I currently have an Earls -12 filter between the pickup and pump, But am concerned about any restriction since I have been having trouble with low oil pressure. The screen in the Earls filter is flat, not conical like it could be made for max filter area. What experience have you had with pre pump filters? I caught that mention of a pre filter for a dry sump from Monte, and hope that has a bigger filter area along with a good sized screen. Any other filters out there that offer very low resistance to flow?

I see Canton makes a -12 6.75 long filter, uses a course screen in the shape of a tube. Looks good, just a problem plumbing it.

I use a Peterson filter. I believe it is made for a dry sump system, on the scavange side. It has a removeable/cleanable cone shaped screen. I run a single line system and have no trouble with oil pressure, running 1/4 mile, near 7000 rpm's in the lights.
I usually check this filter when I do an oil change.
Brian

I have the dual line with 2 Peterson filters. no problems

I have 2 for years,not your problem

Thanks. I like the look of the Peterson , should have enough flow for my deal

After snapping a few pump drives and nearly killing a few engines (amazing how long it takes to learn some things) I fitted an inline -12 cone style filter, sorry can not remember the name, next oil change the bottom of a valve spring 1/2" long fell out of the filter. A must they are !!!

I had Jeff Johnson build me a 10 quart SS type oil pan for the B1 motor I built last year to fit into a stock motor location for a 1963 Plymouth Fury, he recommend two in line screen type cone filters that fit inside the line to the oil pickup I can dig out that companies name and contact info in SO CA if you want it

I use these type strainers that fit in the line fitting. Much cleaner, less bulky, less weight and less fittings this way. Also cheaper and less chance of leaks. My motors turn 10000 rpms and use a single line pick up wet sump just like you.
Link

The type of pump affects how sensitive it is to debris.
Scroll & rotor pumps won't tolerate anything, twin gear pumps can ingest 1/16" pieces since there is always space between the gears. For those not familiar (despite some internet diagrams) oil is not pumped between the mating gear teeth, but is captured in the root space between teeth and the pump cavity wall; this space never changes size.

I would appreciate that, Cab.!