The Ford Barn

chucksue · 05-11-2014, 02:05 PM

What should be the size of the vac. lines that go to the rear axle canister.

G.M. · 05-11-2014, 03:14 PM

3/8" ID !/2" Id would even be better for good crisp shifting into Columbia. The reason I say 1/2" might be better is I mounted the shift valve back closer to the rear on several vehicles. Even though the standard front mount shifts good the rear mount seems better. G.M.

Dave D · 05-11-2014, 03:35 PM

Make sure you have the proper carb adapter for the vacuum. DON'T use the ones from the Southwind heaters!!

blucar · 05-12-2014, 09:28 AM

The stock Columbia lines are steel 3/8" running through the frame..
Short sections of rubber hose attaches to the shift valve and to the vacuum canister on the Columbia axle..
Lines larger than 3/8" might not work as well. I try to live by the rule; don't try to re-invent the wheel. if 3/8" was good enough for the Columbia engeeers, why change it..
I would also think that it would not be to good of an idea to use all rubber hose in lieu of steel.. The rubber hose might have a tendency to loose vacuum pressure due to wall collapse.. Vacuum pressure differs from pumping pressure, the later can expand the hose..

chucksue · 05-12-2014, 12:43 PM

My plate under the carb is real thin. About 3/8 or 1/2 inch thick. The line coming from it is 1/4 " copper. I don't know what a southwind plate looks like. I remember the heaters but not the plate.

37 Coupe · 05-12-2014, 02:38 PM

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That sounds like a Southwind vacuum plate. The Columbia plate is probaby 1/2" thick and a 1/4" pipe tapped hole for the brass fitting with 3/8 " o.d.tubing. At least on the original Columbia one picture hopefully shows.

37 Coupe · 05-12-2014, 02:50 PM

Mayby Columbia plate will show now.

chucksue · 05-13-2014, 11:34 AM

Mine sure doesn't look like that. I am going to a swap this weekend maybe I will find one or as I have done in the past make one.

05-11-2014, 02:05 PM	#1
chucksue Member Join Date: Nov 2013 Location: central illinois Posts: 39	columbia rear axle What should be the size of the vac. lines that go to the rear axle canister.

05-11-2014, 03:14 PM	#2
G.M. Senior Member Join Date: May 2010 Location: Florida and Penna. Posts: 4,471	Re: columbia rear axle 3/8" ID !/2" Id would even be better for good crisp shifting into Columbia. The reason I say 1/2" might be better is I mounted the shift valve back closer to the rear on several vehicles. Even though the standard front mount shifts good the rear mount seems better. G.M. __________________ www.fordcollector.com

05-11-2014, 03:35 PM	#3
Dave D Senior Member Join Date: May 2010 Posts: 290	Re: columbia rear axle Make sure you have the proper carb adapter for the vacuum. DON'T use the ones from the Southwind heaters!!

05-12-2014, 09:28 AM	#4
blucar Senior Member Join Date: Jul 2010 Location: Ventura, CA Posts: 2,464	Re: columbia rear axle The stock Columbia lines are steel 3/8" running through the frame.. Short sections of rubber hose attaches to the shift valve and to the vacuum canister on the Columbia axle.. Lines larger than 3/8" might not work as well. I try to live by the rule; don't try to re-invent the wheel. if 3/8" was good enough for the Columbia engeeers, why change it.. I would also think that it would not be to good of an idea to use all rubber hose in lieu of steel.. The rubber hose might have a tendency to loose vacuum pressure due to wall collapse.. Vacuum pressure differs from pumping pressure, the later can expand the hose.. __________________ Bill.... 36 5 win cpe

05-12-2014, 12:43 PM	#5
chucksue Member Join Date: Nov 2013 Location: central illinois Posts: 39	Re: columbia rear axle My plate under the carb is real thin. About 3/8 or 1/2 inch thick. The line coming from it is 1/4 " copper. I don't know what a southwind plate looks like. I remember the heaters but not the plate.

05-12-2014, 02:38 PM	#6
37 Coupe Senior Member Join Date: May 2010 Posts: 1,835	Re: columbia rear axle Sponsored Links (Register now to hide all advertisements) That sounds like a Southwind vacuum plate. The Columbia plate is probaby 1/2" thick and a 1/4" pipe tapped hole for the brass fitting with 3/8 " o.d.tubing. At least on the original Columbia one picture hopefully shows. __________________ "Never complain,never explain"... Henry Ford II Last edited by 37 Coupe; 05-12-2014 at 02:46 PM.

05-13-2014, 11:34 AM	#8
chucksue Member Join Date: Nov 2013 Location: central illinois Posts: 39	Re: columbia rear axle Mine sure doesn't look like that. I am going to a swap this weekend maybe I will find one or as I have done in the past make one.