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manxmark Samba Member
Joined: February 24, 2007 Posts: 224 Location: Western Australia
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Posted: Tue Jan 12, 2010 6:15 pm Post subject: |
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Much like pulling on the hand brake do you mean?
I have heard of a guy that has that setup (he's in Queensland on the other side of the country). I've often wondered how well it worked for him. Maybe not that good.
If I go for the discs it sounds like it would need to be 4 wheel discs with a Porsche master cylinder. |
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Gerrelt Samba Member
Joined: December 22, 2004 Posts: 682 Location: The Netherlands
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Posted: Sat Jan 23, 2010 9:39 am Post subject: |
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I've test-fitted a caliper:
But I discovered I have to change my (custom) exhaust. The caliper is hitting the (motorcycle) muffler..
More details here: link to new addition _________________ homepage
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dune limo Samba Member
Joined: March 09, 2007 Posts: 125 Location: Australia
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Posted: Sat Jan 23, 2010 5:54 pm Post subject: |
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manxmark wrote: |
Much like pulling on the hand brake do you mean?
I have heard of a guy that has that setup (he's in Queensland on the other side of the country). I've often wondered how well it worked for him. Maybe not that good.
If I go for the discs it sounds like it would need to be 4 wheel discs with a Porsche master cylinder. |
If your twin 19 mm master cylinder is working fine that is all you need for 4 wheel disc brakes--if it needs replaceing get the 20.6 MC you get a better peddle feel |
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manxmark Samba Member
Joined: February 24, 2007 Posts: 224 Location: Western Australia
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Posted: Sat Jan 23, 2010 6:24 pm Post subject: |
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I would have thought that the standard disc / drum master cylinder would have been no good as the drum part of the master cylinder would have a built in residual pressure valve. If this was used with rear discs wouldn't the rear brakes drag all of the time? |
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Turtletime Samba Member
Joined: September 17, 2009 Posts: 129 Location: Ocean City, Md
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Posted: Sat Jan 23, 2010 6:59 pm Post subject: |
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didget69 Samba Member
Joined: July 22, 2004 Posts: 4927 Location: Raleigh, North Carolina
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Posted: Sat Jan 23, 2010 10:40 pm Post subject: |
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Russ Wolfe wrote: |
Why not use 914-4 rear disc brakes. Probably cheaper and easier to source.
914-6 was not a common car. |
914-4 rear calipers are getting harder to find; you can get the rebuild kits, but new and/or reman calipers are scarce...
bnc _________________ I never found the need to impress people with any mechanic certifications, trophies or track wins... unless it was for Mom to post on the refrigerator door. |
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Gerrelt Samba Member
Joined: December 22, 2004 Posts: 682 Location: The Netherlands
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Posted: Mon Feb 15, 2010 12:57 pm Post subject: |
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Here is some info on the passat brackets.
The golf and passat bracket:
This is the reason the passat brackets have to be used:
The Golf bracket is angled, this brings the caliper outwards. The Passat bracket is straight, which is more convenient for the VW beetle rear axle and Porsche 914 disk combination.
Here you see the part number of the passat bracket:
It reads: 5780/2 Lucas.
I also have the left drum machined too:
Fits perfectly!
Now I need some brakelines custom made..
The black flexible hose has to be connected to the copper coloured hard line. I will have to get a new flexible hose and hardline made. The new hose has to have a connection fitted at one end where the hardline can be screwed into. I will probably have to create a support plate on the trailing arm where this connection can be attached. It should eventually look just like the flexible-hardline connection in the upper left corner of the picture. _________________ homepage
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Gerrelt Samba Member
Joined: December 22, 2004 Posts: 682 Location: The Netherlands
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Posted: Sun May 09, 2010 11:46 am Post subject: |
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It's finished!
This is the entire "Kit" :
All assembled:
With the wheel on:
I am using the original VW beetle handbrake cable.
It works great! See the whole story here: LINK _________________ homepage
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dune limo Samba Member
Joined: March 09, 2007 Posts: 125 Location: Australia
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Posted: Mon May 10, 2010 8:05 pm Post subject: |
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Nice install |
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kumatiger Samba Member
Joined: December 21, 2008 Posts: 117 Location: Manchester, NH, USA
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Posted: Mon May 10, 2010 9:07 pm Post subject: Master cylinder |
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Nice work on the kit!
Given all the bad things I hear about Chinese sourced VW master cylinders, has anybody just gone to the junkyard and dropped in a master from a more recent four wheel disc vehicle? Something like a newer VW cylinder or a SAAB master cylinder (Volvo has a three circuit one I think if you really want overkill).
I'm going to start a disc conversion I'm just wondering if I should even bother with a Chinese $30 dual circuit master cylinder and if my money is better spent on a decent european master from a late model car. Also from what I hear about all the crappy brake switches, I think I'd rather just mount a switch on the pedal assembly and not worry about brand new switches failing after a month or two of use.
Which master cylinder are you going to use in yours? |
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Russ Wolfe Samba Member
Joined: October 08, 2004 Posts: 25187 Location: Central Iowa
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Posted: Tue May 11, 2010 9:07 am Post subject: |
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Most later European cars, have power brakes.
The master cylinder size is designed for that.
Ever tried to stop a car with power brakes, and the engine is not running?? _________________ Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey
Gary: OK. Ima poop. |
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Gerrelt Samba Member
Joined: December 22, 2004 Posts: 682 Location: The Netherlands
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Posted: Tue May 11, 2010 12:46 pm Post subject: Re: Master cylinder |
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Thanks!
kumatiger wrote: |
Which master cylinder are you going to use in yours? |
I am using the standard master cylinder, that belongs to my 1303 S. The "S" in europe means it's got front disc brakes instead of drums.
But I've read that the master cylinder for a Porsche 924 or 944 will fit too. And these have different diameters than the beetle one (it could be dependent on model spec though..). _________________ homepage
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Russ Wolfe Samba Member
Joined: October 08, 2004 Posts: 25187 Location: Central Iowa
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Posted: Tue May 11, 2010 1:25 pm Post subject: |
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What is the part number on that 1303S master cylinder? _________________ Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey
Gary: OK. Ima poop. |
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Gerrelt Samba Member
Joined: December 22, 2004 Posts: 682 Location: The Netherlands
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Posted: Wed May 12, 2010 1:27 pm Post subject: |
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I don't know.. I don't think it's any different than the ones sold for the beetles today. The mexican beetles have discs up front too (I think?) , so it's probably the same as those ones. _________________ homepage
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pacorrison Samba Member
Joined: August 07, 2010 Posts: 1 Location: Mexico city
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Posted: Sat Aug 07, 2010 2:31 am Post subject: |
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hi folks!!!
I'm Mexican and I have this change in my mexican bug!!
now I have rear disc brakes with calipers of A4, but I use disc up front, because in Mexico is very dificult find rear disc brakes of porsche.
And I have dual circuit master cilinder stock in my car, but I have a problem because the pedal feel espogy, for that reason I will have tried use master cilynder of 20.6mm by empi.
Did you try to use the master cilynder of 20.6mm before?
do you have any tip for me?
sorry for my english, I hope you understand.
grettings from Mexico!! |
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E_bug Samba Member
Joined: January 02, 2009 Posts: 12 Location: GREECE
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Posted: Sat Nov 20, 2010 1:57 am Post subject: |
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Hello from Athens Greece.
I was inspired by Gerrelts awsome build page and I decided to have a go at it. I bought some 914 rear disks from Brombacher in Germany, they are Sebro brand and now I will have my rear drums cut. I have a question on the dimentions of the machining of the rear drum.
[img]
I will machine a locating ring but how deep should I do it?[/img]
What is that dimention with the arrows?
_________________ aircooledpower.blogspot.com |
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Gerrelt Samba Member
Joined: December 22, 2004 Posts: 682 Location: The Netherlands
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Posted: Wed Dec 08, 2010 11:58 am Post subject: |
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E_bug wrote: |
I will machine a locating ring but how deep should I do it?
What is that dimention with the arrows?
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I had 2 mm machined off the surface of the drum. This was what Mike (from sharpbuilt) told me, and it was perfect! _________________ homepage
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