7 Series 25mm Brake Master Cylinder

[ScottEgg]

Where can I get one!?! Am struggling to find this larger master cylinder which I think was originally destined for 750i's. I would like second hand but will get brand new if need be, just can't find any!

[Alex]

try eurocarparts or GSF car parts for a new one

[doggydoo2000]

please PM me if you find a source scott

[Alex]

had a look on ECP and they do one for a 750i @ £147

part no 132110190

not sure if its the one you want

would copy and paste the link but it does not work properly if you do that on ECP

[Dave_M3]

I think Greenblood on E30owners (Might have the same username on here) got one from somewhere in the US for a fraction of the price for his sport last year.

[jaistanley]

If you can flare brake pipe, use an Audi one instead.. I'm 80% sure they fit straight on. I'm using one with a golf servo for my S50 conversion.

[Andy335Touring]

E28 535 one fits too, smaller bore than the 750 M/C(24mm[ish] V's 25mm[ish]) still a big improvment on the standard one

[oliwally]

why do you need to change M/C,apart from the physical size on engine swaps?
a bigger M/C bore gives you a harder pedal,a smaller bore gives you high pressure at the calipers
and a softer pedal.

[gareth]

generally they're used to firm up the pedal if larger bore calipers or 4 pots are fitted

[Andy335Touring]

it's generally for folks who do a big brake conversions, with the standard M/C there's too much pedal travel(depending which calipers you use)

[gareth]

too slow

[Andy335Touring]

[gareth]

[ScottEgg]

The E28 535 master cylinder is half the cost of a 750 job so I reckon thats the one I'm going for. The car is used for track days but currently runs standard calipers however should I wish to upgrade the bigger mc would be needed. The travel on the pendal at the mo is too much hence the 'upgrade' now.

[freynolds]

The E28 535 master cylinder is half the cost of a 750 job so I reckon thats the one I'm going for. The car is used for track days but currently runs standard calipers however should I wish to upgrade the bigger mc would be needed. The travel on the pendal at the mo is too much hence the 'upgrade' now.

I'm looking at getting the E28 535i MC at the moment. GSF are offering a very good price
Do you know what the difference is between an ABS model and a non-ABS model? They seem to have different ATE part numbers, but I can't think of what differences would be necessary. The bore diameter is the same...
Also, can you confirm that the E28 535i MC is a direct fit for an E30 325?

Cheers

[Jhonno]

number of outputs..

[ScottEgg]

Freynolds, I don't know the difference between the ABS and non-ABS but the master cylinder for mine (abs) was a direct swap.

[gcs325i]

If you can flare brake pipe, use an Audi one instead.. I'm 80% sure they fit straight on. I'm using one with a golf servo for my S50 conversion.

What Audi is it off of?