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Brakes . What fits what
Posted: Fri Feb 22, 2008 10:24 am
by haasad
My 75 911S has the alloy ATE front calipers and iron rears as a 911RS. They need refurb. BUT last night I was given a set of four porsche brembo four pot calipers suspected to have come fron a 930 turbo. .
So the mounting bolt pitch doesn't match but I can easily fix that. Question is will I encounter problems with disc thicknessor offset and wheel clearance on 15 inch wheels. ?
I'll post some pictures of them later if it helps but some (basic) measurement last night seems to indicate that the major dimensions aren't far off.
Any advice or opinion?
andy
Posted: Fri Feb 22, 2008 10:35 am
by Lightweight_911
Andy - Bill Verburg's invaluable resource for 911 brake info:
http://www.pelicanparts.com/MotorCity/wmv/brakes.htm
Posted: Fri Feb 22, 2008 12:50 pm
by Ian Gunney
I had to change the front hubs too.
Brakes
Posted: Sat Feb 23, 2008 8:53 am
by haasad
Heres a few pictures . I would really like to confirm what the calipers are off since that is key to identifying suitable rotors etc.
cheers
andy
Posted: Sat Feb 23, 2008 9:07 am
by hot66
do they have any numbers on them?
They look awfully like the 944 turbo callipers I fitted to my VW beetle
Posted: Sat Feb 23, 2008 9:11 am
by Alan @ CanfordClassics
They could be 964 C4 calipers I may have some rotors if so.
.
Calipers
Posted: Sat Feb 23, 2008 10:48 am
by haasad
Alan, yes thats a possibility I might have to have alook at those rotors. But a 944 is also possible. Trouble was they came in a job lot of "handy stuff" a race car builder friend bought about eight years ago.
I'll look for numbers?
andy
Posted: Sat Feb 23, 2008 10:54 am
by Lightweight_911
What diameter are the front/rear pistons ?
Calipers
Posted: Sun Feb 24, 2008 3:31 pm
by haasad
Just had a vernier on them and a magnifying glass.
Rears
4 piston 30mm and 28mm diameter
Fronts
4 piston 40mm and 36 mm diameter
Rears are numbered
20.4672.00
20.4673.00
Fronts
20.4691.00
20.4692.00
what do you reckon. 964/944 or 928. I'm convinced they'll go under 6 by 15's.
andy
Posted: Sun Feb 24, 2008 8:11 pm
by Ian Gunney
the 930 discs and calipers just go inside 7 and 8 by 15 Fuchs - mind you there is no room for the wheel weight inside the rims
Brakes
Posted: Mon Feb 25, 2008 8:27 am
by haasad
So Ian,
do these look like 930 calipers? I really want to use them but need to identify so I can select the correct rotor option.
andy
Re: Brakes
Posted: Mon Feb 25, 2008 11:45 am
by mrg3.6
haasad wrote: do these look like 930 calipers?
Andy,
These are definately NOT 930 calipers.
Martin
911SC 3.6
Brakes
Posted: Mon Feb 25, 2008 1:28 pm
by haasad
993 maybe?
andy
Posted: Mon Feb 25, 2008 2:01 pm
by hot66
this site might be of interest :
http://www.944s2.com/brakes/brakes.htm
Also for reference :
928's on ebay .... different part number to yours so I think you could assume you don;t have 928's:
http://cgi.ebay.co.uk/BRAKE-CALIPERS-PO ... dZViewItem
Posted: Mon Feb 25, 2008 4:48 pm
by MdR
hot66 wrote:They look awfully like the 944 turbo callipers I fitted to my VW beetle
I vote with James - they look like early 944 brembos.
The early ones had the raised cast lettering, the later ones are smooth with the lettering as a stencil/paint.