Brake Boosters

[Golf Loon]

Just thought I`d show you all what I`ve been up to today.
I have a booster and master cylinder from a 1986 audi 80. It is much bigger in diameter than the golf one and the master cylinder is less bulky.

It has a collar which connects it to the audi, with four bolts bolting it to the booster and three bolting it to the car. If I remove this collar, it should match up with the golf studs and fit up to the brake rods.





As you can see, i got the collar off. Now to match up to the golf bracket.



The audi booster has a longer arm, but it has a thread on at the same point as the golf one. Now if I can undo the rod, I can mount it up....

Easier said than done. Won`t shift. I`ve soaked it in penatrating oil and will try again on the morrow...

[imported_brackie]

Brake post

[Golf Loon]

Got the end off the audi booster, but it is still too long. The rest of it all measures up. Am gonna get dubstaMk2 to cut and weld the two rods together.. Here are the two boosters. The Audi one is the larger.

[sydneymk1]

boys boys boys can i let u in on a little scret
i run a nine inch booster in my project golf for over a year gives a big improvement to braking performance the only thing is u have to be careful about the length of that rod very important can affect pedal height and travel. the other important thing is if u have up graded your brakes to much bigger u also need to up grade to a biggger master cylnder 22mm. i dont know what the booster came from but can tell u where to get it. GTI imports 96531114 im gonna put a post up 4 him

[Golf Loon]

This is a booster and master cylinder from an Audi 80, which is larger and stronger and so equal to putting a bigger booster from a Golf on. Obviously the rod has to be the same length and does have threads on, however, these were hard to remove without damaging the booster, so welding was easier. Thus you end up with a larger booster and master cylinder for a fraction of the cost of a Golf one from Brian. Last time I spoke to him, he was still promising bigger master cylinders and scirocco brake calipers, but not delivering. I know several people have had issues with dealing with him, and will not comment, but please also be a little restrained in your posts, as we do not want to read his name everywhere.
People know where he is and thats cool, but he is not the only solution and the scene needs new input to grow.

[imported_brackie]

the only thing is u have to be careful about the length of that rod very important can affect pedal height and travel.

Could this be the source of my problems with my Audi 100 brakes?? Is there a spacer in there that's dropped out or something?

See my earlier posts in Audi "Brake Story".

[evorobin]

I've just sourced a 22mm master cylinder from the states for cheap. I've heard a bigger servo is also needed to improve braking?

[h100vw]

Easier said than done. Won`t shift. I`ve soaked it in penatrating oil and will try again on the morrow..

Those rod can be really, really tight. Having done this to many MK1s in my time. I have always managed to undo them. Sometimes a bit of 'heat' helped matters.

I don't think cutting and welding is the best way to go.

When you get the fork off you just need to get the length right by cutting of the correct amount of threads. I just measured from the mounting face of the original to the end of the fork.

Apologies if I am stating the obvious to anyone.

On another note, I fitted a servo off a Vauxhall Senator to my wifes mk1 GTI. This was a marvelous conversion. The assistance was incredible. It would out brake my 270mm disc and 22mm master cylinder and mk2 servo setup easily.

Everything else was std on the car. You only got 2 good stops out of it before it overheated the pads. That could be sorted though. I always forgot about the brakes when driving it, nearly butting the screen and pulling up short at every junction.

Gavin

[Golf Loon]

I have unthreaded them before. This one had a really long arm on it, which did not have thread going down the rod far enough. Its welded and functional now, pics soon.

What year vauxhaul senator was it? and did it bolt straight on?
In Australia the vauxhal senator is the holden commodore and there are heaps of em!

[h100vw]

What year vauxhaul senator was it? and did it bolt straight on?
In Australia the vauxhal senator is the holden commodore and there are heaps of em!

I thought there would be an Australian equivalent. It would have been a late 80s one. I just found the servo in a mates scrapyard. The bolt pattern was the same, I took a chnace that it would fit. Just had to get the rod the right length and 'warm up' the bottom of the expansion tank and jam it in. The bonnet would shut otherwise

Gavin