Race Engine Technology issue 022 : MAY 2007
25
FOCUS : PUMPS Aeromotive electric fuel pump THE AEROMOTIVE, INC. FILE THE AUTO VERDI AB FILE PRODUCT
Dry sump oil pumps and con rods for racing engines,
primarily for cars RACING MARKET
Paul Hasselgren: MAKING A 24-HOUR RUNNER THE COMMUNICATIONS HUB OF THE RACING POWERTRAIN WORLD Jack Hylton PRODUCT
DIESEL WARS Peugeot versus Audi
NHRA FUNNY CAR All the 8000 bhp engine players
LOSING AT NASCAR Cup engine development
MAY 2007 USA $20, UK £10, EUROPE e15
www.highpowermedia.com 00 RET
MAYCover.indd 1 20/4/07 16:45:15 40 40-48
Focus.indd 40-41
flow rates as well as different race regulations have all contributed to big changes in the world of fluid pumps. The one thing that remains constant, however, is the need to match the pump to the application. Essentially, a race engine fluid pump must fulfil its function with the highest possible efficiency and as near as possible 100% reliability. Bill Dailey of Dailey Engineering in Temecula, California, says: “All components in our Roots-type dry sump oil pumps are manufactured in house with competent people, which is the only way I have found to assure the quality of the final product. This is the largest factor in guaranteeing a reliable product”. The foundation of a reliable pump is established at birth and missing a key feature in the design process cannot be overcome later. Dailey
Fluid flow T
Glen Smale talks to the manufacturers of oil, fuel and water pumps for racing engines: how do they view current technology?
he modern day race engine fluid pump - oil, fuel or water - has had to contend with constant changes in many respects. Advances in construction materials, the composition of the fluid being carried, increased internal pressures and
mechanical and volumetric. To create an oil pump with the least amount of friction, Dailey utilizes Teflon coated bushings on both the drive and driven shafts, reducing the friction area from 7.5” of aluminium or brass to a length to 1.0” of Teflon for a typical NASCAR Cup pump. The bushings also force the shafts to operate in a much more accurate position which is critical to an efficient pump. The volumetric efficiency of an oil pump will dictate the ability
of the overall product to perform efficiently no matter how good the bearing system. The scavenge side of the Dailey pump utilizes a two- lobe Roots-type scavenge rotor operating within a housing made from 7075 aluminium. Since both parts have the same coefficient of thermal expansion the pump has the same internal clearances no matter what temperature it operates at. The inlet design of an oil pump can affect its filling ability, which
can decrease volumetric efficiency. No mater how good the volumetric efficiency is, the pump can only pump the volume of fluid it has
Electric and mechanical fuel pumps, fuel pressure regulators, filters and complete fuel system kits for high performance EFI and carburettor applications RACING MARKET Virtually all major racing series, including NASCAR, NHRA, IHRA, NMRA, NMCA, SCCA and Super Chevy HEADQUARTERS Lenexa, Kansas, USA WEBSITE
www.aeromotiveinc.com KEY PEOPLE CEO: Jack Hylton President: Steve Matusek Director of Business Development: Kyle Fickler Director of Engineering: Shawn Wessol V.P. of Operations: Jeff Stacy Tech: Brett Clow BACKGROUND
strives to achieve a reliable pump by paying attention to stress levels as components are designed to be as light as possible without sacrificing performance or reliability. For this reason all the components are designed to operate within the materials endurance limit for stress when used under normal operating conditions. These very critical factors led to the creation of a highly reliable pump, which was used on the Le Mans winning Corvette C6R and over 80% of the Daytona Prototype field, where reliability is mandatory for 24 hour endurance racing. The efficiency of an oil pump is broken down into two components,
Founded by Steve Matusek and a partner in 1994; still privately owned GLOBAL DISTRIBUTION Available through most major performance warehouses worldwide
sucked in before the transfer process begins. This is called the filling efficiency of a pump and is the most important factor of its overall volumetric efficiency. According to Roy Johnson of Johnson’s High Tech Performance in
Valencia, California: “The primary requirement of the oil system is [to control] 70-80% of a race engine’s cooling. Lubrication is the lowest requirement”. But the oil pump must also have reliability and high volumetric efficiency at duty cycle, experience that Johnson drew from its aircraft design standards. For Johnson, reliability is attained from its choice of mil spec design standards, materials, processes and coatings common to the aircraft industry. It reports that this has paid dividends, as its pumps have shown no wear or loss of efficiency over 50,000 miles or more of use. “High efficiency is attained and maintained at duty cycle because
we have designed the pumps for final clearance at engine operating temperature and system pressure,” Johnson added. Working with its customers to engineer its oil systems (hoses, filters, oil reservoirs, and breathers), has shown that many systems are misconfigured with no internal support coil in suction hoses, with filters causing too much restriction to flow, with oil reservoirs having air filters for breathers, as
Steve Matusek Kyle Fickler Jeff Stacy
Pumps go to NASCAR, NHRA drag racing and offshore boat racing plus all kinds of auto racing, mostly in USA HEADQUARTERS Smedjebacken, Sweden WEBSITE
www.autoverdi.com KEY PEOPLE Managing Director: Stefan Verdi Technical Director: Steen Skoodborg Sales: Jarmo Pulkinen SCALE OF OPERATION
Stefan Verdi
Steen Skoodborg
7 employees; 99% motor sport business BACKGROUND Founded by Stefan Verdi in 1988 and still privately owned, jointly with Steen Skoodborg GLOBAL DISTRIBUTION Represented in Europe, USA and in Australia
Brett Clow
well as sometimes too high operating pressures causing engine failure. Johnson adds: “It is important to give customers the knowledge of
how the oil functions in the engine (hydrodynamic principal), what the engines oil requirement is (gpm based on viscosity and heat exchange), and what viscosity and film strength of oil represents”. In the opinion of Stefan Verdi of Auto Verdi in Smedjebacken, Sweden: “Today’s dry sump system and [oil] pumps are very efficient, but the need for space in the cars and the plumbing system will always take some of this efficiency away. Roots-type scavenge system pumps provide high volume from a small package”. Aeromotive, Inc in Lenexa, Kansas manufactures over 20 different fuel pumps for a wide variety of applications, and the various applications call for different styles of pump. Kyle Fickler of Aeromotive says: “For true continuous duty applications, we rely on roller vane pumping mechanisms using materials and processes typically reserved for aerospace applications”. An application specific fuel pump is not necessarily defined by car or engine make: what Aeromotive focuses on is horsepower, induction type, type of racing, fuel type, pressure range, and so forth. Jim Craig of Weldon Racing Pumps in Oakwood Village, Ohio, says:
“Our racing fuel pumps are manufactured using leaded bronze and tool steel. The leaded bronze is the bearing that the pump rotor rotates within. The pump rotor, blades and pump ring are manufactured using M7 Tool Steel, making our pumps compatible with all types of fuel including methanol and ethanol”. Craig continues: “By using tool steel and leaded bronze, our pumps
do not fail or encounter a performance decrease as the system pressure rises, such as when fuel injection or boosted applications dictate. We also utilize a slung vane configuration rather than a gerotor, or spur gear style”.
41 6/10/10 22:33:41
022 contents
• INSIGHT: F1 ENGINE FUTURE How Formula One is moving slowly but surely towards a revival of engine development
• PROFILE: PANOZ LE MANS V8 Inside the Ford Modular-based 2006 GT2 winner
• PREVIEW: LE MANS 2007 Has gasoline a hope as Peugeot joins the diesel ranks?
• MOTORCYCLE: APRILIA 250 Is this the last hurrah for the racing two-stroke?
• SHORT TAKE: ABB
TORDUCTOR Advanced non-contact torque sensing
• IRED: FUNNY CAR The NHRA engine builders
www.highpowermedia.com • FOCUS: FLUID SYSTEM
PUMPS How the suppliers view current and future tech
• SHORT TAKE:
EXHAUST DESIGN Jack Burns finds a lot of scope for improvement in exhaust system design
• INSIGHT: NASCAR FRICTION How Evernham Engines loses to win
• SUPPLY CHAIN: HASSELGREN Anne Proffit investigates how Paul Hasselgren’s eponymous racing engine company interacts with its supply chain
ISSUE 022 race engine TECHNOLOGY MAY 2007
PANOZ ELAN V8 • LE MANS 2007 • APRILIA 250 • HASSELGREN SUPPLY CHAIN • EXHAUST DESIGN • FOCUS PUMPS • NASCAR FRICTION • IRED FUNNY CAR
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