Engine experts, Oil pump and pressure Options

[r_towle]

I’m going to build a flat 8.
Not asking to debate this, but it’s the premise of my current research.

In the only successful motor built like this, in Brazil in the 70s or 80s, they had issues getting oil at sufficient pressure to the crank/valves furthest away from the pump.

So, I have two ideas.
If you look at the 911, there is an external oil feed pumping oil into the valve train.
I’m thinking of something like that, but not sure how to route it, or the right place to inject oil ….maybe at the beginning of the second case….or the other end and feed it backwards.

Or
I could enlarge the internal oil galley in the first motor to increase volume.

I expect I will need to find the highest volume pump I can.
I assume different pressure relief valves.
I assume eternal oil cooler and filter.


The rest of the architecture looks fairly straight forward.
I need help, experience, and some hotrod thinking on the oil issue.

[fixer34]

So the first picture looks like they just bolted 2 engines together, nose of one to the flywheel end of the other. Each case in that situation has its own oil system.
I'm guessing you are going for the second picture where you weld 2 cases together with a filler piece from a third.
Happened to be at an indoor sport complex today and saw exactly what you need to deal with. The overhead ventilation system starts with a very large pipe and then gradually decreases in size as it extends further into the building.
The question is, can you increase the pump intake, flow, and size of the front block oil galleries/passages enough? They are what, 11-12mm now? Rough calculations (area) you need to enlarge them to about 17mm.

[r_towle]

So the first picture looks like they just bolted 2 engines together, nose of one to the flywheel end of the other. Each case in that situation has its own oil system.
I'm guessing you are going for the second picture where you weld 2 cases together with a filler piece from a third.
Happened to be at an indoor sport complex today and saw exactly what you need to deal with. The overhead ventilation system starts with a very large pipe and then gradually decreases in size as it extends further into the building.
The question is, can you increase the pump intake, flow, and size of the front block oil galleries/passages enough? They are what, 11-12mm now? Rough calculations (area) you need to enlarge them to about 17mm.

Getting closer.
What are the inputs to know what is correct?
If you notice the last picture, this is 1/2 of the welded case while they were trying to figure out how to increase oil pressure .

External, dry sump, can be done
External pump, ok
External cooling ok
Now where to inject oil….hmm