BUGA Community
Technical => Driveline => Disk Brakes => Topic started by: wazzah on March 31, 2011, 06:56:34 PM
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Gday guys
Was wishing and hoping you guys can help me.I"m converting my swb mk1 to front hq disc and pbr calipers ,i have done the disc conversion (thanks ben) ;D..but now i need to do the master cylinder and find some brake pipes for the caliper.. ??? ???
Ive read most of the post and all you guys seem to have fitted different cylinders and have different opinions on which is the best system to use..can you guys help to fit the best and easiest master cylinder...pretty please ;D
thanks guys
wazzah
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Hey Wazzah I found the standard master cylinder works just fine if its stuffed just get it rebuilt
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mine is an XA falcon - or maybe a XB..
disc front drum rear, but i have the f100 drums on the rear of my van..
not sure what is involved in the conversion as my van had this setup when i got it, i've just replaced the current setup with newer parts.
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Wazzah
I did a similar conversion, I had one of those mobile hose guys make me up two flexible hoses to go from bedford pipe work on van into the HQ caliper, and had my standard Bedford Master cylinder resleeved. The only comment that I would offer in that the bore on the Bedford master is a bit small and there is more brake pedal travel to get the sufficient volumne of fluid into the calipers. I intend replacing brake master with early commodore master.
Cheers
Joe
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hey Joe, I used a HQ master cylinder, overcame the extra rod travel by placing a 1/2" nut in front of the rod, solved the excessive travel issue and works like a gem ;)
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Thanks guys for your advice,i think i'll give the hq master cylinder a go..
Thanks again for the advice ;D ;D
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youll just have to do something with the clip that holds the cap on the hq master cause it will cause your bonnet to sit up. cheers ben
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youll just have to do something with the clip that holds the cap on the hq master cause it will cause your bonnet to sit up. cheers ben
big hammer will fix the bonnet ;D
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I can't remember what mine is off, but it clears the bonnet with out any modifications.
It was off some small jap car, toyota corona maybe???
I spent ages at a wreckers looking under all the bonnets, trying to find where it came from.
I did find it, but silly me didn't write it down, and forgot
(http://www.buga.com.au/gallery2/main.php?g2_view=core.DownloadItem&g2_itemId=30510&g2_serialNumber=2)
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std beddie master cylinder should be fine mines pretty awesome stops on a dime . with 11'' rear drums.
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My van's a 1980 CF LWB Mk 1 with HQ discs, PBR calipers and Ford 9" rear drums. I used the stock CF master cylinder but resized it from 3/4" to 7/8" bore and it works fine. I also downsized the huge Ford rear wheel cylinders to stop them locking up. If you haven't changed the rear brakes then give the stock master cylinder a try first. You can then resize the bore if you need to.
Garry.
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that sounds interesting Garry, i'll look into that. cheers.
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is there any difference between the master cylinder of a drum and disk braked cf front end
i have just got a bedford disk front end off a 88 ambulance i also have a master setup off a 235 vc commordore
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Back in the day we used to replace the beddy gear with a Holden torana LC master coupled to a ford XC master. The bolt holes on the master were widened only slightly and the pushrod was shortened to suit, worked well
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that post was 2 years ago .... i have factory bedford dishs , xc master and lc boster .. also have hq setup ... havent fited any of these yet ;D ;D
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All good things take time, :D
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is there any difference between the master cylinder of a drum and disk braked cf front end
i have just got a bedford disk front end off a 88 ambulance i also have a master setup off a 235 vc commordore
On modern cars there is a difference between disc front/disc rear systems and disc front/drum rear systems. The difference is in the proprtioning valve. If you are running disc front/drum rear, you will need to run a m/cyl from a vehicle with that set up.
As for m/cyl bore size and w/cyl bore size, whilst some variation may not be cause for big problems, I suggest trying to match them as best as possible for best performance. I've yet to mod mine as I'm still umming over my diff set up and that will probably dictate what I do brake wise.
Isn't this fun trying to engineer out the Beddy faults!
Dallas