Arizona republican., 1920-06-13
FUEL EcoNoMizER

All motorists know thax gasoline is [ higher in price than it ever has been | before and that the limit may nat have [ been reached. They also know that | each time gasoline goes up il price a f new fuel saving device comes on the | market, and each one seems to do a f little better than the one oefore. All | sorts of figures are given To prove the | claims of the device. Iu one case in | upper New York state a car was said | to have gone ninety miles on one gall | Ion of gasoline. Before purchasing a so-called economizer the driver or owner should consider many things; 1 he should not take the claims of the maker for granted: he should reason It out and see if the fundamentals of the device would produce the claimed results. Ever since the beginning of the industry devices of this kind have been offered, but more particuIarly in the last few. years have so-caEed air valves and air appliances been brought to the market in varying numbers. One concern introduced an ordinary air Salve which was screwed into the in Glke manifold. The device cost about 10 cents to make and little more to market. It was sold on money back guarantee at $5. They made over a million dollars on this device after paying back a few thousanl dollars for returned devices. Owners didn't like to have the manifold drilled and tapped and the QeN1cG put Ill pidce only to remove it again an1 plug the hole. Rather keep the device, which they did. The makers were students of psychology and sold thousands upon thousands of the devices. Strange the device would live up to it's claims in a great many cases. especially where Sbe carbureter was of old design or where the adjustment was poor and the ln- strument normally fed a rich mixture.
 The reason for air appliances is sim pie. They simply introduce air into the mixture either above or below the throttle and dilute the mixture in pro- portion to the air admitted Some times hot air is introduced; again 1t IS cold air, depending on the device
 If the carbureter is set to supply fairly rich mixture, or if there IS some Arrangement in the carbureter--a worn needle, high float, etc.) to feed too much gasoline in proportion to air, then the car shows a high fuel con sumption Now under these condi- tions a device might show gain which will startle the owner. For example, if the car now is giving ten miles on gallon and the extra air admitted will bring this to fifteen, you gain an additional five miles on every gallon, and YOU are satisfied. Now, suppose that you yourself test the device on q nice level road where acceleration is not demanded, where hill climbing is not needed and where prformance means mere running at 20 miles per hour or any other fixed speed. Natur- ally it will show low fuel consumption. So will the car without any device show a higher mileage. 1t will sur prise you if you make a test of your car. as is, and adjust the carbureter for a very lean mixture Running on an ordinary paved road you can cut the fuel down to a startling degree Warm the engine first. then cut down on the fuel.
 With a fixed setting of the needle ar without a nozzle change as is neces sary in some carubreters. the intro duction of air into the manifold amounts to cutting down the fuel a the nozzle. With a fixed air openlni vou cannot get any more air into tn manifold than the. air opening per rnits but you can cut down the gaso line at the nozzle either by adJustmen or nozzle substitution For 1T tn engine uses less gas by the introdue ton of air. hot or cold, into the lntah manifild. you can get the a~aoltlons ~ air. that is change the mixture pro nortions by cutting down on the Iuei This is the basis of carbureter adJus' ynant If you cut down on the air yo automatically increase the fuel suppl and vice versa. The Tact thar neat
 used to break up the fuel IS put or smaI1 factor in economy. Our gase 1fne is moi so bad as some would haN motorists believe. It is bad 10 e1.~a hut modern carbureters handle
 fasrI1y well under the circumstance a55 thing to be remembered Is tn' every carbureter supplies hot ar / :, a matter of fact if vaporlatloh car. can affected without hot air all the bette for then the voIumetric efficiency
 +ba engine is not affected and you g
 more power out Of the engine.
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