Dumb Question but need help with choke tubes

[jeff8877]

Hi guys,

I have bought two sets of new choke tubes but both the sets tube diameter is larger than the hole they should insert into. How do these go into the piece that bolts onto the manifold? Do I have to drill out or?

 

[mrmach1]

You shouldn't have to drill anything. If they don't fit the tubes are wrong. They don't look right anyways. The should have a stop expand to stop the tube from going to far inside. At least the ones on my car do. I dont know if I'm using the right terminology or not.

 

[RacerX]

Those are the correct tubes. There are probably remnants of the old rusted off tubes left in the unit. If you look closely at the picture of the new tubes, you'll notice they neck down at the end where they insert into the heat riser. My 351C-2V has that exact same setup and I had to use a drill bit to clean mine out to get the new tubes to fit. I also used the stainless tubes so they wouldn't rust out any longer.

 

[CZ-75]

What make and bore is your shotgun?

Oh, sorry...

 

[mrmach1]

Those are the correct tubes. There are probably remnants of the old rusted off tubes left in the unit. If you look closely at the picture of the new tubes, you'll notice they neck down at the end where they insert into the heat riser. My 351C-2V has that exact same setup and I had to use a drill bit to clean mine out to get the new tubes to fit. I also used the stainless tubes so they wouldn't rust out any longer.

True I hadn't thought of that. Tube remnants could still be inside the holes.

 

[jeff8877]

Thanks guys,

Turns out I did have remnants of the old tube in hole so will need to drill out to remove.

Another question now...When I hold up the longer new tube that has a piece of vacuum hose on it I can't figure out where it connects?

Thanks

 

[RacerX]

You can drill out while attached to manifold, just go slow. Use a bit set in 1/64 increments. Afterward use low pressure compressed air with a rag over the end to catch any bits blown out. There is a slight vacuum in the choke chamber pulling thru the tubes to heat the thermostatic spring to open the choke. The open end of the tube uses a rubber hose to attach it to a hose on the air horn base of the carburetor if I recall.

Here's a pic of a truck connection.

Here's the entire write up.

http://www.ford-trucks.com/forums/806018-choke-questions-answered.html

 

[jeff8877]

RacerX...thanks very much for info.

Here is a pic of my carb and I don't see the air horn where this connects. This is the OEM carb for my car and it looks like only possible spot to connect is at the center back top of carb that has the plug on it? Any ideas or others with a 4V car that can confirm? Thank you.

 

[RacerX]

Basically the open end of the tube connects to atmosphere inside the air filter area. There might be a port on the bottom of your air cleaner housing to connect to.

I have a 4 barrel q code car but it's apart right now.

 

[jpaz]

Here's my carb set-up on my 72 Q Code Mach 1. Hope this helps View attachment 26922View attachment 26923View attachment 26924

 

[jeff8877]

Here's my carb set-up on my 72 Q Code Mach 1. Hope this helps

Thanks jpaz can you show me a pic where the vacuum line plugs in

 

[jpaz]

Here's my carb set-up on my 72 Q Code Mach 1. Hope this helps

Thanks jpaz can you show me a pic where the vacuum line plugs in

Ya, but I'm not sure which one you mean. Here are a bunch of vacuum diagrams. If you need more pics let me know, I have a lot. http://www.mustangbarn.com/72vacuum.html

 

[jeff8877]

See pic...choke tubes attached but don't know where one end plugs in??

Thanks Guys

 

[jpaz]

See pic...choke tubes attached but don't know where one end plugs in??

Thanks Guys

I just sent you a pm