Does anyone know the diameter of the booster vacuum tube under the car? Mine has been removed and I need to replace it so i can have boosted brakes again. Also, if you know the length of the tube that would be a great help!
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It is a 5/8" od tube. Length, I don't know. I replaced mine with stainless and -10 hose.
You could just run -10 hose the entire length and not worry about it.
You could just run -10 hose the entire length and not worry about it.
Thanks,
Some people have told me that without a solid line under the car, the hose could collapse. But that makes no sense since we have hose on both ends! Hmmm
Some people have told me that without a solid line under the car, the hose could collapse. But that makes no sense since we have hose on both ends! Hmmm
Makes no sense to me either.
Maybe they were trying to use fuel hose etc that wasn't designed as vacuum hose.
Maybe they were trying to use fuel hose etc that wasn't designed as vacuum hose.
If you use a rubber heater hose it can collapse, sure.
If you use an "aeroquip" type -10, braided stainless fabric ovewr rubber, no it will not.
It is actually an easier installation to use about 48" long of tubing with hose on either end.
There is already a provision in the chassis, bulkheads, for the tube to run through and be supported just like the radiator tubes are.
Hose of the same size is larger OD then the tube because 5/8" hose is 5/8" ID, inside diameter.
Tube size is designated by the OD of the tube. Pipe, which we are not talking about here is designated by the size of the hole in the pipe, ID.
Almost all automotive applications are tube size, including exhaust tubing.
Hose is intended to fit over tubing, not pipe. Therefore the inside diameter of a 5/8 hose will be 5/8" (+/-). The OD of a 5/8" hose is going to be around 1". Therefore it isn't going to fit through the holes provided by Detomaso through the bulheads for 5/8" tube.
On A/N hose (army/navy) sizes are designated in dash sizes. Every dash increment is equal to 1/16". A dash size such as a -10 is stating that the hose is 10/16" or 5/8"
When someone says use a -10 hose it is an A/N specification hose 5/8" inside diameter.
I hope this helps, even though it might not have been what you are asking for.
If you use an "aeroquip" type -10, braided stainless fabric ovewr rubber, no it will not.
It is actually an easier installation to use about 48" long of tubing with hose on either end.
There is already a provision in the chassis, bulkheads, for the tube to run through and be supported just like the radiator tubes are.
Hose of the same size is larger OD then the tube because 5/8" hose is 5/8" ID, inside diameter.
Tube size is designated by the OD of the tube. Pipe, which we are not talking about here is designated by the size of the hole in the pipe, ID.
Almost all automotive applications are tube size, including exhaust tubing.
Hose is intended to fit over tubing, not pipe. Therefore the inside diameter of a 5/8 hose will be 5/8" (+/-). The OD of a 5/8" hose is going to be around 1". Therefore it isn't going to fit through the holes provided by Detomaso through the bulheads for 5/8" tube.
On A/N hose (army/navy) sizes are designated in dash sizes. Every dash increment is equal to 1/16". A dash size such as a -10 is stating that the hose is 10/16" or 5/8"
When someone says use a -10 hose it is an A/N specification hose 5/8" inside diameter.
I hope this helps, even though it might not have been what you are asking for.
Exactly Doug ... you need a reinforced hose .. because your pulling about - 10lbs of vacumn. The hose will collapse ...and where it it subject to heat... that makes it more likely. I suggest a nice SS hose ... looks like 3/8 ID or aprox 5/8 OD.
This really is great info to at least understand what A/N stands for and the sizes of hoses and tubes! Thanks. Of course I still have questions. The hole under the car is for a 5/8" tube.Meaning the I.D.is smaller. To that I can attach a 5/8" hose. Meaning 5/8" I.D. Is that a little large for the hose end? I have fittings from the intake and the booster side that will accept 3/8" hose so I should use 5 feet of 3/8" tube as a hard line under the car? Is that too small I.D.? TIA
3/8 is probably ok. It's just for the brakes.
I used 5/8" od ss tube and -10 Russell ss hose.
I believe that the factory banjo on the booster is for 5/8 hose (inside diameter).
By process of elimination the intake fitting must be for 5/8" hose also.
Since I never had the original intake manifold on this car, it was an Edelbrock when I first got it, and it has Webers on it now. I don't know what the original factory connection looked like.
I used 5/8" od ss tube and -10 Russell ss hose.
I believe that the factory banjo on the booster is for 5/8 hose (inside diameter).
By process of elimination the intake fitting must be for 5/8" hose also.
Since I never had the original intake manifold on this car, it was an Edelbrock when I first got it, and it has Webers on it now. I don't know what the original factory connection looked like.
Thanks for this info. I'm going to go with the 5/8" tube and change my intake fitting to accept the 5/8" hose, and I'll check the booster. Great help on this!