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Old 04-26-2013, 08:50 AM
buddy in texas buddy in texas is offline
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Default Help with a/c-heater vacuum line on 3x2 setup.

Just installed my factory air setup on my 65 GTO with tri-power. Can someone tell me where to connect the vacuum line to the manifold and be correct for 1965. I currently have 2 vacuum lines between the middle and back carbs that connect with an "F" shaped plastic fitting that then connect to my PCV valve. Where do I connect for the a/c-heater vacuum? A picture is worth a thousand words. Thanks.

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Old 04-26-2013, 09:03 AM
Zimtok Zimtok is offline
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The diaphrams don't require a lage volumn of vacuum like the PCV or brake booster.
I believe you will connect the vacuum to the base of the center carburator where the vacujum advance of the distributor is connected.
Just put a "T" fitting back by the distributor and then into the firewall.
That is where my console mounted vacuum gauge is connected to.


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Old 04-26-2013, 12:38 PM
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Dick Boneske Dick Boneske is offline
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The fitting used by the factory is pictured below--screwed into the center carb throttle base. It's a brass "T" fitting. The driver's side goes to the distributor for vacuum advance. The passenger side goes to the air conditioner controls via a 1/8" pipe that attaches to the rubber hose to the firewall. Note that there are several styles of "T" fittings. The '61-'62 versions were short, the '63 and early '64's were long like the '65, but used a smaller line for the a/c.

You can see it in the upper left corner of the second picture on a '64 Tripower. The last picture shows the pipe stub that connects to the a/c on a '65 Tripower.
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Old 04-26-2013, 08:38 PM
buddy in texas buddy in texas is offline
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Quote:
Originally Posted by Zimtok View Post
The diaphrams don't require a lage volumn of vacuum like the PCV or brake booster.
I believe you will connect the vacuum to the base of the center carburator where the vacujum advance of the distributor is connected.
Just put a "T" fitting back by the distributor and then into the firewall.
That is where my console mounted vacuum gauge is connected to.


.
Thank you for your help.

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Old 04-26-2013, 08:45 PM
buddy in texas buddy in texas is offline
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Quote:
Originally Posted by Dick Boneske View Post
The fitting used by the factory is pictured below--screwed into the center carb throttle base. It's a brass "T" fitting. The driver's side goes to the distributor for vacuum advance. The passenger side goes to the air conditioner controls via a 1/8" pipe that attaches to the rubber hose to the firewall. Note that there are several styles of "T" fittings. The '61-'62 versions were short, the '63 and early '64's were long like the '65, but used a smaller line for the a/c.

You can see it in the upper left corner of the second picture on a '64 Tripower. The last picture shows the pipe stub that connects to the a/c on a '65 Tripower.
Thank you so much. Pictures are worth a thousand words. Any idea where I might find one of the long "T" fittings?

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Old 04-26-2013, 11:44 PM
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Ames has them along with the a/c short pipe.

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Old 04-27-2013, 09:11 AM
buddy in texas buddy in texas is offline
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Quote:
Originally Posted by Dick Boneske View Post
Ames has them along with the a/c short pipe.
And thank you again.

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