Current thinking on better brakes for 1973 T?
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smallspeed
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Re: Current thinking on better brakes for 1973 T?
If you need dimensions from a boxster / cayman s caliper let me know - I have two going on one of my cars. They’re big though - I’m shaving 12mm off the mounting faces and using them with a 325mm disc and they’ll only just fit inside a 17” wheel
Obviously Porsche disc and wheel offsets are different to bmw but figured it would be close enough to be relevant.. as standard (ie no mods to calipers) i can use them with CSL discs (360mm I think) but they would need 18” wheels and the discs are double the price
Obviously Porsche disc and wheel offsets are different to bmw but figured it would be close enough to be relevant.. as standard (ie no mods to calipers) i can use them with CSL discs (360mm I think) but they would need 18” wheels and the discs are double the price
- KS
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Re: Current thinking on better brakes for 1973 T?
I did but you don't need to as Chris designed the calipers so the pistons have the same combined surface area as a stock single piston - by using six pistons, you can run far bigger pads, with much greater friction area (from an Aston Martin of some sort, from what I remember). I used a 22mm m/c but the pedal was a bit wooden. 19mm would have been fine.911hillclimber wrote:Again, thank you all.
Keith, did you use a larger m/c to move those Pistons?
My wheels are Dage Sport 15" wheels.
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Gary71
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Re: Current thinking on better brakes for 1973 T?
You could spend for ever swapping parts and still not fully achieve ‘improved stopping for the same effort’911hillclimber wrote:Always need better brakes for my 73T which is modified.
By 'better' I mean improved stopping for the same pedal effort.
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Options seem to be to fit the servo off the 3.2, I have some of the parts. The engine is a 3.2 so I have the servo take off
A servo gives you just that. You could do a remote mount so as not to need to go cutting the car up to fit the later servo bracket.
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911hillclimber
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Re: Current thinking on better brakes for 1973 T?
I started this all off in my mind a long time ago and with a servo in mind.
There is a dual circuit system used in kit cars etc that might sneak under the smuggler's box lid and miss my toes. I think it is a 7" servo dia so about the right boost without them getting all 'over-servo'd' like my Skoda is.
The Boxster feel is perfect...
As I say, need to do some serious google time to see what is best, simplest, and economical.
The car's system works just in modern traffic you can be caught a bit short (and driver lack of concentration)
£340 inc vat, dual system. They give no dimensions (
) but will ask. A few pipes, a few brackets and a custom cover up front, a long servo vac hose from the engine down the tunnel and a good bleed. And local to me!
Tempting.....and a bit of interesting DIY over winter after the paint job.

There is a dual circuit system used in kit cars etc that might sneak under the smuggler's box lid and miss my toes. I think it is a 7" servo dia so about the right boost without them getting all 'over-servo'd' like my Skoda is.
The Boxster feel is perfect...
As I say, need to do some serious google time to see what is best, simplest, and economical.
The car's system works just in modern traffic you can be caught a bit short (and driver lack of concentration)
£340 inc vat, dual system. They give no dimensions (
Tempting.....and a bit of interesting DIY over winter after the paint job.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
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Gary71
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Re: Current thinking on better brakes for 1973 T?
Looks like what I was thinking!
Your description of ‘performance’ is about immediate response, not ultimate power or fade resistance.
A servo will give you that, maybe also with a larger master cylinder to reduce pedal travel?
Your description of ‘performance’ is about immediate response, not ultimate power or fade resistance.
A servo will give you that, maybe also with a larger master cylinder to reduce pedal travel?
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911hillclimber
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Re: Current thinking on better brakes for 1973 T?
Bang-on Gary, just want lazier road manners as I grow older, hence the reference to the Boxster which has great road manners obviously.
I just might squeeze it under the smugglers lid and avoid the pedals hitting it, esp when bleeding the brakes (max pedal travel).
Supplier is only in the north Cotswolds, driven past them many times, so will drop in with the car and see if they will allow me an installation 'test'.
The unit is made in Spain by a brake component manufacturer, not sure who though, but not China.
I think this will fit the bill easier than caliper swopping and be a bit more interesting for me to do.
I just might squeeze it under the smugglers lid and avoid the pedals hitting it, esp when bleeding the brakes (max pedal travel).
Supplier is only in the north Cotswolds, driven past them many times, so will drop in with the car and see if they will allow me an installation 'test'.
The unit is made in Spain by a brake component manufacturer, not sure who though, but not China.
I think this will fit the bill easier than caliper swopping and be a bit more interesting for me to do.
73T 911 Coupe, road/hillclimber 3.2L
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9
Lola t 492 / 3.2 hillclimb racer
Boxster 987 Gen II 2.9

