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Posted by: mepstein Feb 2 2017, 08:37 AM

Want to buy, or trade for a part you need. Im looking for an early brake pressure regulator in good core condition that I will be able to use to have restored. (It can't be rusted beyond use please) I have a late model if you want to trade or other parts you might need.
Email mark@markepstein.net
Thank you.

Posted by: rdauenhauer Feb 2 2017, 11:16 AM

Mark how are you ID'ing the early from the late?

Posted by: mepstein Feb 2 2017, 12:21 PM

I can show you the late so you know which one it's not. Thanks

Posted by: stugray Feb 2 2017, 12:33 PM

I have a couple, post your pic so we can tell early from late.

Posted by: mepstein Feb 2 2017, 01:12 PM

Late


Attached image(s)

Posted by: bdstone914 Feb 2 2017, 10:32 PM

I probably have a couple if you need one. PET shows the break between early and late at VIN 474 291752.

Posted by: altitude411 Feb 2 2017, 11:38 PM

So is this just a date code thing? early/late. Here are the early/late images from PMB site http://www.pmbperformance.com/914-brakes.html ( he uses the same photo for both early/late) and mine from my six and they all look the same as your photo...
* except for your rust and my dirt/filth

Posted by: mepstein Feb 3 2017, 06:41 AM

No, Eric may use the same picture but the two are different. Bruce/bdstone, can you dig up an early one?

Posted by: davep Feb 3 2017, 10:13 PM

QUOTE(bdstone914 @ Feb 2 2017, 08:32 PM)

Posted by: Garold Shaffer Feb 6 2017, 11:31 AM

Here are the two different styles. Haven't cleaned these up yet, but you get the idea.

Mark sent you a PM




Attached image(s)

Posted by: bdstone914 Feb 6 2017, 11:47 AM

Looks like Gerald has you covered.

Posted by: mepstein Feb 6 2017, 11:51 AM

Garold - thank you. The effort you put into this was way more than any proffit you could hope to make but once again you help me anyway.
Mark

Posted by: Eric_Shea Feb 6 2017, 06:29 PM

Mark, the picture you have is of an "Early" not a late (T-fitting).

Here's the skinny, and, think "economies of scale"

Early pressure regulators had a fluid inlet at the bottom and a fluid outlet at the top. A single inlet was fine but, the outlet now needed to go to the left and the right sides of the car. A brass "T" fitting with a banjo bolt was employed to do the job.

The valve had always been bossed for multiple outlets but, only the one at the top had been tapped to 10x1. In Garold's picture above you can see the boss on the early regulator on the left (circled in green).

Later pressure regulators were simply tapped on the top "and" now the back side facing the firewall. The right side line went into the back and the left side went directly into the top. This did away with the more expensive components (brass T fitting, banjo bolt and copper washers). You can see the later one with the same boss tapped to 10x1 on the right (circled in red). Eliminating the T was a cost saving measure.



So... the down and dirty; early ones have the brass T, later ones do not. If your pressure regulator is missing you can tell by the VIN or, by your lines. Early ones have straight line ends that go directly into the T. Later ones have 90 degree bends at the end of the lines.

Posted by: mepstein Feb 6 2017, 06:47 PM

One last question E - when was the transition to late?
I thought my '74 would have a late regulator on it but I guess it's an early one as well.

Posted by: bdstone914 Feb 6 2017, 07:33 PM

QUOTE(mepstein @ Feb 6 2017, 06:47 PM)