booster delete kit

Need technical Q/A then you're in the right place

Moderator: martauto

Post Reply
User avatar
8565
E30 Zone Newbie
E30 Zone Newbie
Posts: 96
Joined: Tue May 28, 2013 11:00 pm

Mon Mar 19, 2018 9:29 am

anybody out there fit a booster delete kit on their e30? is this kit good on daily drive?
User avatar
Brianmoooore
E30 Zone Team Member
E30 Zone Team Member
Posts: 49358
Joined: Mon Jan 10, 2005 11:00 pm

Mon Mar 19, 2018 1:04 pm

What is a booster, and why would you want to delete it?
Cloggy Saint
Old Skooler
Old Skooler
Posts: 8024
Joined: Sun Jan 09, 2005 11:00 pm
Location: zummerzet

Mon Mar 19, 2018 1:08 pm

Brake booster? :?
Image

E30 zone - promoting adult illiteracy since 2004
User avatar
aimlessrock
E30 Zone Squatter
E30 Zone Squatter
Posts: 1821
Joined: Sun Dec 06, 2009 11:00 pm
Location: Manchester

Mon Mar 19, 2018 2:00 pm

i have seen folk move them for conversions and relocate them etc- deleting one is a first for me.
E30 320i Convertible (1989)
190 Mercedes (1988)

"there is nothing more expensive than a cheap E30"
User avatar
Satan
Old Skooler
Old Skooler
Posts: 2489
Joined: Thu Nov 16, 2017 11:00 pm
Location: Formally SexyLady and Diable

Mon Mar 19, 2018 2:00 pm

Drive the car on a private road up to speed kill the engine (don't apply the steering lock) as then you will then lose all vacuum to the booster then see how the brakes feel.
User avatar
Gavt
E30 Zone Newbie
E30 Zone Newbie
Posts: 153
Joined: Wed Apr 10, 2013 11:00 pm

Mon Mar 19, 2018 3:56 pm

Iv driven a mk 1 golf with a brake pedal bias box and has one master cylinder for front and one for rear this doesn't use a servo / booster and isn't quite as bad as just turning off engine for no servo assistance. But it isn't as good as servo and should only be done if no other method can be used. It gets the job done but sometimes feels like it isn't going to as your stood on the pedal hoping ing to stop. Best avoided for a dd
User avatar
reggid
E30 Zone Squatter
E30 Zone Squatter
Posts: 1981
Joined: Mon Jul 11, 2005 11:00 pm
Location: Oz

Tue Mar 20, 2018 9:37 am

Satan wrote:Drive the car on a private road up to speed kill the engine (don't apply the steering lock) as then you will then lose all vacuum to the booster then see how the brakes feel.
it isn't as bad as that, you can do booster delete but usually things are change to compensate somewhat. still wont have same feel as assisted though
E30 325is with M20B31
User avatar
Supafly
E30 Zone Regular
E30 Zone Regular
Posts: 559
Joined: Wed Feb 22, 2006 11:00 pm

Tue Mar 20, 2018 9:16 pm

To remove the servo assistance and still have reasonable effort for braking you will also need to change the master cylinder size which will 'increase the stroke of the pedal' (might have that backwards).

There are plenty of online calculators to learn about this and work it out. A complication for e30's is that the master cylinder has a stepped bore so the cylinder size is already different for the front and rear. A one size fit's all solution won't work unless you change other components. It's very easy to mess up the braking and fairly complicated to get it right.

Why are you considering the booster/servo delete? There are other tried and tested approaches to making more space in the engine bay.
User avatar
reggid
E30 Zone Squatter
E30 Zone Squatter
Posts: 1981
Joined: Mon Jul 11, 2005 11:00 pm
Location: Oz

Wed Mar 21, 2018 9:53 am

id go for something like this. works on RHD to


https://www.facebook.com/pg/Massive-Bra ... 8501886942
E30 325is with M20B31
Post Reply