El Paso herald. (El Paso, Tex.) 1901-1931, 1913-06-14
Copyright. 1918. by ". H. Stewart, II.


Motoring Department The HerOld-
Although I have put plenty of heavy
grease in the housing. the gears OF
my - touring car make a most an
noying grOwL How can I silence them?
Is this noise caused because the plniOns
are possibly meshed either too deep or
shallow
If the piniOn gears are meshed too
tight there viii be a heavy grinding
noise or grOWl- On the other hand, II
they are not close enough there viii be
more or less of a loose rattle, especial
~ in changing gears With a steady
not be so noticeable. The pinion gears
usually cause the trouble. especially
when a new one is placed in mesh with
an old one The old gears wear them
selves TO a fixed position, and when a
new gear is installed there is more or
less unavoidable noise This. of course,
would be greaty aggravated by mesh
ing too tightly They should be ad-
justed TO a point where there is no lost
motion, but perfect freedom of action.
This adjustment should not be made
a one point only. but the gears should
be revOlved to make sure that there is
freedom of action at all points in turn
ing. Heavy grease will help to silence
the noise, but will not prevent it If the
adjustment is not correct
Motoring Department. The HerOld-
Now that the 1913 racing season has
been inaugurated with the Indianapolis
contest a fortnight ago, these questions
are timely and OF general interest Cd
Is a narrow or wide tread best adapt
ed for racing2 Cd Why have racing
cars got their frames and Oftentimes
the motor castings bored full of holes?
CD What kind. Of Oiling systems are
used on most speed cars2 ca Why do
they have but one ring to the piston.
and in such cars is the piston turned
generally used-T. R Barthew.
% The tread is usually standard
but il is sometimes narrowed to save
weight There is a limit to this. how
ever. as car with a narrow tread is
more likely to turn over Then, again,
in such construction there is less re-
sistance in going ahead and also slight
" less resistance in turning corners. |
90 This is done TO save weight as
much as possible 90 Usually the same
lubricating system is used as on regu-'
lar stock cars. A slight difference is
undoubtedly made in the amount of oil
of the motor propOrtionately
more oil is also required. This is ac-
complished by increasing the efficiency
Of the old feed pump The racing motor
must be practically flooded with oil in
order to prevent the scoring OF the
cylinders and bearings. a. The piston
travelling at high speed expands con-
siderably and also holds compression
with less packing The additional
rings increase the friction and tend to
rob the cylinder wall Of proper lubri- !
cial motors the piston is usually tuned
to suit the conditions required.
Motoring Department. The HerOld- |
When running slowly the motor of my !
car hits regularly on but two OF the /
cylinders, while the other two will be Z
dead 1t does not throttle down, but |
runs efficiently on high speed. The
Ignition find in good condition, and a I
large spark is obtained from the mag I
letO at about so revolutions per min |
ute. Can you tell me what the trouble \
with my motor is2-PerpleXed
It seems that your trouble is due to 1
an air leak at either the valves. the /
gaSkets- or the manifold it. /
self Sometimes a slight sand hole in I
the manifold will cause this trouble ]
w Ould suggest that you make sure I
that the valves are seated properly, in \
5pectlng carefully for an air leak. It /
IS assumed that you have tried vari- i
)us carburetor adjustments in order /
10 eliminate the trouble. From what /
you said II would appear that a slight I
" richer mixture is wanted. If there is I
a slight air leak this would impOverish 1
the mixture at slow engine speeds
Motoring Department, The Herald /
understand that il is absolutely necs- I
5ary to determine which is the positive I
and which the negative wire in order I
10 connect them property to the start j
ng or lighting generator. Some bat \
-eries have minus mark for the mega i
-lFe and plus mark denOting the posi-
tive wires, but mine are not so marked. (
how am / to tell which is which,
Amatuer.
A simple way to determine the poles 4
)I a battery is to immense the wires \
eading from the battery or other /
source IN glass Of salt water. Shortly }