Brett928S2

Hi All

I need a little help please

I need a new master cylinder and looking at the PET (6)...I cannot figure out which of 2 numbers is correct...

My car is a UK ...S2 (310 hp) and 16 valve 1986...Right hand drive

Part numbers are ...

Either..... 928 355 011 24

Or ........ 928 355 011 23

Any help appreciated....I will be buying from 928 International I think at $249 ....as in the UK ,,,they want $587 (In British Pounds)

Unbelieveable difference ...

All the best Brett

daveo90s4

Brett, from my limited experience I have found that differences in the last two digits only signify an updated / improved part - the lower number having been superseded and the higher number being the supersession. - has been the case for power steering hoses and for some other parts too. But I'm not sure if this applies universally.

Hopefully others can chime in with a more definitive view.

daveo90s4

Brett, I've just had a look on PET5.

PN 928 355 011 23 is up to "92GS8 60999" (chassis no. presumably)
PN 928 355 011 24 is as from "92GS8 61000"

so would appear to be a supercession issue.

I note the last two digits for the servo (vacuum booster) changed at the same point as too did the brake pressure regulator. Where it is only the last two digits that have changed, parts may well be interchangeable??

But for what you're planning, won't you need a couple of brake boosters?? :-)

Cheers

sharkmeister85

Isn't that the break between '86 and '86.5 models? Did that break exist for ROW cars or is it only in NA? If you're ordering from 928 Int'l., I'm sure they can tell you which is correct.
Glenn

Vilhuer

If change was done because of "S4" brakes, all '86 MY ROW's should use later part.

Jim bailey - 928 International

Porsche used up their left over 1985 parts to build the first 1000 USA spec 1986 cars is perhaps the best way to think of the 1986-1986 1/2 split. Remember the national speed limit was 55 mph ! Just a couple years earlier ALL speedometers only went to 85 MPH ....so who needed brakes !

sharkmeister85

So the "split" is only on USA spec cars and not ROW?
Glenn

Jim bailey - 928 International

Correct the European market got performace upgrades BEFORE the USA like ABS then in 86 what we call"S-4 brakes" which are really 1986 Euro brakes