The New York herald., 1920-01-04
PIERCE "A VALVE
ANSWERS EVERY
: WH|M OF USER
Despite Present Model Has Been Out
Months Exhibit Attracts
Thousands.

Dual vstvs engine ef sff1cfency D seen
In its highest stage Of development In the
Piercc-ArTow passcngsr oars ,displnyed at
tho Automobile Show 1t the Grand Gen.
trni Palace this weots. Because Of the
fame gained through the astonishing per-
formancs Of tbs perfscted engine the
improved Pierce-Arrow dual valve six
promises 20 command chief interest at
the exhibit.
IT b IN engine that answers every
whtm Of the driver" says Mr.. Clarence
w. Cady. OF the Harrolds Motor Car
Company. 1T can crawl along at four
miles an hour and suddenly squirt to
racing speed: It can hold steadily to the
road at seventy-four miles an hour with
top and windshield up: It can ascend the
steepest hill with q powerful sureness
that frees tho minds Of passengers from
anxiety.
There Is q mechanical reason, Of course.
for the remarkably Increased flexibi1ity.
power and speed Of the dual valve six.
Of fresh vapor Is assured through the
double intake valves"
Because there are two exhaust ana two
intake valves for each cylinder, instead
Of ono each, the breathing capacity Of
Dead gases, which If not expelled COM
pletely would contaminate and deaden
the incoming explosive mixture, are ex-
hausted perfectly. Likewise, a full charge
Most striking Of all Is the fact that be-
cause Of a thirty per cent increase IN en-
gine efficiency. as compared with former
engines with similar stroke and bore, the
dual valve engine Is far moro economical
In gasolene consumption. In fact. the saw
ing amounts to eleven per cent In the
lS-horse power model and twenty-five per
cent in the 33-horse power size.
In terms of power the identification OF
Pierce Arrow cars as 38 or 48-horse power
models gives no conception OF the torce
that actually is generated The actual
horse power developed Is enormously
greater than that indicated.
In striving to refine the performance or
the engine, which for nearly two years
has given satisfaction to thousands Pierce
Arrow engineers have bettered the igni-
ton system SO that 1t insures an even
smoother running Of the engine and a
greater degree Of reliability. Instead Of
the battery magnetic system. which was
difficult to synchronize, special oual
ignition system has been perfected by
Pierce Arrow and Delco engineers. This
dual system, which uses two sets Of spark
plugs, two distributors and two timers.
working Independently. yet in exact uni
son, enables the engine to accelerate more
readily and to run more positively at slow
speeds.
Another refinement which features the
cars on display Is In the transmission.
Gear shifting now is accomplished with an
ease not possible formerly. This is espe-
cially noticeable on steep hills in shifting
from a higher to lower gear. In fact, a
shift can be made noiselessly and quickly
from fourth speed to third while the car
is speeding at rate of fifty miles an hour.
A study of the stock models on dis
play at the show is convincing PROOF OF
the fact that the Pierce-Arrow policy
of quality first has been upheld. Both
the 3S and 48 h. p. models represent the
final note in motor car building.
Two exhibits are offered to the pup
lie by the Pierce-Arrow company. One
is at the Grand Central Palace. A sup
Elementary exhibition is being held at
Pierce-Arrow distributors, the Harrolds
Motor Car Company, Nos. 2SS to 23s West
Fifty-fourth street. near Broadway.
At the Auto Show. itself. one 80 n p
and two 4s h. p. models are displayed.
The SO n. p. car represents one OF the
most popular closed model, a town
the showrooms of the New York city
brougham. The 4s h. p. cars both are
touring models. One is a six passenger
and the other four passenger. The
latter car is OF striking beauty. being
fitted with a Victoria top.
At the Fifty fourth street showrooms
Of the Harrolds company may be seen
five 3S h. D. models and two 4S n. p.
sizes. The former include four pas
senger roadster four passenger sedan,
q flat rooted brougham, a coupe and a
five passenger touring car with two ad-
ditional auxiliary seats. One of the
4S h. D. chassis is fitted with the stand
ard seven passenger touring body and
the other Is a French brougham.