1965 273 4-bbl intake. What is this connector for?

-
Stumpy

Stumpy

FABO Gold Member
FABO Gold Member
Joined
Aug 10, 2020
Messages
185
Reaction score
193
Location
WA
I cannot figure out what this two prong connector is for. Nothing is connected to it right now. It is on an original 4-bbl intake manifold in the back on the driver’s side.

This is in a 65 Dart hi-po 4-speed, manual steering no AC car with an aftermarket 4 bbl.

1DCBEEFC-FDB6-438F-9485-91509B349998.jpeg
 
Stumpy said:
I cannot figure out what this two prong connector is for. Nothing is connected to it right now. It is on an original 4-bbl intake manifold in the back on the driver’s side.

This is in a 65 Dart hi-po 4-speed, manual steering no AC car with an aftermarket 4 bbl.

View attachment 1715963304
Click to expand...
Mike69cuda said:
I think somebody plugged a vacuum port with a sender.
Click to expand...
Yep, someone just plugged the hole.

100_5147.JPG
 
Mike69cuda said:
I think somebody plugged a vacuum port with a sender.
Click to expand...

What was the original use for the vacuum? I’d guess a power steering unit given it’s location but this car never had power steering. What sized bolt is that plug Mike? 3/4”?
 
Don’t know the original use. Maybe it was originally plugged. I think it is a pipe thread plug size.
 
Stumpy said:
What was the original use for the vacuum? I’d guess a power steering unit given it’s location but this car never had power steering. What sized bolt is that plug Mike? 3/4”?
Click to expand...
Dartsun said:
I do wander what that was for. I see the port for the brake booster on toolmans
Click to expand...
Mike69cuda said:
Don’t know the original use. Maybe it was originally plugged. I think it is a pipe thread plug size.
Click to expand...
I can't make out the casting number in the OP's photo. My manifold is for 1966 with CAP (Clean Air Package) 65 didn't have the shared port. I think all the 66 and 67 manifolds had the shared port and some of those weren't drilled and tapped. I don't believe I have ever seen anything plugged into that shared port though.
 
Last edited:
toolmanmike said:
I can't make out the casting number in the OP's photo. My manifold is for 1966 with CAP (Clean Air Package) 65 didn't have the shared port. I think all the 66 and 67 manifolds had the shared port and some of those weren't drilled and tapped. I don't believe I have ever seen anything plugged into that shared port.
Click to expand...

Casting # is 2465726 so a 1965.

4E059DDA-C1A6-4D4F-BE9E-5768BE966F5C.jpeg
 
Stumpy said:
What was the original use for the vacuum? I’d guess a power steering unit given it’s location but this car never had power steering. What sized bolt is that plug Mike? 3/4”?
Click to expand...
The port is for power brakes- power steering has nothing to do with manifold vacuum. Size should be 3/8 NPT.
Agree with the above- someone probably misplaced the original plug and just used a spare sender to plug the hole.
 
Professor Fate said:
The port is for power brakes- power steering has nothing to do with manifold vacuum. Size should be 3/8 NPT.
Agree with the above- someone probably misplaced the original plug and just used a spare sender to plug the hole.
Click to expand...

Power brakes…right. I don’t know what I was thinking. Thanks much for thread size. I’ll pick up an actual plug for it at the hardware store.
 
toolmanmike said:
I think all the 66 and 67 manifolds had the shared port and some of those weren't drilled and tapped. I don't believe I have ever seen anything plugged into that shared port though
Click to expand...
On the 67 CAP 4bbl that I have, the underside of the center , "shared" plugged port has no connection to any port. Another member has one that has threads in it like Mike's, mine is not drilled or tapped.

The break booster port is the one on the left IN the runner on both manifolds.
 
Dana67Dart said:
On the 67 CAP 4bbl that I have, the underside of the center , "shared" plugged port has no connection to any port. Another member has one that has threads in it like Mike's, mine is not drilled or tapped.

The break booster port is the one on the left IN the runner on both manifolds.
Click to expand...
Yes, strange that it even exists. Like I mentioned, I have never seen anything connected to that shared port fitting. No clue what it is there for. Just speculating.
 
The oddest thing is that the casting around it on the inside looks like it is an after thought on the casting.


Tapped power brake port from inside the runner
20180619_103338.jpg


Underside of the "shared" port to nowhere
20180619_103316.jpg


Casting number of the 67 CAP 4bbl manifold
20180619_103222.jpg


Visable power brake tapped port and undrilled or tapped "shared" port to no where
20180619_103215.jpg
 
toolmanmike said:
Yes, strange that it even exists. Like I mentioned, I have never seen anything connected to that shared port fitting. No clue what it is there for. Just speculating.
Click to expand...
It was probably there to aid in casting somehow. They tapped threads in it for a plug and plugged it off.
 
Stumpy said:
What was the original use for the vacuum? I’d guess a power steering unit given it’s location but this car never had power steering. What sized bolt is that plug Mike? 3/4”?
Click to expand...
The vacuum were for the brake booster and an air condition.
 
That intake vacuum source was used for power brake booster, A/C vacuum control, and C.A.P. control valve, depend in the fitting used.
 
cudamark said:
That intake vacuum source was used for power brake booster, A/C vacuum control, and C.A.P. control valve, depend in the fitting used.
Click to expand...
What CAP control valve did they use?
 
You must log in or register to reply here.
-

Back
Top