El Paso herald. (El Paso, Tex.) 1901-1931, 1914-02-28
copyrigbt, les. by W. B. Stewart. d.

{ coil system the roller OF the timer should
just be making contact with the segment.
When these parts are set in this manner and
the wires attached in sequence according
TO the order Of firing, you should nave ap-
prOXimately one-third retard action and two
thirds advance action to the spark This
is sufficient for ordinary purposes. When
timing a magnetic the One-third retard &C
ton is not necessary, but when timing the
battery system it. is best TO have this mar
gin Of safety.
The exhaust cutout relieves any possible
back pressure Of gases. If muffler is
properly designed there should be no back
pressure. 1t is estimated that a motor viii
develop from 8 to percent more power
without the muffler. In racing motors and
other high speed engines there must be a
free exit to the exhaust, OthrWise the burned
gases viii back up into the cylinders and
Ioul the incoming charges. For. ordinary
with properly designed exhaust pipe and
muftier no cutoff is necessary except one
likes to hear the noise.
Motoring Department, The Herald have
a two cylinder car. Just had the cylinders
rebOred, new pistOns and rings made; had
the transmission overhauIed at the machine
shop, il being a planetary type. What
would like to know is that when I take OFF
the drive chain or jack up rear wheel
1 can start IL with ease, but otherwise I
have a deuce Of time getting it started.
man tells me it is in the differential which
turns Zee enough. G. F E
1t appears that the trouble lies in the
ulL1erenllal- me Iact that everything is all
right when the drive chain is removed is
conclusive evidence that the trouble lies back
OF the transmission While one section Of
the differential may work freely with one
wheel lacked up, nevertheless this does
not indicate that the differentiaI as a unit
is in good reDair 1T sbouId NOT he a 5if
hcult matter TO locate the trouble in the
rear axle .sypstem. Would suggest that Won
jack up both wheels and try each wheel
separately and also the whole axle as a
Motoring Department The Herald
Would you advise the use Of compound
consisting of equal parts Of wood alcohol
and carbon disulphide for removing carbon
rom a nouorE Can this preparation in any
way harm the motor? X R. Phillips
The writer has had no experience with the
compound you mention for removing car
bon. These mixtures seldom prove salts
factory It is not a difficult matter to re-
move the carbon by scraping- With the
piston placed at top dead center and the
valve caps removed, most Of the carbon
can be removed by means Of scrapers and
method IS rather a slow process. neverthe-
less II is practical and safe. The oxygen
process OF removing carbon has proved quite
satisfactory ana many garages are now
equipped with facilities for doing this work
at very reasonable cost.
Motoring Department, The Herald-Tn- de-
scending long hill should one use both the
loot and emergency brake or just the foot
brake2 Reader
In descending a hill the driver Usually
coasts controlling the speed Of the car by
the service brakes It is good practice to
The service brake is the one most used:
therefore, when opportunity offers it would
The term emergency does not sDecfaIIv
apply to cases Of emergency, but is rather an
extra set Of brakes for use should tbe SER
vice brake fail to hold at any time The
driver must exercise judgment in the use Of
good condition.
Motoring Department The Herald-Is
there any value in using chains on the front
as well as the rear wheels2 l. p r
Chains on the front wheels facilitate steer
ing in bad going A chain on one front
wheel viii answer the purpose well under
ordinary conditions to prevent the front
wheels from skidding