Show NE E EFFICIENCY ERCE ARROW i SHOWING 3 Show Exhibit Brings Brings' Out Fame of Dual Dual- Valve Six I I Ii I i Ta valve e engine engino efficiency is seen highest stage of development in Arrow Arrow ce Arrow passenger car displayed I auto show this week Because of ot Ined through the the astonishing trance nee ance of the tho perfected engine the Arrow ed Pierce Arrow dual valve valve- six ee to io command chief interest at hibit ui an n engine that answers every Pf t the driver says M M. r. r D. D Naylor r Of the 1 M L D D. D Naylor Na-lor company It can crawl along an hour and suddenly spurt Wing ng speed it can hold steadily to dat at four tour miles an hour and windshield up It can ase ase as- as steepest e hill with a a. powerful mithat that frees the minds of r m anxiety ells eis Us a a. mechanical reason of for forthe the remarkable increased sed flex- flex B ower and speed of ot the dual dUll valve cause there are two exhaust and ke valves for each cylinder innone in- in none fone each the breathing ca- ca of each cylinder is Increased ly Dead gases which if It not ex ex- would contaminate and Ithe Incoming g explosive mixture ure I perfectly Likewise a a. full vapor is assured through h l le Ie Intake valves i striking g of all is the fact tact that beO be- be I O per cent increase In engine i llcy as compared with former enith enith en- en I ith similar stroke and bore the he engine is I. far tar more economical line consumption In fact tact the to 11 H per cent in ln the tent ht horsepower model and v in the thirty eight horse- horse Ize of power the identification of Arrow crow cars aa as thirty-eight thirty and tent ht horsepower models gives give no noon on oni of the force torce that actually Is ls Jed d. d d The actual horsepower de- de I. I is enormously greater than that dv riving ving to refine the tho performance engine which for lor nearly two years ven ven en satisfaction to thousands row engineers have havo bettered th the to eo that it insures an running of ot the engine and degree of ot reliability Instead of magneto tery-magneto system which was walt I to synchronize a special dual dual I f system y tem has hM been perfected b. b by byrrow and I Deleo Delco engineers This tern tem which uses two sets of ot spark park and two timers independently yet In exact unI- unI bl bles s the th engine to accelerate filly dlly and to run Tun more positively peeds I which features the is in ln the transmission now is accomplished with 1 o ot possible formerly This This- Is h J Jom noticeable on steep rp hillo in om m a higher to a lower gear can be made noiselessly Jy ty from fourth speed to third Icar car is speeding speeding- at a rato rate of ot tan an n hour e stock models on display W Is IB convincing proof f of the Arrow Pierce he policy of been upheld Both the third thir- thir d id forty-eight forty horsepower mod- mod nt it the final note In motorcar I 1 shown is a a. standard forty forty- ower power six passenger touring I I nd ad finished expressly for W W. of f Rock tock Sprin Springs s Wyo |