69 Ram Air system explanation - Pontiac GTO Forum
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post #1 of 4 (permalink) Old 06-09-2019, 01:31 PM Thread Starter
 
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69 Ram Air system explanation

Hello
Id love to get some pics or explanation around the 69 ram air system.
Where do the vacuum connections go and exactly what are they doing ?

Any resources out there ?

Or if someone can point me to a sight. I have a 69 judge tribute that Id like to get hooked up and would love to understand more about the system.

Thanks for any help !!!
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post #2 of 4 (permalink) Old 06-09-2019, 02:05 PM
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There's a tiny little vacuum switch that sits inside the lower pan. It's temperature sensitive. When code, it routes vacuum to the two diaphragms that are (supposed to be) in the upper pan (the part that screws to the hood) and operates a baffle that opens the air path to the hose duct (RA III) or hose ducts (RA IV) that supply warm air from around the driver side exhaust manifold (RA III) and passenger side heat crossover on the intake manifold (RA IV). The routing goes: manifold vacuum source to the switch in the pan (both connections are on the underside of the pan), and from there around to the front of the pan, through a rubber grommet, and up to a that connects to the Y that feeds vacuum to both the diaphragms in the upper pan.

I'm sure there are diagrams "out there" that show the connections, I just don't happen to have one in front of me right now.

Bear

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post #3 of 4 (permalink) Old 06-09-2019, 02:47 PM Thread Starter
 
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Thanks Bear

Ill do some digging....seems pretty simple.

Question....is the pull leaver under the dash part of the system?
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post #4 of 4 (permalink) Old 06-10-2019, 01:01 AM
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Quote:
Originally Posted by Osubucks999 View Post
Thanks Bear

Ill do some digging....seems pretty simple.

Question....is the pull leaver under the dash part of the system?
Yes. It's a cable push/pull that closes and opens the flapper doors behind the scoop inlets.

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