I got lots of great input from the sandwich adapter thread
http://theoildrop.server101.com/forums/s...ge=2#Post605626
but thought I'd report my install here because what I did is similar to some of the ideas in this thread.
I installed a Balwin OB1305 mount with BT341 (short version of B50/B164) on a 2001 Subaru Forester with 90K miles. I tapped the supply from an unused block plug and returned to the oil filter cap. Here's how I got to this setup - BTW, I know there are plenty of you who will take issue with my reasoning - but here goes.
First, I choose the Balwin gear based on fit and being adequate for my purposes. In the space I chose to mount the filter, the Amsoil filters were too long, by about a half inch, and the oilguard and motorguard units had install geometry problems also. The Balwin unit fit nicely. My purpose was only to comfortably (my comfort) extend the OCI with synthetic oil to one year on a car that goes about 10-12K per year, without the bother of UOA (I know many of you don't consider UOA a bother - I do).
Second, I tapped the unused block plug for the supply because I thought it would make a neat install, without the need to tamper at all with the FFF. It worked, but if I had known what a PITA it would be to install, I would have used a sandwich adapter for the high pressure supply. I didn't use a sandwich adapter supply and return because the BT341 has a built in pressure drop orifice and Balwin claims it is designed for the full pressure drop.
Third, I returned to the oil filler cap because it was convenient and is a long way from the PCV valve. It also created the unexpected (to me) benefit of being able to lift the cap and see the flow rate (which looked about right to me)
Costs:
1. Mount and filter- $30 at local fleet supplier
2. Amsoil BP89 oil cap return- about $8 (minimal shipping cost because I combined with other stuff in the order)
3. Block plug adapter from WRXTRA- $30 including S&H
4. Hoses (42" and 33", 2700 psi hose) and fittings - $65 from local hydraulic supply house. This was probably more than I needed to spend, but I was having trouble finding what I wanted on-line, so spent the money at the local shop to just get something I knew would work.
5. Research and install - countless hours (but I could do the next one in a couple of hours including the shopping)
Total cost = $133 (including MA tax at 5%). I had been hoping to get by for about $100, but spent twice what I planned on the hoses and fittings.
Sorry for the long post. I'll put pictures in another post - I forgot to get them onto a URL before starting this one.