This'll get you started:
http://www.gti16v.com/tb879503.htm

If you know or can find the capacity of the Suburu compressor you should be
able to get into the ball park from there. If you're going to these lengths
I'd suggest doing it according to Hoyle, which means a proper flush, the
proper dryer, new o-rings, etc. IIRC there's a retrofit expansion valve for
the vanagon for R134a- some people seem to have gone without it, but if you
can do it, why not?
I guess I don't understand why you'd have hoses made that required
splices... however I have no experience with those so I'll leave that one
be.

Good luck,
Robert

----- Original Message -----
From: "Warren Lail" <wlail@OU.EDU>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Thursday, June 22, 2006 5:21 PM
Subject: air conditioning

> Greetings Lubbers,
>
> Some of these questions have been asked on the SubaruVanagon list so I
> apologize for the cross-post.  However, I have more questions.
>
> I'm about to connect the air condtioning on Billy Bones.  I recently
> converted to a 2.2 subie engine and today I had hoses manufactured to
> splice into the Vanagon AC system.  Several questions:
>
> First, the Subaru compressor runs R134a.  The Vanagon ran R12.  Should I
> flush the system before re-charging it?
>
> Second,  the guy who made my hoses left one end "open" so that I can
> splice them to the VW system.  I will be using dedicated air-conditioning
> splices and clamps.  Does anyone have any experience with splices in the
> AC system? (good or bad)
>
> Third, do I use Ester or PAG oil to put into the system?
>
> Fourth,  how much of that oil do I use?
>
> Fifth, I intend to install a new receiver/dryer.  Can I just use a generic
> one that is about the same size?
>
> Thanks in advance!
>
> Warren L.
> 88 Westy "Billy Bones"