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DIY Dry Sump System


Here I’m going to describe how to build your own dry sump system on the cheap.

Parts List
-second hand dry sump pump or two
-a dry sump tank (if your ally welding is as bad as mine).
-oil hose
-various hydraulic fittings
-crank cam belt pulley

Tools List
-Lathe

You will need to modify the sump of your engine to become a dry sump. To do this cut the bottom off the sump so that it looks like the roof of a house with no roof on. If you know what I mean.

Then bend a piece of sheet metal so that it covers the large hole you cut in the sump. Make sure you bend a gutter into the middle of it. This is where the oil will drain to and be sucked out to the tank in the boot.

You will then need to fashion a crank scraper / baffle to cover the gutter this should be welded closed on one side and have a small gap (about 1cm) on the other. The side that is open needs to be facing the rotation of the crank so that as it swings round the oil is flicked off into the gutter (do not get this wrong).

Next weld the bottom of the sump onto your cut up sump.

Then drill 2 or more scavenge pick ups onto the gutter. I recommend 4 as you can always blank them off if not needed. Locate more towards the rear as this is where the oil will collect during acceleration. The pickups I used where simply pipe joiners (female – female) then you can screw you hose tail into them.
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The Hose tail is important as you will need to solder a brass mesh filter into the end to prevent and metal particles from entering the pump, in the event of a turbo failure etc.

Next mount the dry sump pump on the side of the engine. If you need more pumping power you can join 2 or more by making an extra long driveshaft. I used a ½” extension bar as this was made from forged steel and was very strong. This was then lathed down to fit exactly into the housings. To connect the drive I used an old crank cam belt pulley and welded it to a flange which I then lathed to suit the crank pulley on my car. Make sure you get the pitch of the teeth right so that it will mesh correctly with the belt. I found that an old pinto pulley worked well.
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Now install the tank and external oil filter. You can also add an oil cooler but this is not really necessary as the tank will aid cooling.
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To connect to the engine I removed the oil filter inlet and used hose tail that bolted straight in. You will also need to do away with your dipstick as this is not needed.

When plumbing it together. I used 2 pump bodies to put the oil in and 3 to scavenge it out. I ran 3 pipes to the back. 2 to supply the oil and one to return. This aids with the oil pressure. Do not connect the vents off of the dry sump tank to the engine. These need to exit into either the exhaust system or into a catch can and vent off to atmosphere as the dry sump scavenging effect also pumps air to the tank in the boot which helps increase engine vacuum pressure.


9 Comments

Pete.

I fucking love you.

Pete.

I fucking love you.


Agreed, you're my fucking hero dude :D
Cheers man, You should add a technical articles section on the site were we can put stuf like this and the post i saw about about spark plugs etc.
It's on my to do list buddy :)
This is very cool indeed :)
I have to say, not something I would attempt unless I absolutely had to!
Pete...for the sake of this thread/article...perhaps a few of your own words to the points/advantages of why you would go to dry sump :)
No problem.
The reasons you would go for a dry sump system are:
-You dont have enough room in your engine bay whilst doing an engine transplant so you need to make the sump as small as possible (this is why I did it)
-You experience oil starvation problems, you may get this when you are drifting, or racing as the oil sloshes to one side away from the pickup. Where as in a dry sump system the oil pump is always fed with a constant de-airated supply of oil.
-You wish to lower your engine to lower the center of gravity for racing applications.
nice one :-)
High five dude, seriously... loving the articles and your prompt answer's to your reader's questions...

I'm going to crack on with promoting this stuff to the world very shortly :)
Nice one pete :) that engine is one of the coolest looking things int he world!!!!