November '15

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November 2015 The Shop 67 performance in power and performance. "It's super-competitive in the turbo- charger industry," adds Wynn, "which is a good thing for consumers. Turbo manu- facturers continue to push the engineering envelope, making turbochargers that per- form better and better." Your shop may want to take advantage of this trend. So we asked industry insiders for more detail about the latest developments in turbochargers and intercoolers. GAME-CHANGERS Street-performance technology is often p r o v e n i n d r a g racing, where turbo- chargers have recently b e e n "s i g n i f i c a n t game-changers," says Ainsley Jacobs, marketing analyst for Precision Turbo & Engine (PTE) in Hebron, Indiana. "As recently as a few years ago, the turbo- charged cars were considered the underdogs against superchargers and nitrous, but now the turbos are dominating their classes and repeatedly setting records." The turbos have been so effective, in fact, that the rules for a few classes are being rewritten. And, according to Jacobs, those successes in drag racing are now fueling development of street-performance prod- ucts. Among the latest developments in tur- bocharger technology, Wynn cites "billet or titanium compressor wheels, which can flow more air than traditional cast com- pressor wheels; dual ceramic ball bearings, which increase both transient response and durability; speed sensor ports to monitor shaft speeds; and anti-surge ported com- pressor housings." To which Jacobs adds "lightweight cast- ings, V-band housings, and PTE's own exclusive Competition Engineered Aero- dynamics (CEA) compressor and turbine wheels." It's important to remember, however, that turbocharging is hardly exclusive to drag racing—or even to big-displacement engines. Jacobs notes, in fact, that "demand for turbochargers that are appropriately matched, in wheel size and spool capa- bility, to smaller-displacement engines has been steadily on the rise. We're also seeing a larger demand for turbochargers in the diesel world, not only in competitive truck and tractor pulling, but also in the light-duty passenger-car diesel applications, which have been popular in Europe and Asia for some time." Obviously a bigger engine can make use of a bigger-diameter turbocharger. But there are other dif- ferences as well. "Enthusiasts run- ning smaller engines tend to have a keen focus on transient response and overall d r i v a b i l i t y, " s a y s Nor ton, "whereas big V-8 owners are often more inter- ested in making peak power. Even this is not always the case, however, and there are plenty of exceptions." In addition to just size, Norton explains, "there are technologies that are more readily adapted to certain engine platforms." Twin- scroll turbine housings are a good example. "To take full advantage of the transient response benefits that a twin-scroll affords, the exhaust manifold runners must be routed so that the exhaust pressure pulses BorgWarner's feature-rich EFR series spans a performance range from 225 to 1,000 hp per turbo. (Photos cour- tesy BorgWar- ner) The Tapercore from Hypermax features a unique trapezoidal core design that maximizes the heat exchange area while still fitting under a stock hood. (Photo courtesy Hypermax) • Innovative plasma-assisted combustion technology • Developed with the help of a US Department of Energy laboratory • Up to 7 horsepower and 9 ft-lbs of torque • Immediate throttle response • Available from many warehouse distributors 1-888-800-6700

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