[Vwdiesel] What type of preasure tube to run from intake manifoldto VDO boost guage

[Roger Brown]

82 Diesel Westy wrote:
> 
> Hi, just got my new boost gauge.  Of course they don't
> specify what to use for the pressure line back to the
> intake manifold from the dash.
> 
> Seems there are also 2 types of boost gauges, one that
> works off of vacuum and one that works off of
> pressure.  I have the pressure VDO gauge.

Same gauge actually, for a gas/turbo you would have a vacuum/boost gauge
since a gas engine would have manifold vacuum under light loads,
pressure under boost.  A diesel/turbo only really needs a boost gauge as
there is normally not an intake manifold vacuum.  A boost only gauge
would give you the most accuracy on the gauge since the entire sweep of
the needle is boost, instead of having 1/2 the sweep devoted to vacuum.

> I have seen people use stuff similar to what you would
> run for a refrigerator water line, but smaller.
> Any idea what the outside diameter is and where to get
> it, plus the fittings.  It this common plumbing stuff?

You might check the VDO install instructions:
	http://www.egauges.com/pdf/vdo/0-511-011-795.pdf

-- 
   Roger