El Paso herald. (El Paso, Tex.) 1901-1931, 1913-05-17

cylinder 5x5 inch motor this week I
put IN new piStOns, which are seven
POUNDS less than those which were re-
placed IS horsepower gained with the
new equipment, at say, 1000 reVOlu-
uOns per minuteI What is the limit
OF the piston speed Of auto engines p
Harry Davis.
Power cannot be increased by lighter
weight pistonS The increase in r.
p H. Is the more prominent factor.
OF course, II the engine speed is great
or, the working parts must be designed
accordingly. The inertia Of reciprocal
ing parts is the cause Of considera bic
loss or power and poor design As the
engine speed is increased. the size Of the
valves and other material parts must
also be 1ucrea sed AS to the limit of
piston speed, It may be said thar there
are several factors which determine
tnls- one on these is the proper de-
sign OF the intake manifold controlling
me 1eeo1ng OF the gases. Another is
proper carburetOr d&ign. Another is
me design of the exhaust system for
the proper scavenging OF the cylinders;
also, as mentioned previously. the
proper design and balancing Of the re-
clprocating parts
Motoring Department The Herald
our -- touring Ger when starting
on low speed jumps and sort Of plunges
ana does not speed Up to where. it
should so that when throwing in high
speed gear 1t causes the engine to labor
in order to get up speed On reverse
the same plungfng occurs. What should
be done to improve the operation Of the
carr is there any way to make the
car run even on low speed2 When the
gas IS thrOttled down IN slow running
Is the uneven running liable to be due
10 the carburetor, adjustment or spark
timing2-D. c. Hall.
From what you have stated ft would
appear that the low speed locking de-
vice Is IN need Of adjustment If the
trouble were IN the carburetOr adjust
ing. or the ignition timing. ii would be
- -Trrrr p lob
gear, as the engine turns over more
slowly and interruptions Of the motor
lmpulses would be more noticeable.
w nile running In low gear the engine
IS turning over Iast and for this reason
an occasional miss should not be so
easily 1elt Il seems more than likely
that the locking device or clutch Of the
low speed needs proper adjustment
Motoring Department. The Herald
The inner tubes on my car blow out
quite often through what appears to
be weak spots They have an appear
ance as If they had been CheWed bv the
1901 when putting on the tire. I would
IKE 70 know II the ruDDluS or the irons
against the tubes is sufficient cause for
these blOWOuts-A- S. C.
In putting on tires great care should
be taken In the handling OF the irons.
Very often the inner tube is punCtured
By the iron, in which case the owner
realizes this trouble when he tries to
initiate the tire 1t often happens, how
ever, that the inner tube is bruised by
the Tire iron to such an extent that it
viii last probably a few hours and
possibly several days. 1t is an easy
matter 10 keep the irons away from the
tube If one watches carefully the posi-
ton OF the irons When putting a tire
and tube on the rim 1t is adVisa bic TO
slightly initiate the tube so that IL viii
not be so easily caught by the tire
irons
Motoring Department, The Herald
I want to remove the bolts which hold
the hub on my front wheel, but as
they are round headed the entire bolt
turns when I turn the nut There is
no way of holding them so they viii
not turn bow can L get them off,
Il N HurlbUrt
IF you do not care to cut the bolts
would suggest that you slot the head of
the bolt and hold ii with a screw
driver or would suggest that you file
a fiat surface on each side Of the bolt
so that II may be held by a wrench
while the nut is being removed
Motoring Department. The Herald Z
The motor OF myfO reign car gets very
hot the water bOifs and the engine
knocks on even the smallest grade. Ny :
garage man tells me that the bearings
are IN good shape ana that no carbon IS I
IN the cylinders. but it still knocks.
If the compression were reduced by (
putting plates IN the cylinders would
this step the knOcldug2 Please give {
me some Information IN regard to this.
s.. p. Depree
1t is possible to eliminate your trouble I
by reducing the compression A high
compression motor viii knock very
easily and 1t is possible that the fault ]
lies in the original design. BY reducing 8
the compression slightly you VIII net
inJure the motor and the experiment is (
not an expensive one. 1t has been ,
done in number Of cases with good {
results
Motoring Department The Herald I
Recently 1 read in your paper that it /
IS good to put a tablespoonful Of kero-
sene In each cylinder after a run. st I
times / use my car but once or twice /
a week, and would like to know II I /
ADOPT this kerosene habit" is it neceS- 4
or could ] leave the kerosene I
in the motor from one run to another 4
Owner.
It VIII do the motor no harm to leave
the kerosene in. as it has a tendency to I
saturatc and soften the carbon in the I
combustion chambers in the cylinders to I
such an extent that when the motor is .
S LarJeu at least a portion OF this carbon ,
viii be dlslOdged and blown out through /
the exhaust If a carbon deposit is per
mltted TO build up in the cylinders It
eventually becomes hardened 20 such I
an extent that when the motor is heat
Ing this carbon becomes incandesCcnC,
causing pre-ignluOn Of the gases. A
title kerosene inserted occasionally viii
to a certain extent prevent this. some
motors. according to their design, have
more OF a tendency 70 carbOnlze imam
y LnELS. OF LG4S reason II Ganl01 be
said that the use Of kerosene will pre-
vent che carbCnizatiOn OF the cylinders
Ia all cars 1t VIII, however. tend to
reduce the amount Of carbon in the
cylinders when properly applied After
d run 1t is advisable to insert the kero-
5ene through the petcOcks or otherwise
directly IN the combustion chamber and
then turn the motor over a few times
By hand. so that the kerosene win
5aturate the carbon Of the whole COM
1ustiOn chamber.
Motoring Department, The Herald
st times one or two of the exhaust I
valves ca my car viii not but
liter the motor gets WarI7 act I
III right What causes J. 4
1t would be advisable r.
lughly with kerosene bOl q
guides Valves should e
sticky unless a very poor 81
g used All the old OH r. Z
Trained from the motor andl e ]
'ySIem cieauSed with KerOst IN
use fresh oil Of a better gradc-1-
Motoring Department. The Herald
" nat causes motor to fail to start
lIuer being stopped a short time when
ne carouTetor seems TO work well and 4