Remote mounted brake booster/master cyl

[HoonBoy]

I'm upgrading the brakes on my car and can't use a bigger booster as it won't fit and also need to make an adapter to fit the master cylinder to car which I can do. However I thought that it may be better to try to remote mount the booster/master cylinder so I can use the bigger booster and have more space in the engine bay.

I know that the larger booster will only give me a softer pedal, but I would still like to use one.

So, how does remote boosters etc. work? Is it like a hydraulic clutch arrangement? or am I way off track?

[LJ03L]

What car?

Anyway if it is a old Holden/ Ford, you could proably use a PBR VH40 remote booster. You mount your m/cyl to the firewall using a suitable adapter, then depending on the your brake system layout, plum the front (disc) line to the booster, then to the distribution block. Plumb the rear line (drums) straight to the distro block.

The booster works like a secondary m/cyl. Your primary m/cyl apllies presure to a piston inside the booster, which in turn, apllies pressure to the calipers via the distro block. The piston in the booster is conected by a rod to a large plate that has a diaphram, that section works like your conventional vacuum booster. It also has a few valves and a mini diaphram to contol the vacuum entering the diaphram area.

you can go here for a little more info:


http://www.stormloader.com/falconccwa/brakehint.htm

and

Here to get a nice chrome one (http://www.hotbitz.com.au/holden.htm# %20*CHROME%20EXCHANGE%20BRAKE%20BOOSTERS)

They look a bit like this:

http://www.qo.com.au/~jewels/images/VH441.jpg

[HoonBoy]

LJ30L, thanks for th info. It's for an early Lancer and it is going to have four wheel disk brakes, so the booster has to operate on the front and back wheels. However from what you said I think I can get it to work, just need to find the bits that will fit

[MrBishi]

I have fitted a GH sigma booster to mine. (I'll take some snaps for you if you want). You can then fit a commodore master cyl as they are the standard PBR pattern. The GH booster is a bit larger (I think) than a VH44.

[HoonBoy]

MrBishi, some pics would be great. When I was lining up my booster it was hitting the inner guard, how much clearance do you have?

[MrBishi]

I made room with a bashing stick :)
I'll send pics soon.

[karl_2ltGC]

lol @ bashing stick :D

hoonboy
how you doing the rears???
what fronts are you using?

[HoonBoy]

karl, I'm using sigma disks front and rear, havn't gotten around to doing them yet, when I do them I'll take some pics and post them.

[MrBishi]

GH Sigma is easy on the front for Galants or Lancer.
Starion fronts are harder but better (What I did)
Sigma rear may be abit tricky to put onto standard diff. A better option may be Scorpion disc (not sure here as I havent done either)

[Jim]

on my rally car (77 LB Lancer) I ran GH sigma front struts and brakes (just had to change strut tops and springs) and the back I ran GK scorpion. The Scorpion setup required considerable machining and I never did get the brake bias right.

I seriously doubt a sigma booster will fit in a lancer engine bay, but I believe there is a bit more room in the galants. I sized up a sigma booster and decided it was simply too large.

Have a look for either the remote booster/cylinder (even though an arm and a leg is a deposit for a new one) or check out an under dash system from one of the mini trucks (one has them, but I cant remember if it's the daihatsu delta or toyota dyna though...)

[MrBishi]

Secoh when there is a will there is a way.

Here is a GH booster in my LA bay with 1" commodore master cyl.

Hoonboy I'll send you some photos of the mounting when I pull it out (& if I don't remind me!!) Required redrilling firewall, cutting down GH spacer, trimming ribbing on firewall. Fairly easy stuff.

If you look at the passenger side they had a very similar booster to GH for the LHD version (the knock out holes are still there)

[Fat67XR]

Being the picky bugger that i am, i'm mounting my Vh40 booster under the passenger side dash in the cabin, so i have a tidy engine bay.

This may not be allowed if the car is for competition use, as some classes dont allow any fluids to enter the cabin (ie all guages have to be externally mounted).

[VKLS1]

Worried bout space saving when using a booster??

Use a balanced brake system.

BLO-215 was sellin one a while back.

Ill re-post the picture so you can have a look.

Looks like its space savin and efficient :)

http://users.bigpond.com/tjhooper/pic11.jpg



Link to brake thread ---> http://board.performanceforums.com/forums/showthread.php?s=&threadid=11727