Everything you need to know about a dry sump oiling system.

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Ben covers the in's and out's of racing engine lubrication systems...including a high-end "dry sump" package and why it is better than a traditional "wet sump".

EFI University

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Great to see an actual head-to-head dyno comparison. So little of the theory matters if you don't see it there. Nice work. That is a beautiful sump pan and pump setup, too.

bvcxzgt

If you regularly made more of this clear, informative, sub 10 minutes videos, this channel would blow up.. thanks a lot..

temporalmadness

I love human ingenuity, you told me the answers to the questions i didnt realise i wanted to ask.
Cheers guys.

twowheelstouring

Thank you, very well done video. I always wanted to know what the difference was and this video hit the nail in the head!

joedasilva

Great on giving a physical representation on the physical that is use for a wet and dry sump oiling system.

jeromeallisonii

Ring seal information is right on point. However, the argument about the piston having to displace the air from below it is not. As one piston moves down, another moves up and the volume of the crankcase remains constant, so the pistons are moving air around, but not pressurizing it except by blow-by. It is mildly easier to push a piston against a vacuum due to aerodynamic drag, but not due to pumping pressure since the crankcase volume never changes (unless you have a one-cylinder engine or separated cylinders like in some two-strokes). We just aren't reducing pressure enough to significantly reduce aerodynamic drag. Even in the case of a single cylinder, the air pressure in the case would just act like a spring. It would make it hard to push the piston down, but make it easier to raise the piston up, so the pressure would require no net work. With a vacuum in the case, it is easier to get the piston down, but harder to raise it up. The main benefits are ring sealing and making sure the crankshaft isn't having to slice through a reservoir of oil with each revolution. As you mentioned, it also provides better options for oil pressure and volume adjustment, scavenging from every corner of the tank or engine, free range on oil system volume, and, of course, reducing the height of the engine. And no crankcase oil leaks because of the vacuum. :)

bvcxzgt

The description of "pumping loss" starting at 6:00 is incorrect. "Pumping loss" refers to the losses of moving air in and out of the cylinder via the intake & exhaust tracts. Also, if you have an even-cylindered, even-fire engine, there's no internal pumping pressure, because as one piston is moving down, another is moving up in the opposite portion of the stroke.

ShawnD

That is the best explanation of what I have seen for all time.
With real example awesome thanks a lot!

RustamAleksenko

Very informative so thanks for posting. I am configuring my custom 427 Noonan block as a street performance build. The block requires a custom pan, so a dry-sump was a no-brainer. Daily Engineering was my first choice, but like many aspects with a custom build, it's been easier said than done.

DanielOrtegoUSA

Thanks for explaining and showing the difference and why.

TheDragonlair

Great video 'not to technical and not to basic very well presented just easy to watch and without getting a headache 👍

decler-gtnu

The reason I’ve always heard people saying they’re going to a dry sump system was especially if they’re going to be circle track or road racing a car that you didn’t want all of the oil getting thrown to one side of the pan and starving the engine. I know that there are certain kinds of pans that have baffles or you can get a different pick up tube to put on the other side if you’re just going to be running in a circle, but from my understanding, the dry sump is the king when it comes to protecting yourself from oil starvation.

wbmgr

Thank you so much. I've always wondered what those huge cans were for sitting next to the fuel cell of many races/drag cars. Now I know.

JavierTorres-pyrp

I know I’m a year late but I’m still a new subscriber thank you for that information hands-down

jimroger

Great video. One comment is while that I agree the vacuum in the crankcase will improve piston ring sealing, however, at some point the frictional losses of the piston rings rubbing against the cylinder bore will negate the benefit of a better seal. Obviously, you will have to optimize your piston rings based on how much vacuum you get in the crankcase.

rocketscience