Liberty brake booster/cylinder in L series

guyph_01 · Post by **guyph_01** » Fri Sep 25, 2009 1:29 am

Hi guys,

I want to install this liberty Brake booster/master cylinder unit on my L series. I would like to know if its a straight swap?
Would i need to block/ bend the oil lines?
How do i know what lines go where? to they all line up?
Would it be best to use the L booster and the Lib cylinder?
Or use the complete Lib unit?
What else can i expect to do when doing the swap?

My plan is to buy and install the crossbreed kit in the close futur. At the moment im replacing to a better/higher compression engine so i thought i'd change the booster also.

Awaiting your ideas, advice
thx
Guyph

rtcb65 · Post by **rtcb65** » Fri Sep 25, 2009 8:51 am

I personally would use a liberty booster and an impreza master . In the cross bred kit , as far as i know , comes 2 plugs that are used to block the unused out lets on the master. The impreza master has 4 out lets , you only have to use 2 , and i believe the 2 you use , line up with the 2 standard lines. Dont quote me on that . I may be thinking of the M.Y. As they are the ones i work with all the time.

guyph_01 · Post by **guyph_01** » Fri Sep 25, 2009 11:50 am

Cool thx, Any reason why you would use the Impreza Master?

Any more info on fitting the booster and the master lines??

So it would be better for me to wait and install all the kit at once?

thx

d_generate · Post by **d_generate** » Fri Sep 25, 2009 4:49 pm

Bummer, I just threw away 1 Liberty & 2 WRX brake boosters, you could have had one to try it out.

AndrewT · Post by **AndrewT** » Fri Sep 25, 2009 5:53 pm

Yeah both bits are a straight bolt-in swap. The lines just plug straight in (although they aren't "oil" lines, they are brake fluid lines).
Some Lib brake master cylinders have an extra outlet, no problem you can just get a screw-in bung from any brake place for like a buck.

rtcb65 · Post by **rtcb65** » Fri Sep 25, 2009 5:59 pm

guyph_01 wrote:Cool thx, Any reason why you would use the Impreza Master?

Any more info on fitting the booster and the master lines??

So it would be better for me to wait and install all the kit at once?

thx

The lib booster is fitting is in the thread i hope shows up at the end of this post.
showthread.php?t=14686

YouTube · Post by **El_Freddo** » Fri Sep 25, 2009 11:19 pm

guyph_01 wrote:So it would be better for me to wait and install all the kit at once?

That'd be my idea - less work in long run.

Also I've heard that the lib booster/master cylinder combo on stock L series brakes can cause some strange brake feel and sudden brake activation. Gee did this on his L and that's why he no longer has it...

Do the conversion in one hit, it'd be easier that way... You've got the disc/drum combo on your L yeah? how's that go with the EJ? I had some brake fade coming down Mt Hotham earlier this week, but there's nothing unusual about that. I've got the disc/disc setup from an RX turbo.

Cheers

Bennie

wrxer · Post by **wrxer** » Sat Sep 26, 2009 12:27 am

if you get caught with lines, i got a double flare tool to make new lines with. in kenwick too. pm if you need to borrow it. what about the residual line pressure valve? do subaru have these on drum brake cars and where are they located? will post seperately

guyph_01 · Post by **guyph_01** » Sat Sep 26, 2009 2:49 am

Yep sry i called them "oil" lines but you guys understood:)
Well if i drive the car carefully its ok. If i drive it hard, with hard breaking after a very short while i need to press very very hard on the brake pedal to slow down( i think thats what u called brake fade Bennie) Also if i get the car to about 110 and slam on the brakes, tyres does not lock, its just slows down and takes quite a bit of time to slow down to a stop. I rarely drive it on the road, i use a little charade as a daily, man that thing is cheap on fuel. 30lts give me 525 k's... Also since its got the 3inch and 20% tint i drive it carefully not to attract too much attention. Its hard tho not to attract attention:D hehe But i think its due to the drums and 2 different wear height front old pads. Pretty sure i could get it better with a fluid flush, new good pads, rear RX disk, But i want the lib gear and rather spend the money on that:). Ohhh did i say im putting front Rs 2 pots calipers:D hehe

Ok so seems like i'll wait to install everything at once. But i have a few more questions.

Andrew, What about the brake pedal, does that bolt on to the master without mods?

Wrxer, Does that tool bend the pipes?

Should i worry about that residual line pressure valve when i install the Master unit and 4 calipers?

wrxer · Post by **wrxer** » Sat Sep 26, 2009 7:18 pm

i got bender as well as flarer, but you can bend pipes easy around a socket or pipe.

AndrewT · Post by **AndrewT** » Sat Sep 26, 2009 8:32 pm

I've only changed the master cylinder to a lib one myself, didn't change the booster.

guyph_01 · Post by **guyph_01** » Sat Sep 26, 2009 9:48 pm

hey andrew can you clear your inbox?

Also what a flarer and bender?

Thx guys

AndrewT · Post by **AndrewT** » Sun Sep 27, 2009 11:10 am

U need that to bend and flare brake lines. Bend them to go the direction u want, and flare the ends, well have a look at the end of one of your lines and u will see.

None of that is required for this swap at all - it just bolts straight in. The lines don't require any changes.

wrxer · Post by **wrxer** » Wed Sep 30, 2009 9:17 pm

i dunno if they bolt in,mine didnt, i used 99wrx and they have outlets on rh side and top, so i need flarer and bender. if yours have 2 bottom outlets, you are good to go, as andrew says.

guyph_01 · Post by **guyph_01** » Thu Oct 01, 2009 12:37 am

I think it has two bottom so i think its all good.
Thx guys.
If i require more help i'll post it on here.
Thx again
Cheerz
Guyph

rtcb65 · Post by **rtcb65** » Thu Oct 01, 2009 7:08 am

Buy the crossbred kit and all the info you ask about, is all in the fitting paper work, that comes with the kit

guyph_01 · Post by **guyph_01** » Fri May 13, 2011 1:22 am

I was about to start this thread again on a new page before deciding to do a search. Two years later and i'm days away to finally do this swap:D
I still have a few questions tho. I had a good look at the lines. My L has three lines, two side ones and one bottom one. The master/booster I've got has four outlets.

Would blocking the extra outlet still allow the same distribution of fluid to each lines or cause more or maybe less pressure?

Would you suggest changing both the master and booster???

The car will have front RS two pot calipers and rear Lib calipers both with slotted disks.

How has replaced both? what results did they get? I know it will be hard to compare:(

What to do???

Andrew, Did you notice a big difference after you have replaced the master on your car with a lib one?

d_generate · Post by **d_generate** » Fri May 13, 2011 2:10 am

Do you by chance have an ABS unit with the extra outlet?

guyph_01 · Post by **guyph_01** » Fri May 13, 2011 8:01 pm

Tom, Pm sent

So 2day I found the right master to suit my L series. It turns out the Liberty that has the three outlet exactly like the L series is the early gen2, Well this one has exactly identical outlet positions:D

Now, should I change the master and booster or only the master????

Plz give me your views so I can make up my mind as i have no idea...

AndrewT · Post by **AndrewT** » Fri May 13, 2011 8:11 pm

Just block the extra outlet. Grab a brass threaded plug from any brake place, if you flutter your eyelashes they'll probably give it to you for free.
Difficult to tell if it made that much of a difference for me as I also upgraded to Liberty front and rear discs/calipers - obviously as a full kit it made a huge difference.
I doubt it'd increase your stopping power that much at all, but it might cause you to use a bit less effort on the foot to apply the same braking.
Mostly what affects braking is the disc/caliper combination, and mostly out of that it's disc diameter. Next is caliper clamping power (number of pots) and surface contact area.

Will be good when you get the full EJ discs/calipers on.

*edit - just noticed you found one with 3 outlets, even easier.

Regarding booster, what's to make up your mind about? It's an upgrade. If you have one, chuck it in, it's only held in with 4 bolts.