Callaway tend to refer to each project with a C, followed by a project number.
C1 (Callaway Turbo Systems) The
Callaway Turbo Systems was the name of the development program and subsequent sale of the developed product, aftermarket turbocharger systems for BMW, VW, Porsche, Audi and Mercedes-Benz. The Callaway C1 VW turbo kit was contracted to Drake Engineering for the design. In exchange for the design, Drake Engineering concurrently sold the kit under their own name for the first two years of production; thereafter, Callaway retained exclusive rights. This was the first of the Callaway's projects, running from its company's foundation in 1977 to 1984.
C2 (Callaway HH Indy Car Engine) The
Callaway HH Indy Car Engine was a project to build a racing engine for IndyCar specifications from semi-scratch as an eleven-months-long program between 1980 and 1981. It was intended to show Callaway's capability to design and implement a complex high-performance engine program. The "HH" design engineer was a famed BMW and now freelance engine designer, Hans Hermann. The HH Indy Car engine V8 block was designed to fit two Hermann-designed, Drake Engineering water-cooled Volkswagen 16-valve cylinder heads.
C3 (Alfa Romeo Callaway Twin Turbo GTV-6) Callaway's success with turbocharger kits led to a commission from
Alfa Romeo to produce a higher end version of its 2.5-liter
GTV-6 coupé. Between thirty and thirty-six examples were built between 1983 and 1986, with the first prototype being sold and titled as a 1984 model, the subsequent four prototypes as 1985 models and the remainder (i.e. the "regular production") being sold as 1986 model year cars. In addition to numerous small component upgrades, the Callaway GTVs included a much revised suspension, improved brakes and a twin-turbocharger system, boosting performance to near-exotic levels. The C3 received a rear spoiler and a different hood with a large scoop. The car's performance caught the attention of
Dave McLellan, Chief Engineer of the Corvette, which would subsequently lead to the Callaway-Corvette association it would become famous for. However, an electrical failure,
C10 (Limited Edition Corvette Ski Boat) The Callaway-designed and built 383 cid engine was based on the Chevrolet Vortec V8, which in final tune produced 400 bhp at 5,250 rpm and 437 lb-ft at 4,000 rpm. It was then claimed as the fastest production ski boat in the world, with production runs limited to only 125 per year.
C11 (Limited Edition Range Rover 4.6 HSE) The top-of-the-line model in 1999 was a limited edition
Range Rover 4.6 HSE modified by Callaway in Old Lyme, Connecticut. A total of 220 were made and each one was numbered with "Callaway" stickers on the dash. They were available in Niagra Gray, Epsom Green, or Rutland Red. They had much of the black plastic painted body color and a special dual exhaust system. The high performance Callaway engine with at 5,000 rpm and peak torque of at 3,500 rpm improved the 4.6 HSE acceleration 0-60 mph from 9.7 seconds to 8.6 seconds. The Callaway 4.6 HSE sold for $75,000. The "short block" of the engine is the same as other Land Rover 4.6 HSE models. Short blocks used for the 4.6L Callaway engines were stamped with a 9.60:1 compression ratio marking from Land Rover. The increase of 0.25 points, up from the standard 4.6L compression ratio of 9.35:1 was achieved by a modification to the cylinder heads. The cylinder heads were also modified to improve the airflow into and out of the combustion chambers. The inlet manifold gasket front valley clamp was changed to accommodate the heater hose positioning on the bottom front of the Callaway manifold. The ram pipe housing was modified by shortening the ram pipe tube lengths. The intake runner lengths were tuned to increase both power and torque. The black plastic air inlet tube was replaced with a larger diameter fancy looking carbon fiber inlet tube to match the larger throttle bore in the plenum. The air cleaner box base was modified to increase the airflow. The Lucas GEMS ECU was calibrated to support the mechanical changes to the Callaway engine (the Callaway engine had the same basic FI as in 1998 and did not have the Bosch system that was on other 1999 HSEs). The Callaway drivetrain was also modified. The automatic transmission used in the Callaway 4.6 HSE Range has a different torque converter and the transmission control unit (TCU) was recalibrated to take advantage of the increased torque and power of the engine. The shift points in both "normal" and "sport" modes were changed to match the engine's increased power. The electronic shift transfer case has a new ratio sprocket set and chain. The resulting new ratios provide a high range ratio of 1.294:1 and a low range ratio of 3.481:1. The ratio change improves acceleration performance in the high range while also providing improved off-road
crawl performance and coast-down rates in the low range. The front axle shafts used on the Callaway 4.6 HSE were strengthened to withstand the increased torque applied to the front wheels from the engine and transmission changes. A material change in the axles ensures durability will be maintained for the front axle half shafts. Callaway decided to use a four-pin front differential to accommodate the increased torque rather than the two-pin front differential used on standard production Range Rovers. After working with Callaway on the four-pin front differential, Land Rover decided to put them in all of the 1999 Range Rovers since the 4-wheel traction control that added ABS-regulated traction control to the front axle in 1999 also put extra stress on the front differential (Range Rovers from 1993 to 1998 only had traction control on the rear axle). The Callaway dual exhaust had reduced backpressure and was similar to the dual exhaust that all NAS Range Rovers received in the 2000 model year. Changes to the exhaust system were made rearward of the catalyst "Y" pipe. The exhaust system backpressure was reduced by 43 percent, and the interior sound level in the passenger cabin was virtually unchanged. The center silencer provides reduced backpressure and is constructed from stainless steel. A twin tail pipe system was selected to provide a performance look and sound. The straight exit twin outlets are accented by T-304 stainless steel resonator tips to visually differentiate the Callaway 4.6 HSE from other Range Rovers. The pipes are welded onto the stock mufflers, and the rear bumper has cutouts for the tailpipes like it had in 1995 and 1996 (the stock single muffler pointed down, and the rear bumper did not have any cutout on the 1997, 1998 and non-Callaway 1999 Range Rovers). The exterior of the Callaway 4.6 HSE Range Rover had painted body color components. The exterior components painted to match the body color are the entire front bumper cover, the front grill, left and right headlamp trim, left and right door mirror casings, and rear bumper including area with exhaust tip openings. All Callaway Range Rovers came with the "Proline" 18-inch five-spoke alloy wheels. Body colors were available in Niagara Gray, Epsom Green, and Rutland Red. The vehicles are badged with "CALLAWAY" on the upper engine plenum, and on the lower rear tailgate under the 4.6 HSE logs. Some examples also have Callaway stickers on the front fenders. Inside, the Callaway Range Rovers received some additional wood surrounding the power window switches and HVAC controls, wood and leather steering wheels, and most had GPS.
C12 (Callaway C12 and IVM C12) With the unveiling of the completely redesigned coach-built fifth-generation Corvette, Callaway went back to the drawing board as well. Produced from 1997 to 2001, Reeves Callaway sought to compete in the GT2 Class at the famous Le Mans race. The race car's crowning achievement was a pole position in the 2001 race. On the street, Callaway's C12 was a complete reworking of its C5 Corvette brother with only the roof and greenhouse left untouched. In total, 20 cars were produced with exposed headlights, two taillights as opposed to the traditional four, and complete leather-covered interiors dyed to the owner's specifications. The street-legal sports car model was also built in
Bad Friedrichshall, Germany, by IVM Automotive as the
IVM C12.
C13 (Holden Special Vehicles GTS Coupe) Holden Special Vehicles (HSV) produced the HSV GTS 300 from 1999 to 2002. The GTS 300, named so because its engine's output was , was available in both
HSV Coupe and
HSV GTS bases. It was powered by a 5.7-litre Callaway-tuned C4B engine, based on the LS1 V8. At the time it was the most powerful Australian-made production car. Only 300 were produced by HSV, from 1999 to 2002, in Melbourne, Australia. There were 200 four-door GTS sedans and 100 Coupe GTS. Callaway received production-line 5.7 L engines from GM's engine plant and replaced the original equipment cylinder heads, camshaft and valvetrain components with Callaway-designed parts, then shipped the engines back to Michigan where they were exported to Australia as Chevrolet RPO C4B engines. They were conservatively tuned and badged as with a T56 six-speed manual transmission and four-piston caliper disc brakes all around; they were the flagship of Holden Special Vehicles.
Technical Specs Once the original ECU was remapped, valve springs were replaced with performance double springs, titanium retainers were replaced, slightly shorter pushrods used, and the air intake and exhaust systems were modified, they produced in excess of . Camshaft specs: 224°/230° duration, .581" intake lift, .588" exhaust lift, 114 degrees overlap (red line at 6700 rpm) and using Shell 98/100 octane V-power gasoline, realized an increase in power to or (503 bhp) at the flywheel and around to of torque) – approximately to at the rear wheels. Zero to in 5.2 secs, standing 1/4 mile ET of 13.9 seconds and an estimated top speed at 5000 rpm in 6th gear of approx. . C4B GTS cam is 212°/222°, .560"/.569", 116.9° LSA (as per Comp Cams check organized by Sonny from Marranos Enhancement Division, Sydney Australia).
C14 (Mazdaspeed Protegé) Callaway Engineering was contracted to develop and apply a turbocharger system to the
Mazda Protegé. Approximately 4,500 examples were built (1,750 2003MY and 2,750 2003.5MY), thus launching the MazdaSpeed Program to a commercial success. • Developed using an MP3 edition Mazda Protegé, Callaway designed a compact turbo system which bumped power to 170 hp (over the MP3 Edition's 140 hp). • Mazda used the same suppliers from the MP3 Program: Racing Beat, RacingHart, and Kenwood. But they included Callaway Cars to add turbocharging to the Protegé's powertrain. • Callaway adapted a Garrett T25 ball-bearing turbo with an integral wastegate, and developed a unique turbine housing for this application. • Manual 5-speed transmissions were the only way this vehicle could be had. • Upgrades to the drivetrain included heavier (24 mm vs. 22mm stock) half-shafts and a Tochigi Fuji Sangyo KK Super limited-slip differential. • Wheels were 7.0 × 17-inch aluminum alloys from RacingHart, wearing Z-rated 215/45 Bridgestone Potenza RE040 tires. • Larger brakes were fitted, and a larger radiator for cooling. • Colors were limited to Black and Spicy Orange, initially. Later, with the mid-year revision, Titanium Gray, Laser Blue, Sunlight Silver and Blazing Yellow were made available.
C15 (FIA Corvette GT3) The
Callaway Project C15 was originally known as the
Corvette Z06.R GT3, a competition version of the
Corvette C6 Z06 built to compete in the FIA GT3 category of
GT racing. The cars are built at Callaway Competition's facility in
Leingarten, Germany and raced in the
FIA GT3 European Championship. With Chevrolet's 2014 Corvette model change, Callaway Competition began development of the C7 GT3-R racecar. The new car made its debut at the Hockenheimring in Germany in October 2015. The Chevrolet Division of General Motors granted exclusive authorization to construct, homologate and sell Corvette C7 GT3-Rs worldwide, except North America where Cadillac Racing campaigned in GT3. For the 2018 racing season, Chevrolet expanded their exclusive authorization to include North America, as the Cadillac Racing program was terminated. The first three Z06.Rs were built for Callaway Competition themselves, followed by the rest for privateers. As of 2007, ten were built to compete in FIA GT3, as well as the
ADAC GT Masters and
Belcar series. In 2007, the Callaway Competition team, competing under the Martini-Callaway title in the FIA GT3 European Championship, earned three race victories and three second-place finishes and won the Teams Championship. Drivers
Luca Pirri and
Jürgen von Gartzen took the runners-up in the GT3 Driver's Championship. In
2010, Callaway drivers
Christian Hohenadel and
Daniel Keilwitz finished the season as
FIA GT3 champions, taking four victories to secure the title with a round to spare. The knowledge and experience learned from the race program was used in the Callaway C16 series of road-going sports cars. Except for 2011, Callaway Competition has been competing in the ADAC GT Masters series. The Callaway Corvette C6 and C7 racecars have also been active in other series. For the 2017 race season, Callaway and its drivers captured the ADAC GT Masters Teams Championship, Drivers Championship, Junior Championship and second place in the Trophy Championship.
C16 (Callaway C16) The
Callaway C16 is a bespoke automobile based on the
C6 Corvette. The C16 is marketed as an alternative to the
Porsche 911 GT3, the
Lamborghini Murciélago, the
Ferrari F430, or the
599 GTB and is offered in three different body styles:
cabrio,
coupé, and
speedster. It was unveiled at the
Greater Los Angeles Auto Show in 2006. Production began in 2007. The car was sold fully equipped with a set of coordinated features such as the supercharged engine, full leather interior, proprietary Callaway/Eibach suspension system, the LeMans brakes, and carbon-magnesium wheels. Options included the selection of a comfort seat or a sportseat, carbon ceramic brakes, and fitted luggage. Cars were built to order, where the owner chooses the interior leathers and the exterior color. All cars were sold by Callaway directly and were supported by a five-year/50,000-mile powertrain warranty. The Callaway Corvette package also includes emblems, badging and plaques bearing the Callaway name as standard equipment. Callaway provides a three-year, 36,000 mile warranty on Callaway components, which also covers any GM-supplied components that fail due to a failure of the Callaway parts. Warranty coverage can be upgraded to a 5-year, 60,000-mile powertrain service contract at an extra cost.
C21 (Callaway AeroWagen) In 2017, Callaway began producing the AeroWagen package. It was offered in the tradition of coach-built
shooting brakes for any version of the C7 Corvette Coupe. Its components can be fitted to the standard production C7, the Callaway SC627 Stingray or Grand Sport, or the Callaway SC757 Z06. The AeroWagen hatch assembly is a part-for-part replacement of the original equipment Corvette rear hatch, using the original hardware and latching mechanisms. It operates in an identical fashion.
Un-numbered projects Mercedes Benz 240D, 1983 • Initially created for Callaway's own personal 240D • Boosted stock power from to an estimated • Covered in detail by
Motor Trend in May 1983
Kohler Turbocharged Generator Sets, 1985 Kohler Generator Division asked Callaway to increase the power output of a genset by 50%. Most standby generators are housed in rooms that are not easy to resize, yet the demands for standby, emergency, and backup power increase. If the same frame size could potentially produce more power, the economics are clear. Callaway supplied the development, testing, and subsequent production turbocharger systems to Kohler.
Iso Rivolta Grifo 90 Prototype, 1990–1991 In 1990,
Renzo Rivolta's son, Piero, asked Callaway to be the engine supplier to his new Iso Rivolta Grifo 90, a revival of the Iso Rivoltas from the 1960s and 1970s. The Iso Rivolta cars had DNA that included Italian coachwork and V8 engines from Corvette—an inspiring formula for many. The challenge was to create a powerful, modern, 1990s design and restart the car company. Three elements were brought together:
Marcello Gandini (designer of the Lamborghini Miura, among others),
Giampaolo Dallara (Dallara formula cars) and Callaway to be the contributors to the Grifo 90 Project. The design was penned, the full-size clay commissioned, and the car was presented to the press in Italy in the spring of 1990. The economics of the time prevailed and the promises of government financing never materialized, and the project halted.
Speiss Twin Turbo V8, 1991–1992 The Speiss Supercar was commissioned by Robert Speiss to be constructed in his private factory in Gemmingen, Germany. Already a successful supplier of generators to industry, Mr. Speiss hired Karl Heinz Knapp to engineer and produce the world's first all-carbon composite sports GT car. Callaway was hired to design and produce the engine package based on its experience with the twin-turbo Corvette program for GM. Full compliance with EC regulations, 600 bhp and 600 lb-ft torque, bespoke configuration and production quality control were all requirements of the program. Unique intake manifolding, twin AiResearch turbochargers, and specially cast exhaust manifolds resulted in a svelte package. The project was cancelled before production began. However, the vehicle did meet all of its technical objectives.
Ruger-Stutz DV32 Turbo, 1993–2001 William Ruger Sr., of arms-making fame, was in love with the Stutz DV32 in his youth. He challenged Callaway Engineering with the assignment: "If you were Harry Stutz, and you suddenly awakened knowing what is now known about engine technology, what would you do to the DV32?" Callaway's answer was a turbocharged, fuel injected version of the original Stutz 5.0-liter DOHC straight eight that made more than 300 bhp at 3800 rpm. The modernized engine drove a GM Turbo-Hydramatic 4L80E. Suitable power and torque for a 6000-pound automobile.
Callaway Cyclone V16, 2004– The Callaway Cyclone V16 is a prototype engine for a future Callaway project. Specifications: • 16 cylinder, 90° V-angle, aluminum cylinder block with iron liners, aluminum cylinder heads • , naturally aspirated, electronic fuel injection • Bore: 75.50 mm (2.972″) • Stroke: 55.75 mm (2.195″) • Compression ratio: 11.5:1 • Valvetrain: DOHC, 5 valves per cylinder, patented camshaft drive system • Maximum horsepower: 550 bhp at 10,000 rpm (2.26 bhp/cid, 138 bhp/L) • Peak torque: 340 lb-ft at 8,500 rpm • Maximum engine speed: 10,500 rpm • Length: 926 mm (36.45″) • Width: 540 mm (21.25″) • Height to top of throttle body trumpets: 500 mm (19.70″) • Dry weight: 152 kg (334 lb) • Dry sump lubrication, triple plate 5.5″ diameter clutch, electronic coolant pump ==Notable models==