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IN the
auto arena, discussions of one-upmanship are common,
such as how much horsepower (hp) and torque certain
vehicles make. It is easy to claim that one’s vehicle
makes x amount of hp and y Nm (Newton-meters) of torque
because the manufacturer’s brochure or owner’s manual
said so, or that a particular power-generating
after-market piece (such as air intakes or bolt-on turbo
kits) adds b amount of hp because it the product
literature says so. But can one really determine if the
manufacturer’s claim is true?
One way
of finding out is to go to Speedlab. Located along the
Welcome Rotunda-bound area of Quezon Avenue
(specifically one or two buildings before the Petron
station on Quezon Avenue near Honda Quezon City), this
1,700 square meter one-stop shop is a haven for all
one’s auto-mechanical needs, aside from offering
customers the opportunity to tune their vehicles using a
chassis dynamometer made by Dastek (a reputable US-based
auto performance company).
The
crown jewel of Speedlab, the Dastek chassis dynamometer
(or dyno for short) measures power whilst a vehicle is
in motion. This means that a chassis dyno measures a
vehicle’s power capabilities via the wheels that drive
the vehicle (whether front or rear wheel drive), unlike
engine dynos where only the engine is tested (with great
effort to the dynamometer directly at the flywheel). “An
engine generates power at the flywheel, which is
transferred to the gearbox via a clutch and pressure
plate. The gearbox in turn transfers the power to the
differential which again powers the drive-shafts which
are coupled to the wheels. All these devices absorb some
of the power and as a result the power that is delivered
at the wheels is substantially less than the power
delivered at the flywheel. The losses may vary between
18 percent and 28 percent. The power at the wheels is
what will determine the performance of the vehicle. The
main problem is that all manufacturers specify power at
the flywheel and not at the wheels,” said Speedlab
marketing manager Sidney Ang.
Another
unique aspect of the Dastek dyno is that it is both an
inertia and a load dyno. With regard to the former, this
means that the Dastek dyno has a brake attached to the
one roller, which will keep the vehicle at any given
speed. With this style of dynamometer the vehicle can be
driven and tuned at constant engine speeds under various
load conditions. With regard to the latter, the Dastek
dyno also works on the basis that the vehicle is driven
at full throttle in fourth gear from a low speed
(usually 120 to 140 kph). How fast the vehicle
accelerates the rollers is measured and from there the
power is determined. The vehicle is then taken out of
gear (or the clutch disengaged) and the deceleration is
measured by allowing the rollers and wheels to slow down
by themselves. “This is the only way to properly tune a
vehicle and determine power output at all parts of a
vehicle’s rpm (revolutions per minute) range, not just
at full throttle,” said Speedlab operations manager
Ferman Lao.

Load ‘em
up
This 1996 Mazda 323 of Protégé Tech club founder and
trustee Andy Adan is just about to be tested for its
horsepower and torque output. Note the fan in front of
the vehicle used to simulate airflow at 120-plus kph.
There
are three forms of Speedlab dyno sessions. The first is
what is known as baseline runs, where three loaded runs
are performed on the vehicle, which determines the
vehicle’s horsepower and torque. The second is a group
session developed exclusively for car clubs, in which
they can have exclusive use of the dyno for one whole
day, with group discounts.
The
third is known as tuning sessions, where a vehicle owner
gets the opportunity to discern whether particular
power-generating after-market pieces add horsepower to
the vehicle and is determined by the amount of power (or
the amount of power-generating after-market pieces) the
client wishes to bolt on to his or her vehicle. “If you
have camshaft gears, air/fuel controllers, ignition
spark amplifiers/ignition boxes, boost controllers or
stand-alone engine management systems, you will
definitely need tuning sessions,” said Lao.
Should
one have the need to modify his or her vehicle’s engine
into something straight out of The Fast and The Furious,
Speedlab also offers the following auto performance
upgrades: 1) Custom fabrication, in which the certain
parts are made by Speedlab in order to facilitate better
airflow or oil flow in and out of your vehicle; 2)
Performance parts installation, including turbo kits and
nitrous oxide (a well-known power adder) kits; 3) Corner
weighing, the best form of suspension tuning and is
particularly helpful if one’s vehicle has coil-over or
adjustable shocks; and 4) Electronic control unit (ECU)
tuning, in which the engine map (overall engine
behavior) is calibrated.
If one
has the urge to one-up his or her rivals at the drag
strip, at the auto show, at the drift course, at the
racetrack or during discussions about horsepower
bragging rights, then one should call 376-4648 or
376-4651 for more details. |