I don't see any problem using a filter that has a bypass valve with the adapter that also has a bypass valve installed.
You get double the protection. A WIX filter 51515 will bypass 2-4#s before the Lycoming bypass.
...which protects the filter (i.e. prevents element crush), but not the engine. I'm thinking about startup with 50W viscosity.
The 51515 performed well in the filtration test, but I'm sure there are choices with similar or better performance,
and better physical specs. Already pointed a few with significantly higher can strength and bypass values closer to Lycoming spec. There's a subtle aspect to a filter designed with a higher internal bypass pressure rating...the element and core tube must be stronger. I'm looking around, as are others.
Break.
Need a no-bypass filter (48110 substitute) for use on the Lycoming adapter? Look at a 51647. 390 burst, decent beta values. Not endorsement, but a good candidate.
About those beta ratios. So far I've been expressing filter efficiency in percentages, as everyone understands percentage. They can also be expressed as a beta values. Beta can be understood as "given this many particles, one gets through". Wix generally publishes a dual beta, but the format is a bit whacky. Rosetta Stone below.
Note Wix claims a 2 beta, i.e. 50% at 6 µm, but our 51515 results show 10% at 6 µm. Likewise, a 20 beta is 95%, but our results show 78%
average at 20 µm. It is pretty close to 95% for a brand new clean filter. Point is, the actual values are good, but they're not what Wix is claiming.
Wix 4548-12 efficiency values. Microns at top, table in percentages.