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Old 10-31-2020, 08:23 PM
lucky1 lucky1 is offline
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Default PCV vacuum ?...

Anyone know why there are two vacuum connections on the 65-66 tri power
Manifolds For the PCV hose instead of just one. .?..

Also would you lose PCV efficiency if you only used one of the two nipples and
Capped the other ??

Thanks as always.

  #2  
Old 11-01-2020, 06:07 AM
Kenth's Avatar
Kenth Kenth is offline
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They distribute the crankcase gases to both planes inside the intake for all cylinders to burn the gases.
You can get the correct tee at Ames.
The brake booster hose/tube/nipple is connected at rear of front carb.

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Old 11-01-2020, 04:05 PM
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60sstuff 60sstuff is offline
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It’s not just the Tri-Power intake manifold.

Same design for the 4BBL. intake manifold.

Chris.
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1) 65 GTO Survivor. 43,440 Original Miles. “Factory” Mayfair Maize Paint with Black Pinstripe, Black Cordova Top, Black Interior, OEM Numbers Matching Powertrain. Purchased from the Lady that bought it new. Baltimore Built (11A).
2) 66 GTO Survivor. “Factory” Cameo Ivory Paint with Red Pinstripe, Red Interior. OEM Numbers Matching Powertrain. Tri-Power (OEM Vacuum Linkage), Automatic "YR" code (1759 Produced). Fremont Built (01B), with the Rare 614 Option.
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Old 11-01-2020, 08:00 PM
lucky1 lucky1 is offline
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Default Thank you.

Thank you.

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Old 11-16-2020, 08:15 PM
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Tom Vaught Tom Vaught is offline
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I know this is the Tri-Power forum but some 4 BBL info for you as related to the PCV system.

The later 4 bbl intakes have a single inlet (Hose) connection to the intake but the fitting is actually designed (if you remove one of them) so that vapors (CFM) from the PCV Valve is directed to both planes of the 4 bbl intake.

It threads into the upper intake plane but feeds both the upper and lower intake planes with fumes from the crankcase area or thru the Valve cover in a few engines.

Tom V.

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