Air line to tranny
Thread Starter
Instructor
Joined: Oct 2008
Posts: 178
Likes: 1
From: windsor ontario
Air line to tranny
Right now the line leaving my intake is metal that goes to my tranny and I want to make it rubber ..is there any problem with this.I am changing to a Holley and want to cot the metal lin and install a rubber line and clamp it over the cut portion going to the transmission.
Pro
Joined: Jul 2005
Posts: 517
Likes: 7
From: Peoria IL
Yes, the rubber line can collapse and the vacuum signal to the transmission is reduced.
It happened to me, keep the steel line. You can make a new one in a different shape if you want, but a rubber line to the vacuum modulator can give you trouble.
It happened to me, keep the steel line. You can make a new one in a different shape if you want, but a rubber line to the vacuum modulator can give you trouble.
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
You can use short runs of sturdy vacuum hose between components and the hard metal line, but as mentioned above, soft line that long can collapse and provide no vacuum to the vacuum modulator on the tranny. Bend the line or cut as necessary to make the hookup.
Burning Brakes
Joined: Jun 2008
Posts: 1,086
Likes: 1
From: Michigan
I have a vacuum hose as well and have been meaning to change it to pipe. I was thinking of using brake pipe and bending it myself. Would this work and would I have to fill it with sand before bending to prevent kinking?
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,114
From: Crossville TN
You only need to buy an inexpensive [small] tubing bender [$5-10 ?] at the hardware or auto parts store. The kind I'm talking about has two different sized circular bending tools...one on each end of a plate. You can make about any kind of bend with it when using small tubing.
Brake line tubing or fuel line tubing will do the job fine.
Brake line tubing or fuel line tubing will do the job fine.
Safety Car
Joined: Mar 2009
Posts: 3,558
Likes: 4
From: Oakland California
As long as you get the correct rubber hose you'll be fine. I've been running two rubber hoses with my TH350 in my Camaro and have never had a problem with it. It's been about two years now. I got my rubber hoses at kragen, make sure they're transmission hoses or else you'll have problems
, I got one going to the vacuum modulator, and another one for the oil line. I can't remember if it's on the return line.
, I got one going to the vacuum modulator, and another one for the oil line. I can't remember if it's on the return line.
Pro
Joined: Jul 2005
Posts: 517
Likes: 7
From: Peoria IL
Brake line, copper line, aluminum line, any rigid line will work fine really. Get at least 3/16" tubing if you're going with copper since the walls are thick, but 1/8" brake line would work just fine too.
You can fill the line with sand if you want, but I wouldn't because I wouldn't want any to get stuck until you install it and then have it break loose later and end up going down your intake just to get lodged between your piston and the cylinder wall like a nice little cutting tool. Use a bender, they're not expensive and you need one anyway.
You can fill the line with sand if you want, but I wouldn't because I wouldn't want any to get stuck until you install it and then have it break loose later and end up going down your intake just to get lodged between your piston and the cylinder wall like a nice little cutting tool. Use a bender, they're not expensive and you need one anyway.
