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Join Date: May 2005
Location: Houston
Posts: 3,862
Big Reds Upgrade - A "Slow'N'Rusty" Pictorial

Well Gang *finally* got my Big Reds upgraded in the front *only* with new 993TT rotors. This is a project I pieced together and took much longer than I thought it would, due to the fact that some idiot before me (who worked on the car prior to my ownership) had rounded off the inner portion of the 10mm Hex bolt on one of the calipers and I had weld the socket to the bolt. Then tightening \ torquing the aluminum hat to the 993 TT rotor, I was rushing and the torque wrench slipped and I had to be rushed to hospital and got 5stitches on my pinky finger, from slicing it open against the sharp edge of the new rotor (out of comission for 2 weekends on that stupid error!), also chipped the bone too on the joint...nice one!

I also completely refinished and repainted the 993 calipers with high temp paint and painted the "PORSCHE" logo as well, so more time there. A week there or so.

I also had custom "DOT" front stainless braided brake lines made for me for the front (that took another week).
In the rear I installed a set of DOT rear braided steel lines I bought from Pelican. At the same time I installed new Zimmerman rotors and shoes for the e-brake and PBR Axxis pads in the rear. In the front I am using EBC Red Stuff pads.

With my 17" HRE wheels I could easily run a 335mm rotor in diameter. The 993 TT rotors I am running are 321mm in diameter versus 303mm for the stock 930 rotors. The 993TT rotors are also thicker have a better vain design for cooling and have a much larger pad contact area. They also only 2.5lbs heavier than the stock 930rotor (16.5lbs vs 14lbs).

Ok enough blabbing...here are the pics...

993 TT Calipers when I first bought them (came off a race car):


After I refinished them:


993 TT Rotor left vs 930 Stock Rotor:




Differences in diameter and weight respectively:
993 TT Rotor:


Stock 930 Rotor:


Differences in pad respectively, the 993 TT pads have a much larger surface area and do not have the wear indicators like the 930 pads, so my dash on my light is now always "on" (might have to pull the bulb)


Stock 930 brakes, still impressive:


But these are the "daddy":


I finished everything tonight at 9pm after 2+ hours of bleeding!! Thought it would never end and buttoned everything up, and took the car for a much deserved drive, the pedal feels excellent, but I will re-bleed on Staurday as I still feel there might be a few straggler bubbles in the system. I am running ATE Blue brake fluid. If you guys want better daylight pics and some pics of the custom front braided lines please let me know and I will snap a few.

Total cost of the entire project:
1) Big Red 993 TT Calipers with 930 caliper \ hub mounts - bought used
2) 993 TT rotors & aluminum hats - bought used not many miles on them
3) New 993 TT EBC "Red" pads
4) New Zimmerman rear calipers
5) New Rear Axxis PBR pads
6) New Rear brake shoes
7) New Front and Rear DOT approved braided steel brake lines
8) ATE Brake Fluid
Total: $1970

Best Regards - Yasin
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Ole Skool - wouldn't have it any other way
Old 08-21-2007, 08:15 PM
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dewolf's Avatar
 
Join Date: Jan 2007
Location: Australia
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Where the pad wear indicators plug into the wiring harness, I cut it off and spade connected the two wires together so that later, if need be, I could re-connect the wear indicators. No more dash lite.
Old 08-21-2007, 08:38 PM
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Me like track days
 
Craig 930 RS's Avatar
 
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Location: Kirkland, WA
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How's the brake bias feel under hard braking?
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 08-22-2007, 01:29 PM
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The bed in procedure for those EBC red pads are "normal" driving for up to 1,000miles, so to answer your question Craig, I have not done any heavy braking to reserch the bias. So far from my brief 30mile drive lastnight, the brakes feel much better than the stock brakes that were on the car, by this I mean, absolutely stout pedal feel and very good braking performance thus far.

So the sad truth is that it could take 2years before I drive the 1,000miles in this car, so I'll check back in 2009 or 2010.


Regards - Yasin
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Ole Skool - wouldn't have it any other way
Old 08-22-2007, 03:05 PM
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Quote:
Originally Posted by slow&rusty View Post
So the sad truth is that it could take 2years before I drive the 1,000miles in this car, so I'll check back in 2009 or 2010.

Sounds like you need to do a road trip!
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John A.
1979 Porsche 930: 3.4L, SC cams, Twin plug, Leask WUR, Custom SSI turbo exhaust, Tial WG, K27HFS, and we can't forget the Zork (short lived depending on my homeowners assoc.)
05 Boxster S: For the Track.
06 Dodge Ram 2500 Power Wagon: Tow Vehicle
Old 08-22-2007, 07:16 PM
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Me like track days
 
Craig 930 RS's Avatar
 
Join Date: Sep 2003
Location: Kirkland, WA
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Good grief, the 1,000 mile requirement for a brake pad is ridiculous.

Typically pads need this, albeit at the track I presume:

3-4 stops with light to medium brake pressure from approximately 90 to 65
300 to 400 yards between stops

One stop with medium to heavy brake pressure without allowing the brakes to lock from 110 MPH to 65 MPH. Recovery stops with light brake pressure 2-3 times. Repeat the high speed stops, including recovery stops, 1-2 times.
Allow a cooling-off distance of approximately 500 m (500 yards) between high speed stops.
-------
At any rate, you now will have a heavy front bias - just be aware of that -
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- Craig 3.4L, SC heads, 964 cams, B&B headers, K27 HF ZC turbo, Ruf IC. WUR & RPM switch, IA fuel head, Zork, G50/50 5 speed. 438 RWHP / 413 RWTQ -
"930 is the wild slut you sleep with who tries to kill you every time you "get it on" - Quote by Gabe
Movie: 930 on the dyno
Old 08-23-2007, 06:44 AM
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On the track (assuming you track) or in a very high speed hard stop I would be willing to bet that you are going to lock those fronts up in the blink of an eye.
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Rob Montgomery
'88 Blk/Blk 930 ('Lucy') - Not Stock & Not Running
Old 08-23-2007, 07:37 AM
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