Show CARBURETOR IS AFFECTED BY VARYING ALTITUDES Editors Editor's Note Through Note Through the courtesy of the tho Warden Edwards Parts company com corn pany S. S E. E Matheny an expert automobile mechanic of fifteen years years' experience will answer any questions that local motorists motorIsts motor motor- may wish to ask Queries should be addressed either to Mr Matheny or to The Her Herald HerewIth Herewith Here Here- with I Is ii the first of a series of articles by Mr Matheny 0 o construction op operation operation op op- and maintenance nce of the automo automo- bile By S. S E. E Matheny Of Warden Edwards-Warden Motor Parts Co Tho The first topic that lint I will win dwell d upon In m my series of talks will be bo that hat t of ot car- car We e all know ow what the tho heart means to tho the human body arid and the same relation exists between tho the carburetor and the tho gas engine ensine It is essential that we C have ha the proper mixture to have havo the engine run smoothly to bare havo power economy and efficiency I have havo found as high as 90 00 per cent of oC the carburetors installed Improperly or their specifications changed by some sorno amateur after they havo left leet their respective factories fac fac- tories tories- Tho The carburetor must first be bo properly installed and then adjust PI Ina to In a fit It certain conditions before you can ex expect cx- cx I ex-I to pet get good efficiency out of ot your our engine Tour Your engine may be working uneven or you think the mixture Is not right and you ou think It Is carburetor trouble That ThatIs Is your our first thought Then you OU drive around to some of these called co-called carburetor carburetor car car- experts and tho the first thin thing the they do Is to commence changing nozzles metering pins compensating compensating- jets and so soon soon soon on and the tho only reason that the they do itis ItIs it itis is because they have heard someone sa say that it had too big a L nozzle or Ot jet or else tho the spring was too weak ak Occasionally Occasionally Occasion Occasion- ally aUy you oU will find a good carburetor man but the tho big majority of them are novices and they do so much tampering with carburetors that in the tho end enel the they arc aro be bewildered bewildered be be- nn and turn the tho customer awa away the best LeRt that they know how However on the tho other hand there comes a n time when a change is vital hut but this change should be bo made b by a aman aman aman man who understands the theor theory of or car- car and who is Js a skilled d man in this line Atmospheric conditions have much to lo do with the action of likewise taking tho the en engine lne from sea se level to an nn altitude of feet involves In using air nil in the tho engine engino cylinders at atmospheric pressure ranging from U 14 7 pounds down downto to lo 10 1 pounds to tho square inch Wo We have havo found that the bet best explosive mixture mixture mixture mix mix- ture with tho time gasoline most commonly used is proportioned by 11 about 11 14 parts of air to ono one of or ga gasolIne when maximum power Is 15 desired and about 17 to 1 I for maximum economy Of course this is proportioned by the weight of atmospheric pressure Therefore In In making changes chanres in carburetors we t must get got the benefit of all an the thc carburetor will 1 do do because It If the carburetor is not working in with the rest of ot the engine the the the-fc is no pleasure In running a car and vice versa ers if it tho motor is not working in harmony with the carburetor Always be sure that your our trouble is In the carburetor be before before tie tie- fore ore you attempt an any changes Tho de design de- de sign zig-n of the tho engine has a bearing on the tho carburetor design which explains the tho well known but seemingly mysterious face act that a carburetor giving good results on onono ono one engine sometimes falls fails to maintain its reputation Uon when applied to one of different different dif dir ferent design The i ignition system has a marked Influence on the tho proper working of or an en engine lne as a hot spark is Ig Yer very es es- es Use Ice plenty plent of oC hot air and heat I If you OU have havo a water hot carburetor carburetor carburetor be Le ure that the water lines are connected with the tIme carburetor and if it your our carburetor needs hot air be sure that your tubing is connected QUESTIONS AND ANSWERS Q What hat sized j carburetor should I 1 use uso on my m car How do I tell teU A A. A The Tho sUn elan of th the carburetor is generally determined b by the size of the opening in the manifold manifold manifold mani mani- fold The Tho diameter of tho the intake manifold manifold mani mani- fold being one inch would t call for tor a one carburetor Q What is meant b by A A. The Time mixing together to of gasoline vapor and md air Is II called |