Date:         Tue, 14 Jun 2005 09:47:25 -0700
Reply-To:     Michael Elliott <j.michael.elliott@GMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Michael Elliott <j.michael.elliott@GMAIL.COM>
Subject:      Re: Vacuum from Brake Booster?
Comments: To: John Bange <jbange@gmail.com>
In-Reply-To:  <6da5793405061408197bf11947@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

On 6/14/2005 8:19 AM John Bange wrote:

>The intake manifold seems to be just a big hollow can, so
>theoretically the brake booster's as good as any other spot. The only
>caveat is that a break in that large line will probably cause you to
>suddenly lose engine power AND revert you to non-power disc brakes. I
>personally would tee off the fuel pressure regulator connection point
>and run a separate line up, but I've already got the grill, fuel tank,
>tranny, and engine out of mine, so to me it sounds easy (pulling the
>plastic coolant lines to re-seat the metal inserts took me five
>minutes).
>
>
Okay, well if that manifold (which looks like a spleen or something to
me) is just a big ol' can, then any break in a line would create a
significant vacuum leak. Check valves at points of exit would be smart,
and VW did indeed put one in the brake booster line before it exits the
engine compartment and heads forward. The fuel regulator hose is short
so they probably figured that if it was starting to run into trouble,
the observant owner would spot it and replace it.

I don't yet have the i.d. of either of those two lines, but it's
probably around 1/2''  (12 mm or so -- does someone have an ETKA?). I
know that the line that will go to my cruise control's vacuum reservoir
can has an i.d. of .200'' (5mm).

You know what I'm having a surprisingly difficult time finding? A barbed
reducing tee to put into either the brake booster line or the fuel
regulator line. 12mm-ish input and output, and side branch of 5mm.

And check valves -- where's a good place to find one? I don't have any
boneyards within a 2-hour one-way drive from here.

--

Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
83.5 Westfalia: Mellow Yellow ("The Electrical Banana")
KG6RCR

>
>
>>Along these lines, does anyone have any wisdom regarding whether
>>stealing vacuum from the brake booster hose is any better or worse than
>>stealing it from the fuel regulator vacuum hose? Do they go to the same
>>place inside that bagpipe-shaped throttle body thing on top of the engine?
>>
>>
>>
>
>
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