Page 28 of International Auto Parts Catalog 2006 by International Auto Parts

IGNITION BASICS THE COIL The ignition coil is the source of high voltage needed to make current bridge the gap of the spark plug in the combustion chamber. It is a pulse-type transformer, and heres how it works: Inside the coil case are two sets of windings: the primary, several hundred turns of heavy wire; and just inside it, the secondary, several thousand turns of fine wire. These are wrapped around an iron core in the center. When battery current is conducted through the primary winding, a strong magnetic field develops around the iron core. When the flow of current is interrupted, the magnetic field collapses across the secondary winding. As the secondary winding has more turns than the primary, high voltage is induced into the secondary winding. This high voltage then shoots out of the center terminal of the distributor, which is attached to the iron core. The customary ways in which current flow is broken are by contact breaker points, or in later cars by an electronic switching device inside the distributor. IAPs improved wire sets give you fantastic performance benefits at a low price. The latest technology beats the older solid carbon wire sets. All sets include the coil wire. Check out these benefits: Reinforced fiberglass core for unequalled strength and high-temp durability. 100% virgin silicone inner and outer jacket provides heat protection up to 600 F. The insulation is made extra thick, which offers unparalleled protection against arcing and voltage leaks while sealing out moisture, oil, gas and automotive chemicals. Model Item No. Price ALFA ROMEO All 4-cylinder 1956-81, set includes 3 lengths of coil wire: 12", 19" and 34" ...........23037..............$33.25 FIAT, LANCIA 124 Coupe, Spider 1968-71, 1438cc ...............23041..............$23.50 124, 2000, Pinin. 1971-85; 131 all; Beta 1975-78; Scorpion ...............................23042................27.50 Beta, all, 1981-82.............................................23046................23.50 128, X1/9, Bertone, all .....................................23044................19.50 850 Spider........................................................23043................23.75 SPARK PLUG WIRE SETS COPPER CORE SPARK PLUG WIRE SETS FOR BOSCH- INJECTED ALFA ROMEOS Treat your Alfa to a set of our premium performance spark plug wires. Designed for Bosch-injected cars, our sets provide the proper resistance for your car, and include Bosch-type spark plug connectors. Silicone insulation maintains superior flexibility and corrosion resistance. Coil wire included. Alfa Romeo Model Item No. Price Spider, 1982-94...........................................23038 ......................$129.50 GTV6, Milano 2.5 and 3.0., all ....................23047 ........................128.50 164, 1991-93, 2 Cam...................................23048 ........................149.50 Better than Original! Secondary or Output Terminal (-) Primary Terminal Case Primary Windings Secondary Windings Iron Core (+) Primary Terminal 28 Youll find even more parts online at www.international-auto.com IGNITION We carry four types of plug: (A) GOLDEN LODGE Specified by Alfa Romeo for years, the hard-tofind Lodge surface-gap plug has 4 ground electrodes for better spark propogation and combustion. Many Alfa mechanics insist on Lodge plugs. (B) BOSCH PLATINUM The finest single-electrode platinum plug you can buy. The center electrode is 99.9% platinum (melting point: 3200 o), and the extended heat range means the plugs reach self-cleaning temperature just seconds after starting. Smoother running, more reliable starting and better mileage are just a few of the benefits. (C) BOSCH PLATINUM 2 What could be even better than the best-inclass Bosch Platinum plug? The Platinum 2 gives you double the amount of pure platinum in the center electrode, for longer service life, plus two ground electrodes that provide a longer spark duration and optimal access to the air/fuel mixture. (D) BOSCH PLATINUM +4 The ultimate spark plug, with an even purer platinum center electrode, in a surface gap design. The four side electrodes are enhanced with Ytrium alloy, for much longer wear resistance. Weve tested the +4 in both Alfas and Fiats. Theyre everything Bosch claims! Golden Bosch Bosch Bosch Lodge Platinum Platinum 2 Platinum+4 $5.50 ea. $2.95 ea. $3.99 ea. $5.99 ea. ALFA ROMEO Item # Item # Item # Item # 4-cylinder, 1965-71 31501 31507 31512 44774 4-cylinder, 1972-89 31503 31509 31512 44774 4-cylinder, 1990-on 31501 31507 31512 44774 6-cylinder, 1981-89 31503 31509 31512 44774 6-cylinder, 1991-93 31501 31507 31512 44774 164, 1994-95, 4-cam - - - 44174 FIAT/LANCIA 124 Spider, 1968-72 31501 31508 31512 44774 124 Spider, 2000, Pininfarina 1973-85 31503 31509 31512 44774 All Fiat 128, X1/9, Strada, Beta 31503 31509 31512 44774 SPARK PLUGS A B C D A Alfa Romeo

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