Need your opinion on disc brake vacuum - Pontiac GTO Forum
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post #1 of 7 (permalink) Old 05-11-2019, 04:35 PM Thread Starter
 
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Need your opinion on disc brake vacuum

Not sure where to connect my vacuum from my booster. Can I just T it off at the rear of the carb? Not sure if you can see my current set up but they both currently go to pcv valves.



Ill get a pic in a bit. Not letting me attatch.

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post #2 of 7 (permalink) Old 05-11-2019, 04:52 PM Thread Starter
 
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Heres a pic.
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post #3 of 7 (permalink) Old 05-11-2019, 05:11 PM
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The PCV on a '67 gets its vacuum from two fittings at the front of the manifold, by the carb, that go into a special nylon Tee. The brake booster connects to the carb where your current PCV line is.
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post #4 of 7 (permalink) Old 05-11-2019, 08:49 PM Thread Starter
 
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Originally Posted by geeteeohguy View Post
The PCV on a '67 gets its vacuum from two fittings at the front of the manifold, by the carb, that go into a special nylon Tee. The brake booster connects to the carb where your current PCV line is.
Thanks, I'll search for that tee. Can I hook both pcv valves to that tee? By the way. I was going to order a aftermarket gauge set with a tach and oil pressure gauge. where would I connect the tach wire? Would that be the + on my points distributor? And I am guessing I need different oil sending unit than one for the idiot lights?
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post #5 of 7 (permalink) Old 05-11-2019, 10:29 PM
 
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Originally Posted by RMTZ67 View Post
Thanks, I'll search for that tee. Can I hook both pcv valves to that tee? By the way. I was going to order a aftermarket gauge set with a tach and oil pressure gauge. where would I connect the tach wire? Would that be the + on my points distributor? And I am guessing I need different oil sending unit than one for the idiot lights?

Why 2 PCV valves?

Get a manual oil pressure gauge and keep the Idiot light. You can either get a "T" and use one end for the factory electric sender and the other for the mechanical gauge. Other option, and what I do, is to use the small oil hole next to the distributor. It will have a plug in it. Remove the plug and tap the mechanical gauge/line into that oil pressure hole and you will not have to mess with a "T" fitting and keep the Idiot light as is.

Tach will have directions.
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post #6 of 7 (permalink) Old 05-12-2019, 12:58 PM
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He's confused. And needs to look at my picture again. My car is running two PCV valve HOSES....connected to the Tee. And a single PCV valve, plugged into the rear of the Valley Pan. Two hoses are because it is a dual plane intake design and it optimizes vacuum to the PCV under ALL engine running conditions. Very sophisticated for the time.
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post #7 of 7 (permalink) Old 05-12-2019, 02:07 PM
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RMTZ67, I would use the hose going to the valve cover PCV for the brake booster and replace that PCV with a vented oil filler cap or plug. Also, the correct PCV connection is illustrated in geeteeohguy's picture.
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