[...] the team designed and tested a new cylinder head. According to Ford, the flexibility allowed by Ti-VCT means Mustang customers will experience: * Better off-the-line launch feel with plenty of the low-end "grunt," for which Mustangs are famous.
RACING TECHNOLOGY with Evan J. Smith Technology Takeover: What’s Behind the ’11 Mustang’s New V-8? photos by Ford Motor Company hough automobiles have been around for T more than 100 years, only in the last 20 or so have computers enhanced performance and drivability for the street and track. Gone from new vehicles are carburetors, points, and even distributors; the latest factory hot rod engines feature electronic fuel injection (some with direct injection), coil-on-plug ignition, and other newer technology. Ford recently introduced its latest techno piece: a naturally aspirated DOHC, 5.0-liter, V-8 engine that will power the ’11 Mustang GT. It’s a four-cam, all-aluminum wonder that produces 412 horsepower and 390 pounds-feet of torque and can get 26 mpg (miles per gallon). Ford’s V-6 for the base Mustang makes 306 horsepower and can knock down 31 mpg, making it the first 300- plus-horsepower production engine to crack 30 mpg. A main feature of the 5.0-liter (or 302-cid) powerplant is the advanced Ti-VCT (Twin- independent Variable Camshaft Timing). Having variable cams is a big advancement that will no Ford’s ’11 Mustang GT will be powered by doubt trickle into drag racing over time. The 5.0 a new 412-horsepower, 5.0-liter, DOHC also sports 11.0:1 compression, a composite engine featuring variable cam timing. intake, 80mm throttle body, and “tuned” tubular Despite its small displacement, it cranks headers. out 390 pounds-feet of torque. It’s leaps and bounds above what many performance enthusiasts know as the “other” 5.0- Prototype cams were next. “For the first time efficiency beyond just the peak power points in liter engine, which in its best trim made 240 ever, we only ground one set of cams,” said the curve. horsepower (in the ’94-’95 Cobra); 5.0 engines Adam Christian, ICE (Intake, Combustion, and “The Ti-VCT system is actuated by camshaft that made less Exhaust) engineer. “It torque with assistance from pressurized oil,” said horsepower could be usually takes dozens Harrison. “Using camshaft torque energy found under the hood of prototype cams to provides even faster throttle response and of Fox-body Mustangs find the right maximizes use of existing energy to aid fuel from 1979 to 1995. combination. But economy. Working like a ratchet, the one-way In 1996, Ford these were not just valves allow precise timing of camshaft events, switched to the two- any old cams because continually optimizing timing to provide valve, SOHC, 4.6-liter they would benefit maximum torque or maximum fuel economy, “modular” engine. The from the Ti-VCT. based on driver input.” term modular comes “The new 3.7- The new heads feature a compact roller-finger from the fact that most liter V-6 and 5.0-liter follower valvetrain, which leaves more room for modular-engine (4.6-, V-8 engines use a high-flow ports. Head structure was desi
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