PROJECT S2000 TECH STORY ANDREW WOJTECZKO PHOTOS SCOTT PHILIPPS AND ANDREW WOJTECZKO

Designing a Dry- Oiling System Reliable oil supply, lower CofG, with an increase in horsepower

ry-sump oiling sys- dry-sump system. Because the bulk of tems o er numerous the engine oil is no longer being stored advantages, including in the sump of the oil pan, the pan can Dimproved engine reliability be very shallow, allowing our engine to and longevity, the ability to lower the sit 1.25 inches lower. engine for improved handling dynamics Scavenge stages built into the oil while reducing pressures, pump evacuate oil from the pan and and the possibility of an increase in create a vacuum in the crankcase. This power output. vacuum ensures no more issues with The improved reliability comes from excessive crankcase pressure lling the remote-mounted oil reservoir, up catch cans when on track. Finally, which is designed to be tall and slender, power gains are often seen as a result ensuring that no matter how much of the vacuum generated in the pan lateral or longitudinal acceleration is causing an improvement in ring The ARE generated, a fresh supply of air-free oil sealing and reduced friction. Gains of 3 Engineering), a leader in dry-sump kit includes is always being fed to the engine. Con- to 5 percent seem to be reasonable. engine system development and manu- everything you stant oil supply means reduced bearing Scouring the Internet reveals limited facturing, to develop a dry-sump setup ne d (les hoses wear and increased engine longevity. options when it comes to dry-sumping speci cally for F20/F22C engines in an and fi tings) to The ability to lower the engine in the an F22C in an S2000. Consequently, S2000 engine bay, we jumped at it. The dry-sump your bay is a result of the shallow-depth pan when the opportunity arose to ARE pan design features two screened F20/F2C. design that can be tted when using a work with ARE (Armstrong Race -10 scavenge ports and a dedicated

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MODP-130800-S2K.indd 68 5/24/13 11:12 AM The rear-mounted oil swirl pot helps improve rearward weight distribution compared with mounting under external pump. Speaking of the exter- pulley is a direct replacement part. the hod. nal pump, it’s also an ARE product—a The kit comes with the necessary three-stage dry-sump pump. On the and gearing con guration for the pump, you will nd two scavenge inlets S2000, with belt tension being set by that are fed from the pan, a scavenge using shims under the pump. Our low- outlet, which feeds oil to the remote ered engine con guration resulted in tank, a pressure inlet, which receives oil some clearance issues to the steering from the remote tank, and a pressure rack, requiring machining of one rack outlet, which supplies oil to the engine mounting ear and the use of a slightly inlet. narrower 0.75-inch drivebelt. Fitting The remote tank is also manufac- the tank is a challenge in anything but tured by ARE and is a lightweight a dedicated race and will require piece of aluminum art. This tank uses some fabrication to properly secure. extensive internal ba ing to remove air We opted to rear mount our tank and from the scavenged oil and ensures a breather for the improved rearward The factory continuous supply of engine oil back to weight distribution. windage tray turbo/ oil return port. The the pump. Finally, ARE also includes its The limited space under the hood requires light pan also features bosses to secure the breather tank and remote lter mount also made it an easy decision. Be masaging for the ARE pan included billet/anodized pump mount, setup in the kit. forewarned that the extra plumbing to clear. Aside which eases the installation process. When installing the system, required for a rear-mounted tank is from that, it’s The low pro le pan bolts up without removal of the OEM oil pump is time consuming and costly to build. a bolt-on afair. any modi cations required to the block required, and we opted to have the Speaking of plumbing, as with the rest The shalow pan and can be used with the engine in its original oil feed port blocked o while of the build, we’ve been using XRP t- depth alowed us to lower our standard location. the engine was being assembled at tings along with the company’s XR-31 engine 1.25 inches Also included in the kit is an ATI Gord Bush Performance. Installing the hose, and covered the lines where while maintaining damper designed to support the ARE pan is a straightforward a air, requiring necessary with a high-temp silicone/ adequate ground pump drive pulley, ensuring a secure only a slight modi cation of the OEM berglass re sleeve. clearance. and reliable drive interface for the windage tray to bolt up. The ATI crank I can’t stress how important it is to

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XRP XR31 hose and fi tings tie the entire ARE system together, Our lower engine position required a narower 3/4-inch drivebelt while a custom she tmetal shield serves to ke p any debris out and some machining on the ste ring rack mounting ear to make of the belhousing. Lok closely and you’l notice the turbo oil everything clear. drain line back on the pasenger side of the pan. Remote mounting the fi lter for the breather in the trunk ensures no oil vapors are present in the cabin. Also, a custom bung was instaled in the oil tank to house the oil temperature sensor.

take your time when building and rout- ing your oil lines. Ensure you follow the manufacturer’s instructions when assembling your ttings; I see far too many AN reusable-type ttings at the track that are half tightened, waiting to burst and set the car on re. I also see far too many lines rubbed through by tires and engine drive pulleys, or what- ever the case may be. Ensure your lines are properly secured and routed out of harm’s way. A failed -12 oil line can oil down the track in a hurry, endangering you and your competitors. Installing a dry-sump system like this is a time consuming and costly process. There are many factors to take into consideration, not to mention some good fabrication skills are a must. However, the long list of improvements that a dry-sump system a ords makes it an easy choice for race use. Taking a walk through any ALMS, Rolex/Grand AM, or other premium-level race series paddock will reveal that dry-sump oil systems are the only way to go.

SOURCEBOX

ARE Armstrong Race Engineering Inc. Dry-sump setup DrySump.com XRP Fittings and hose XRP.com ARE’s dry sump schematic helps clarify how everything is intended to operate.

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