AC MKIV Brake rotors

mk1atigerbill · #1 (**permalink**) 01-10-2009, 09:16 PM

I have a 1984 AC MKIV with 733 BMW calipers. The front rotors are 11.5" in diameter, 7/8 thick and ventilated, 6 pin threaded to hubs, 1/2 inch tophat, 1" bottom offset. They're not Beemers. Anyone have an idea what they might be? No numbers are stamped.

Thanks,
Bill

JBo · #2 (**permalink**) 01-11-2009, 04:23 AM

Bill, I'll put in a call to MKIV, he has a wealth of knowledge on these cars. I'd like to know for future reference as well.

computerworks · #3 (**permalink**) 01-11-2009, 06:08 AM

mod note - moved to All Cobra Talk

Mark IV · #4 (**permalink**) 01-11-2009, 07:50 AM

Steve Gray at Brooklands has the rotors. They are based upon production units, but are modified. Steve has had a new batch cast and machined.

www.brooklandsmotorcompany.co.uk

dkp_cobra · #5 (**permalink**) 06-21-2010, 12:53 AM

Hi,

I am new here and I can tell you something about these rotors. Although the calipers are standard BMW (front), the rotors are speciall made for AC resp. Autokraft in the 80th. I don't know whether Steve still has some rotors but Gerry has made some new last year or the year before.

Regards,

Peter

TRENT312 · #6 (**permalink**) 04-14-2011, 04:44 AM

how bout the front brake hoses. they have Girling written on them but can't read any kind of numbers off of them

PANAVIA · #7 (**permalink**) 04-22-2011, 10:58 AM

we matched the threads and used steel braided lines. --

ANF289 · #8 (**permalink**) 04-25-2011, 05:12 AM

Mk IV Brake Info:

Vented Brake Disc Rotor: AC - Front rotors are 11.5" in diameter, 7/8 thick and ventilated, 6 pin threaded to hubs, 1/2 inch tophat, 1" bottom offset. Steve Gray at Brooklands has the rotors. They are based upon production units, but are modified. Brooklands Motor Company Front Page

Front Brake Calipers: BMW E23, Model 735 Years: 03.77 - 07.86 ATE # 13.0460-9031.2; trade #’s 20437 & 609031

Front Brake Pads: BMW 7 Series 1976-86 ATE - 13.0460-9031.2 Brake Pad Set, disc brake. Width:89.9 mm, Height:70.5 mm, thickness/strength:19 mm, wear indicator prepared, ATE

Rear Brake Caliper: Peugeot 505 (early 80's station wagon) Peugeot 504/505 part #’s-- 4400.11 and 4400.12
Girling part #’s– 64033853 and 64033854 They are Girling AH12 MK3 types– TRW/Lucas part #’s– BCT 125 and BCT 126
BECK/ARNLEY Part # 0770640S. Beck Arnley part number for the right rear Peugeot caliper (for the left side of the Mk IV)

Rear Brake Caliper Repair Kits: Peugeot part # 4449.15 Some AKL cars used AP brakes. Lucas part # SP 2582

Brake Booster Servo: Ford Sierra MK1/MK2 Brake Booster Servo ‘Girling’ 1982 - 15/2/1993, Ford part # 6195975 Brake booster info– email Bob Green at BG Developments - manufacturers and suppliers of competition and high performance braking systems for over 30 years (New G/Ford booster)

Brake master cylinder: ( 2 versions-7/8"or 13/16" bore) ** 1972-76 MKI Ford Granada Girling part # G 64679152Q123 X, original Girling part # 64066627, new reference # PMH117 **part # stamped on the brake master cylinder

Shotaro · #9 (**permalink**) 12-07-2020, 12:42 AM

I have an autokraft cobra. I'm looking for a master cylinder. Brake Booster Servo: Ford Sierra MK1 / MK2 Brake Booster Servo'Girling' 1982 --15/2/1993, Ford part # 6195975 Brake booster info– email Bob Green at BG Developments --makers and suppliers of competition And high performance braking systems for over 30 years (New G / Ford booster). Please tell me who knows.