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Can someone post a picture of the vacuum advance

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tom999q View Drop Down
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    Posted: May/15/2019 at 11:19pm
Can someone post a picture or diagram of the vacuum system for a 1971 360 with a 2 barrel carb and no EGR or canister system? When I bought my car the vacuum hose from the distributor was dangling in the wind. I'm trying to connect it up but need to know the routing and what they plug into. Thanks!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tom999q Quote  Post ReplyReply Direct Link To This Post Posted: May/16/2019 at 5:00pm
I'm thinking it goes either to the fitting at the front of the carb or to a CTO switch on the intake manifold (which is missing from my manifold).
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: May/16/2019 at 5:12pm
Originally posted by tom999q tom999q wrote:

I'm thinking it goes either to the fitting at the front of the carb or to a CTO switch on the intake manifold (which is missing from my manifold).


My 71 2bbl 304 auto did not have a CTO switch. Only TCS on the coil bracket and temp switch on the upper radiator support.
71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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tom999q View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tom999q Quote  Post ReplyReply Direct Link To This Post Posted: May/16/2019 at 6:12pm
[/QUOTE]

My 71 2bbl 304 auto did not have a CTO switch. Only TCS on the coil bracket and temp switch on the upper radiator support.
[/QUOTE]
Can you by chance take a picture of the TCS? I think my car is missing that part.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: May/16/2019 at 6:45pm
Ok, will update with a picture tomorrow.

Here is the AM part number... 3211667 it also states Dole Div - Carol Stream, IL on the adjacent side.

71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Slate Quote  Post ReplyReply Direct Link To This Post Posted: May/16/2019 at 7:46pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: May/17/2019 at 5:30am
Here is the switched vacuum can that makes up for TCS. From what the images show in the previous reply, this is a component that is by an ambient temp switch near the radiator, and transmission. It has ben incorporated since the 70s into various emission comtrol AM engine setups, ranging to simple, without the single or dual CTO switch(s). Note in late 73 there was the use of two ambient temp switches to throw into the odd mix of controlling ignition.



71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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304-dude View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: May/17/2019 at 6:02am
Sorry, i forgot to mention, there is a round vent port used to keep debris from clogging the CTO vented vacuum line, on later engines. It runs from a port on a CTO, all the way up to the radiator support, up near where the abient temp switch is.


Edited by 304-dude - May/17/2019 at 4:44pm
71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
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tom999q View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote tom999q Quote  Post ReplyReply Direct Link To This Post Posted: May/17/2019 at 10:27am
hmm, very confusing. I've looked at the diagram in the link above but that diagram shows an engine with an egr system. My engine is a 1971 so doesn't have an egr system. Im thinking without the egr system then the vacuum hose routing is more basic than in the diagram. Could the hose from the distributor go to the hose fitting on the passenger side of the carburetor? It seems to fit there perfectly because it has a pre-bent metal line that looks to be bent to route it that way.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 304-dude Quote  Post ReplyReply Direct Link To This Post Posted: May/17/2019 at 10:37am
Are you trying to do a factory routing of vacuum or just do a direct connection for the advance? I assumed your trying to restore, and gave some info... though i had a feeling the other info would be confusing and had to adjust my comments to explain that there are various methods of how the circuit is used with CTO switches.

There is none used in 71, and just think of the vacuum solenoid being the only part to route the vacuum line.
71 Javelin SST body
390 69 crank, 70 block & heads
NASCAR SB2 rods & pistons
78 Jeep TH400 w/ 2.76 Low
50/50 Ford-AMC Suspension
79 F150 rear & 8.8 axles
Ford Racing 3.25 gears & 9" /w Detroit locker
Back to Top
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