More stupid AOS talk...

[Smallblock454]

Hello,

does anybody know the inner diameter of the vacuum lines needed?

In general these hoses have to be fuel and oil resistant. So i would think more something like fabric reinforced fuel lines. Also had the idea of silicone lines, but silicone seems not to be oil and fuel stable. Also it has to be ethanol stable.

Regards, Markus

[Gelbster]

Great suggestion Markus.
Silicone hose in the larger diameters for connection to a pcv tends to collapse when warm and under high vacuum at idle.Bends will kink. For that reason it will fail the Smog Test here if a tech sees the vivid color of aftermarket silicone hose.

You are correct, here is a fiber wall reinforced version but that helps with pressure ,not vacuum.
One solution may be to select thick wall/heavy wall silicone.It is so much easier to work with than the stock "plastic". I found some with a 3mm i.d. and 8mm o.d. Turbosmart TS-HV0303-BK
3m Pack-6mm Vacuum Tube Reinforced - Black
Normal wall thickness would be 1.5mm.This item is 2.5mm.Should help??
One complication is that silicone is very elastic so you usually buy it 1mm smaller i.d. than the 'plastic' OEM style tube.
Note that the silicone hose manufacturers seldom specify a wall thickness and tend to use hyperbole like "turbo" ,'platinum cured' ,so it can be difficult to find a truly premium product.

[JFP in PA]

Originally Posted by Smallblock454

Hello,

does anybody know the inner diameter of the vacuum lines needed?

In general these hoses have to be fuel and oil resistant. So i would think more something like fabric reinforced fuel lines. Also had the idea of silicone lines, but silicone seems not to be oil and fuel stable. Also it has to be ethanol stable.

Regards, Markus

Only problem is that the AOS unit uses "click on" hose ends which are vastly more failure prone than the hose itself:

[Nine8Six]

Originally Posted by Smallblock454

Hello,

does anybody know the inner diameter of the vacuum lines needed?

In general these hoses have to be fuel and oil resistant. So i would think more something like fabric reinforced fuel lines. Also had the idea of silicone lines, but silicone seems not to be oil and fuel stable. Also it has to be ethanol stable.

Regards, Markus

Just saw this thread, brilliant idea from Stelan, a new-must for the corner-heavy track I'm assuming.

@Markus - the material you are looking for is called composite for hydrocarbons. "Composite Hose for Hydrocarbon" (Schlauch für Kohlenwasserstoff) for instance should return data from your nearest hardware supplier.