Hosing for Boost control and Pop Off Valves

[Ian H]

Hi
Does anyone know a source for the hosing that comes off the bottom of the Pierburg Valve (hose 4 on diag. ). It seem to be 6.5mm id with a re inforcement core running through it. I assume it is under some reasonable pressure to open the turbo waste gate although it does goes through a reducer to some flimsy looking hose (hose 8 on diag.)which comes out of the unit itself. I have found some 5.5mm vaccum hose but I now think it should be much stonger pressure hosing? I am really not sure how this Pierburg functions?

Similarly I was looking to replace the rubber pop off hosing (hose 8 on 2nd diag) which presumably is a vaccum line to open the pop off valves? Will my 5.5mm vacuum line be suffcient for this?

Many thanks
Ian

 

[DLax69]

Gotta imagine any silicone hose of the right diameter would work in that application...

 

[Ian H]

Yeah bit nervous I don’t mix up pressure and vacuum hoses
also recently got a silicon replacement for my sons Triumph spitfire radiator hose which didn't have the embedded strengthening cord and it split within 2 months!
can see for the pierburg there is at least one layer of this cord

 

[conaero]

I’m with Dlax silicone should be fine it will be listed on eBay as silicone boost pipe. Prob get some standard thicker rubber too it will be cheap.

 

[Ian H]

Great many thanks
Can I use same stuff for boost and pop off lines given I assume one is vacuum and one pressure line?

 

[Oneball]

The boost control valve is operated by turbo pressure.
The blow off valve tubing is subject to pressure and vacuum.

If using a silicone pipe for vacuum it must be rated for vacuum, it will collapse if it is not.

 

[DLax69]

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Leftpondia, but you will get the idea