Everything you wanted to know about brake boosters and master cylinders

[Bmjpv]

intake mod

yes there are pics, look further back in this post. joe

[m_dudey]

Seriously, the intake manifold is EASILY modified to fit the stock booster.. Leaving the last two full length ribs on the back side, cut the plastic out, and using UV resin and fiberglass from any surfshop lay a new wall to the shape of the booster. 5 mins in the sun, light sanding, black paint, and you're done.
$20 vs. $150+ for the booster...

any pictures of your modified intake manifold to fit the stock e30 booster?

[dude8383]

First damn post man!

yeh yeh...i bought that reservoir already, i just wasn't sure if you guys were talking about the same one :)

thank you :)

[equate975]

Sorry to resurrect from the dead, but I noticed that no one answered his question, and well I have the same question.

What did you guys do about the line going to the clutch reservoir?

First damn post man!

Get yourself an e30 325IX brake booster, I used an e34 m5 master cylinder part number 34331156978.

For the remote res.

http://www.realoem.com/bmw/showparts...34&fg=25&hl=15

GET THESE:
05 EXPANSION TANK GIRLING 1 34321160576
02 PLUG 2 34311163464 WILL NEED TWO OF THESE


Here is the parts




Put your booster and new master cylinder together, then it all just pushes together





I found that where I have my reservoir now, the lines can get caught in the throttle body linkage, also they get in the way of the intake boot

The best place I can find to mount it would be on the plate where the old airbox attached next to the ABS unit

[dude8383]

what about your clutch resevoir?? on the e cars. on the e cars using the getrag you have your hydrolic feed line running from the resevoir thats on top of the master cylinder. what are you guys doing about that???

Sorry to resurrect from the dead, but I noticed that no one answered his question, and well I have the same question.

What did you guys do about the line going to the clutch reservoir?

[Bmjpv]

24v with stock booster !

Glad to here that it worked out for you. I know it's really easy ,much cheaper (you e30 guys like that) and when matted up with a 25mm master (750i) you'll still have great brake . So you 24v swappers (US version) take a good look at this modification and protect those e30 with better brakes. I put up pics a couple of threads back about what I did. joe

[sky_captnE30E36]

Seriously, the intake manifold is EASILY modified to fit the stock booster.. Leaving the last two full length ribs on the back side, cut the plastic out, and using UV resin and fiberglass from any surfshop lay a new wall to the shape of the booster. 5 mins in the sun, light sanding, black paint, and you're done.
$20 vs. $150+ for the booster...

[Mike B.]

Yep, that's the one. It looks bigger in the picture than in person.

I plan on mounting it on the bracket that used to hold the air filter box. The only issue I see is the fitting size is smaller dia. than the vacuum hose. A hose clamp or step-down fitting may be necessary.

[Mr.SWISS]

This one?

[Mike B.]

Jegs has one that is 1L in size (5"x7" approx). It's a bit larger than the charcoal canister.

I bought one for my Euro swap and it should fit under the MAF/Intake Boot.

[Mr.SWISS]

Anybody found a vacuum canister with the proper size fittings that isn't the size of a basketball? kthanxbai

[nefarious7907]

brake feel almost has to change. You are going to a smaller booster, so there is going to be some loss of assist. But the Mk I booster appears to be somewhat thick, so maybe its not too bad.

[1990m3]

got any pics of the MKII booster install?

[MIKe30]

http://www.e3024v.com/project6.htm

3/4 of the way down

thanks! btw, thats a siiick touring.

Im using a mk11 vw golf booster, bolts right up!

mk11!!!! :eeek: must cost a fortune!

haha, how do the brakes feel? normal... or not so good like some people say the e21 boosters make them feel?

[Mike B.]

Bmjpv - Nice work!!