Technology Takeover: What's Behind the '11 Mustang's New V-8? by ProQuest


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									              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
    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
    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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