Where to put Vac for Brake and PCV? - Vintage Mustang Forums

 
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post #1 of 7 (permalink) Old 06-19-2017, 11:25 AM Thread Starter
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Where to put Vac for Brake and PCV?

I have a 351C stroked to a 408 with a 600+ lift Roller Cam and a AOD Trans.
I just installed a Power brake Booster, do I put the Booster Vacuum to the back of the Carb or the Manifold.
Then where do I put the PCV?
Thank you!

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post #2 of 7 (permalink) Old 06-19-2017, 11:36 AM
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As long as the booster gets manifold vacuum, it really doesn't matter from where, I prefer from the manifold. I usually see the PVC connected to the carb.
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post #3 of 7 (permalink) Old 06-19-2017, 11:42 AM
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Yes check the carb, it should have a connection. What carb you running? The Eddys have them in front.
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post #4 of 7 (permalink) Old 06-19-2017, 11:43 AM
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I have a 65 289 stock setup. PCV valve to the carb spacer, brake booster to the manifold.
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post #5 of 7 (permalink) Old 06-19-2017, 12:02 PM
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What are your cam specs? .600+ lift sounds like not a lot of vacuum to spare for things like the power brakes. You might need an electric vacuum pump or a vacuum reservoir to make it work properly. Or you might find yourself putting the shifter in neutral quite often so you can rev the engine to generate the required vacuum for the the booster (been there done that.......)

PCV to the carb, booster to the intake.

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post #6 of 7 (permalink) Old 06-20-2017, 03:12 AM Thread Starter
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I'm using a Quickfuel Vac Sec 780 and an Edelbrock RPM Air Gap Manifold.

I was thinking Manifold Vac for the Booster?

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post #7 of 7 (permalink) Old 06-20-2017, 04:41 AM
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Originally Posted by prayers1 View Post
I'm using a Quickfuel Vac Sec 780 and an Edelbrock RPM Air Gap Manifold.

I was thinking Manifold Vac for the Booster?
I ended up buying a T fitting to connect the vacuum modulator from my transmission and the power brake booster to the back of the intake manifold. They do exist with different size valves on each end but you may have to scan eBay depending on what you need. And then PCV to the front of the carburetor, smaller opening on the PCV capped.

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