Brake booster + Mater cylinder upgrade Question

**Limbo** · 28-06-2007 03:27 PM

Hi guys noted that alot of guys upgraded their civic brake boosters & master brake cylinder with ITR brake boosters & master brake cylinder.

I've been told that it is possible to use Prelude brake boosters & master brake cylinder also as an upgrade, can anyone confirm?

ALso would my ek4 be able to use a BB4 Prelude brake booster & master brake cylinder or do i need a different one?

**ECU-MAN** · 28-06-2007 05:31 PM

the master cylinder you retrofit must be an abs master cylinder, prefibly from the same type of abs

BB4 is ABSII EK4 is ABSIII ( low pressure )

**fatboyz39** · 28-06-2007 09:16 PM

We use prelude master cylinder and booster. Try using the bb6 ones, there the same size as ITR.

One of the best mods to be done for the brakes.

**Limbo** · 28-06-2007 10:20 PM

cool thanks i was thinking that it was one of the prelude ones that worked.

ECU-Man can you confirm that the bb6 one is also ABSIII also?

**ECU-MAN** · 28-06-2007 10:57 PM

yes BB6 has the same type low pressure ABS system as the EK, EM, EJ ect

**barefootbonzai** · 29-06-2007 10:00 AM

you drive an ek4 right? the brake booster & master cylinder is already up to spec, there's no need to change it.

**Zdster** · 29-06-2007 11:06 AM

Originally Posted by barefootbonzai

you drive an ek4 right? the brake booster & master cylinder is already up to spec, there's no need to change it.

What are they, 15/16th's?

**fatboyz39** · 29-06-2007 06:41 PM

Originally Posted by barefootbonzai

you drive an ek4 right? the brake booster & master cylinder is already up to spec, there's no need to change it.

Fitting a larger one won't hurt

. We just fitted a prelude brake booster/ master cylinder into a EJ8 coupe (same size booster/master cylinder as ek4) and there was a big increase in braking capacity.

**CTR Coupe** · 29-06-2007 07:06 PM

kinda a noobie question but why does this increase breaking?

wouldn't this just shorten the distance you can push the pedal rather than actually increasing the breaking ability of the car?
ie the car is still going to travel x distance to stop with or without this mod?

I would think you would only "need" this upgrade if you needed to move larger/more brake pistons or upgrading to rear disks (for cars fitted with drums).

I just can't get how the concept of moving more fluid decreases stopping distance.

**barefootbonzai** · 29-06-2007 08:13 PM

Originally Posted by fatboyz39

Fitting a larger one won't hurt

. We just fitted a prelude brake booster/ master cylinder into a EJ8 coupe (same size booster/master cylinder as ek4) and there was a big increase in braking capacity.

in the case of the ek4, how would swaping in exactly the same items increase anything