View Full Version : How to Hook up the Distribution block
68camarors Jul 15th, 06, 09:36 AM Hey guys, I've searched many threads but have can't seem to find a diagram or instructions on how to hook up a distribution block to the master cylinder. Which lines go where type of thing.
Anyone know of a link to some instructions on this?
Thanks
JimM Jul 15th, 06, 11:27 AM What type of distribution block?
For drums, the rear master prot goes in the back hole
rear brake line in the outside rear hole,
front master port in the forward outside hole,
left front brake in the front hole, and right front brae in the inboard front hole.
Here's a link that shows a few stock combinations.
http://thefirstgensite.com/brake2.htm
I do not have one for a system using a late model combo valve tho, sorry.
JimM Jul 15th, 06, 11:29 AM this page shows a cutaway of a 71 and later style valve, may help
http://thefirstgensite.com/brake1.htm
68camarors Jul 16th, 06, 05:04 PM Thanks, this might get me started. I have removed the drums in the front and put on New Wilwood discs, leaving the drums on the back.
The old distribution block that was on it was a lot smaller than the one I am installing. Also I've added a power booster along with a new master cylinder.
Got any similar illustrations with Disc brakes or is it pretty much identical?
Thanks
JimM Jul 16th, 06, 05:27 PM couple of current posts on that stuff, take a peek for them.
With the conversion you're doing, I'd guess they sent you a 71 and later combo valve, look at the second link I posted, it has a cutaway of that valve with all the ports labelled.
The calipers go behind the wheels... current post on that, too.
68camarors Jul 17th, 06, 11:27 PM couple of current posts on that stuff, take a peek for them.
With the conversion you're doing, I'd guess they sent you a 71 and later combo valve, look at the second link I posted, it has a cutaway of that valve with all the ports labelled.
The calipers go behind the wheels... current post on that, too.
Thanks, and you are correct. They did send me a 71 or later version. This is not the one I want to use because the brake lines are not bent to match. It's way off and I would need to use flexible lines to hook them up to the distribution block. Is this a good assumption?
JimM Jul 18th, 06, 08:11 AM getting into territory where a real brake expert might be helpful, but...
You may be able to get away with using the stock drum brake distribution block and an adjustable proportiong valve in the rear brakeline, I dunno.
What master are you using?
What is it's bore and is it intended for a disk / drum setup?
power or manual?
The thing you need to avoid is the back brakes locking before the fronts. A proportioning valve will allow you to limit the pressure to the rear brakes to avoid rear lockup.
There is some good info on this at http://www.pozziracing.com
ohcscott Jul 19th, 06, 12:07 AM The new links for those firstgensite articles is found here:
http://thefirstgensite.com/forum/kb.php?mode=cat&cat=1
The old links might be shut down eventually.
The first link Jim attached shows both disc and drum. Just scroll.
The addendum I'd like to make to it is that 67 in/out for the rear was swapped (both drum and disc I believe).
and same basic differential valve (distributor and switch assembly / splitter) was used for some other vehicles with in/out swapped both/either front and rear, including Corvette, Corvair, and Pickup. Since this is simply a differential valve, with no pressure changing capacity, swapping in/out is fine.
you can use the OE block for disc/drum, disc/disc, or drum/drum. The factory did. Just use an adjustable in the rear line, as suggested.
If you change to a later style combination valve, you'll have to change hard lines a bit. Also there are many different combination valves, not just one disc/drum and one disc/disc as many sellers might have you believe.
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