slownrusty

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

schnele

Nice work Yasin. Now have a Carib !

jimculp

Nice upgrade. Did you get fade w/ the stock rotors at the track?

sand_man

As usual, 'Rusty...you da man! Great work!

And for the record, Carib is one of my all time favorite beers!!!! It's hard to find here in NC, so now I gots the shakes and I'm drooling!

69gaugeman

Take the old pad's connector and cut off the end leaving 25 - 50 mm of wire (1-2 "). Then solder the wire together and plug it into the wiring harness and tie it up. The system works on a complete circuit that gets cut when the pad wears the connection and causes it to be open.

SGOGT4

What prompted this modification?

How has the brake biased been effected with the change to the front but no change to the rear?

slownrusty

Thanks for the comments and feedback guys. When I was wrapping up last night, I actually thought about spade connecting the two wires together for the sensor which means I could re-use them later if need be.

My best - Yasin

nathanUK '81 930 G50

Yasin, you could fit the front calipers to the rear.

Try not to rush any work in the future.

What paint did you use? All my calipers could do with smartening up on both my P cars.

69gaugeman

Use the connectors off the old pads and it will keep everything sealed and clean.

911rudy

Slownrusty how did you paint the calipers and get the lettering to look so good?

slownrusty

I luckily have a surgeon's hand..so painting the lettering by hand was not so bad.

I used 800F VHT high temp paint.

Yasin

cobalt

The rotors are actually considered 322mm not 321 no biggie also the factory pads have provisions for the wear sensors. What pads are you using?

slownrusty

As clearly mentioned in my first post, I am using EBC Red pads. The wear sensors on the 993 pads must be comptely different to the 930, how do they attach to the pad?

Yasin

Cajun

Here's a question: When people say that they are upgrading their 930 with the big brake kit, do you upgrade just the fronts or both the front & rear? I was pricing the kit in Performance this morning and I was wondering what the answer to this question was...

911rudy

A lot of people put big reds on the front and move their old 930 fronts to the rear.