat

I'm a little late in this conversation, but...

All 944T rear calipers are the same. The 993 rears are alittle prettier (smooth font), but they are the same as far as piston sizes and mounting ears etc..

Chris, try getting your hands on a boxster frontrotor, and then use that caliper you have in the front. I was mocking up up a similar setup, and I think it would work very well. On paper, it's about 12% more brake torque that a karmann ghia setup, with only 5% or so more fluid requirement. So it would work well with the stock master cylinder. Since the P-car caliper is stiffer than vw parts, the increase in brake performance will probably be more than what the numers show (ie 12%). And ofcourse you have a vented rotor with greater heat capacity and dissapation. Also, since it's a 24mm rotor, you save alot of weigh when compared to a 28mm setup...personally I think most that for most guys, the big-brake setups with 28mm and thicker rotors on a bug are a waste...they weigh a ton. (opps..there goes my business out the door......)

Lanner

Easy,
Lanner