25mm Brake master cylinder

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M52
E30 Zone Newbie
E30 Zone Newbie
Posts: 1
Joined: Sat Nov 17, 2018 11:40 am

Post Thu Dec 27, 2018 8:45 pm

Hi All!

Has anyone on here changed over to a larger 25mm master cylinder? If so which one are you using?

Ta!
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paultv
E30 Zone Squatter
E30 Zone Squatter
Posts: 1545
Joined: Mon Apr 21, 2014 11:00 pm
Location: Auf dem Schnee: Germany

Post Sat Dec 29, 2018 9:43 am

I think you'll find the 750i E32 25mm MC is for an ABS system, so it only has front and rear out to the ABS unit which then has 3 outputs, LR front and a common rear output.

Word is you add a T piece to split the fronts on a non ABS set up.

This will give you a firmer pedal - but lower your braking power for the same input "push" - depends how strong your leg is! all because of the reduced mechanical advantage of the original 19mm or 22mm bore
on the stock MC.

Paul :-)
4th May 1990 325i Convertible.

BMW E30 Cabriolet Best Mod Ever:

https://bmwe30cabriolet-wdm.blogspot.com/