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Dry sump question

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Old 01-27-2007, 12:54 PM
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Dry sump question

I'd like to ask for some info on dry sump systems used. How much does it lower the engine? Is OEM sump 1.5" tall?

Thank You
Ted
Old 01-27-2007, 01:10 PM
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I havent seen it instaled on an 8 yet but we have a complete dry sump settup for the renissis for the diasio. You can call Cam about that at Pettit, or ill ask him any questions that you have. Im shure you can drop the motor 2 inches if it will fit.
Old 01-04-2008, 12:58 PM
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Hi, Question about the Dry Sump.

In germany, they built a 2006 MX-5 with a Renesis. They said one of the hassles to get over was the fact that the drive shaft that was usually at the bottom of the stock engine was now in the middle of the Renesis. Thus, not having a lot of clearance.

Where is the oil pan on a Renesis? Would adding a Dry Sump, and thus getting rid of the oil pain, help with the clearance?
Old 01-05-2008, 04:23 AM
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When you dry sump a rotary motor you basically remove the oil pan/sump and place a flat plate usually around 1/2 inch or even thicker on the bottom of the motor. That enables you to lower the motor in the chassis which in turn lowers the centre of gravity.
Old 01-05-2008, 07:54 AM
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i would suspect a dry sump oil system is like that of the zo6's... there isnt an oil pan at all which allows the motor to be placed lower....

but for further explination and exerpt from wiki

A dry sump is a lubricating oil management method for four-stroke and large two-stroke piston internal combustion engines that uses a secondary external reservoir for oil, as compared to a conventional wet sump system.

Four-stroke engines are lubricated by oil which is pumped into various bearings and thereafter allowed to drain to the base of the engine. In most production cars, which use a wet sump system, this oil is simply collected in a three to seven litre capacity pan at the base of the engine, known as the oil pan where it is pumped back up to the bearings by the oil pump, internal to the engine. In a dry sump, the oil still falls to the base of the engine, but rather than being collected into an oil pan, it is pumped into another reservoir by one or more scavenger pumps, run by belts from the front or back of the crankshaft. Oil is then pumped from this reservoir to the bearings of the engine by the pressure pump. Typical dry sump systems have the pressure pump and scavenger pumps "stacked up", so that one pulley at the front of the system can run as many pumps as desired, just by adding another to the back of the stack.

A dry sump affords many advantages, namely increased oil capacity, decreased parasitic loss and a lower center of gravity for the engine. Because the reservoir is external, the oil pan can be much smaller in a dry sump system, allowing the engine to be placed lower in the vehicle; in addition, the external reservoir can be as large as desired, whereas a larger oil pan raises the engine even further. Increased oil capacity by using a larger external reservoir leads to cooler oil. Furthermore, dry sump designs are not susceptible to the oil starvation problems wet sump systems suffer from if the oil sloshes in the oil pan, temporarily uncovering the oil pump pickup tube. Having the pumps external to the engine allows them to be maintained or replaced more easily, as well.

Dry sumps are common on larger diesel engines such as those used for ship propulsion. Many race cars, supercars, and aerobatic aircraft also utilize dry-sump equipped engines because they prevent oil-starvation at high g loads and because their lower center of gravity positively affects performance.

On the downside, dry sump systems add cost and complexity, and the extra pumps and lines require more oil, so maintenance costs go up as well.
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