Need advice on installing an oil filter adapter

pishta said

so the new housing and the 20% greater flowing old bolt? Sheesh! I tell you with my 90 adapter and Hooker Super Comps in my 65 A, I still could barely get the oil filter out, and that was juggling it with oil dripping all over the place. I could have went with a smaller filter (smart) or use a filter relocation up onto the fenderwell and never F with that stupid oil filter inside the headers...I did the latter. A good filter with an anti-drainback valve.

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It is interesting the aluminium p-part adapters came with an apparently more restrictive hollow bolt since the target market would include racers taking thier engines to 6000 rpm and more. I suspect it doesn't signifcantly affect flow, and just like everyone else who gets into looking at the passages, I figured why take a chance. LOL. I used an original cast iron adapter and chamfered and smoothed everything.

If you want to see yet another interesting adapter bolt/nipple, look at the ones for marine engines and some slant sixes too. They have spring loaded check valves. I'm sure that's restrictive too. But in my limited experimentation with one, it didn't noticibly impact pressure (and therefore presumbably flow).