Caliper piston sizes Box, Box S & 944s2??

[iguana]

Just trying to sort some caliper sizes out, anyone know piston sizes for 2.5 Box, Box S & 992S2 fronts?

Thanking you

[andrew s2]

you'll find this on

www.titanic

[Tool Pants]

For the base Boxster and S. 40 and 36 mm for the front, and 30 and 28 mm for the rear. Jeff

[AndyS2]

Try this for the 944S2 brakes :-

www.944s2.com

There is a very detailed section on brakes.

Edited to say I've just noticed you put 992S2 not 944S2, oh well it is early!!

P.S. whats a 992?

>> Edited by AndyS2 on Wednesday 18th February 08:01

[neon_fox]

I thought that the base boxster used smaller calipers and the S used the 996 calipers?

This based on part# from Pelican, boxster front left caliper Z-351-421-03 $321.25, boxster S from left caliper T-351-425-11 $503.00
Also part no.s for pads are different for box/boxS but the same for BoxS and 996C2...

Also I believe front disc diameters for Big Reds are 322mm, and BoxS/996 are 318mm front/299mm rear

Box 2.5 discs 298x28mm front/292x24mm rear.

Edited: Have found a page listing the pad areas and disc sizes of a wide variety of porsches here:
www.rennsportsystems.com/2c.html

Fox
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>> Edited by neon_fox on Wednesday 18th February 11:22

[Tool Pants]

The difference between calipers have nothing to do with the piston size, just like it has nothing to do with the master cylinder size. My numbers come from the Porsche factory shop manual for the Boxster.

[neon_fox]

Tool Pants said:

The difference between calipers have nothing to do with the piston size, just like it has nothing to do with the master cylinder size. My numbers come from the Porsche factory shop manual for the Boxster.

Perhaps the question should be what is the pad surface area for the various calipers then?

Fox
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[Tool Pants]

Those numbers are in the Boxster shop manual, but I forgot my school math.

For example, the base Boxster front. 216cm and then there is a 2 just above and to the right of the cm.

[pjs917]

944s2 front's are the same as the 964, except that the Porsche script is painted on the 964, and cast on the 944s2, ultimate weight saving, or cost cutting?