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Douwe EgbertsEgberts CAFITESSE 300 Service Manual

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Super GT : DENSO SARD SUPRA
Andre Couto
Ronnie Quintarelli
http://www.globaldenso.com/PLUG/
http://www.denso.co.jp/PLUG/
WGP250 : LCR
Casey Stoner
Formula1 : PANASONIC TOYOTA RACING
Ralf Schumacher

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Summary of Contents for Douwe EgbertsEgberts CAFITESSE 300

  • Page 1 WGP250 : LCR Casey Stoner Super GT : DENSO SARD SUPRA Andre Couto Ronnie Quintarelli Formula1 : PANASONIC TOYOTA RACING Ralf Schumacher http://www.globaldenso.com/PLUG/ http://www.denso.co.jp/PLUG/...
  • Page 2 DENSO RACE SUPPO O DENSO RACE SUPPO Automobile Supply TOYOTA F1 Racing Plugs IQ01-31 DENSO Racing Plug GT500 Champion GT500 Champion au Supra au Supra Super GT GT500 GT500 CHAMPION CHAMPION Castrol TOM'S Castrol TOM'S GT500 GT500 CHAMPION CHAMPION Motorcycle 1 Victory 1 Victory WGP125...
  • Page 3 ORT HISTORY ORT HISTORY Corporate sponsor Corporate sponsor Rd.3 Mexico IRIDIUM POWER Debut Win Supply WRC Plugs GT500 Champion Esso Supra Esso Supra GT500 GT500 CHAMPION CHAMPION WGP125 WGP125 WGP125 Masao AZUMA Yoichi UI Toshinaga KUZUHARA & Yoichi UI & Tomoyoshi KOYAMA 7 Victories 7 Victories 3 Victories...
  • Page 4 WRC:SUBARU WORLD RALLY TEAM Petter Solberg WGP125 : AJO MOTORSPORTS Tomoyoshi Koyama WGP250 : TEAM LCR Roberto Locatelli...

  • Page 5: Table Of Contents

    CONTENTS 4-Stroke Engines Types of Ignition System Chapter 1 Outline Role of the ignition System Comprehensive Test Ignition System Configuration Spark and ignition Service Life Chapter 2 Structure How to read Sperk Plugs Spark plugs Types Troubleshooting Heat Range Comprehensive Test Chapter 3 High Voltage Generation Ignition Order...
  • Page 6 Spark Plugs Chapter 1 Study Tips Outline Let us study about the role of the ignition system, its components parts, and its different types. 4-Stroke Engines 4-Stroke Engines Operation of 4-stroke engines The 4-stroke engine was first invented by N. Otto in 1876. So it is also known as the Otto Cycle.
  • Page 7 Spark Plugs Role of the Ignition System Role of the Ignition System The ignition system applies several thousand volts across the gap between the electrodes of the spark plug to generate spark to discharge and ignites and combusts the air-fuel mixture in the cylinder with this spark energy. Igniting at the optimum time for the varying engine speed, load, etc.
  • Page 8 Spark Plugs Chapter 1 Study Tips Outline Let us study about the role of the ignition system, its components parts, and its different types. Ignition System Configuration Ignition System Configuration Ignition System Configuration The ignition system comprises the following parts. Battery Ignition coil Supplies current to the primary coil...

  • Page 9: Types Of Ignition System

    Spark Plugs Types of Ignition System Types of Ignition System Structurally, ignition system can be classified into the following three types. Contact Ignition Type Battery (Ordinary Ignition Type) Ignition switch In this system, the current (primary current) flowing to the ignition coil from the battery is cut Ignition coil off at the mechanical contacts (breaker points) in the distributer to generate high voltage.
  • Page 10 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 1 Spark and Ignition Spark and Ignition Spark Sparking wear When the high voltage produced by the ignition system is applied between the center electrode and ground electrode of the spark plug, the insulation between the...
  • Page 11 Spark Plugs Change in the required voltage The ignition system normally generates 10-30 kV secondary voltage. −300V Voltage rise Spark generation Capacitance spark Inductance spark About 1 millisecond V: Voltage T: Time When the primary At the 'b' point, Between 'b' and 'c' is Between 'c' and 'd' is current is cut off at the 'a' partway through the rise...
  • Page 12 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. ● Conditions that affect The required voltage changes drastically the required voltage with various conditions.
  • Page 13 Spark Plugs The effect on the spark plugs of ignition and combustion of the running engine is severe and various aspects of performance for withstanding this are required. ● Performance required of spark plugs Can withstand sudden heat Can withstand severe and sudden cold pressure changes.
  • Page 14 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 2 Structure Structure A spark plug consists of three main parts, the housing, the insulator, and the electrodes.
  • Page 15 Spark Plugs Center shaft (stem) Housing Glass seal Center shaft connecting the terminal and The housing forms an outer shell that Mounted between the center shaft and the center electrode. surrounds the insulator, supports the insulator to maintain the airtightness. This shaft is made of steel and has the role insulator, and installs the spark plug in the DENSO uses the glass seal method.
  • Page 16 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 3 Types Types Main types of spark plugs Needle to needle Iridium Plug P.16 P.17 P.18...
  • Page 17 Spark Plugs Uses the world's first and the world's ● smallest ultra-fine 0.4-mm diameter iridium tip for the center electrode. This lowers the required voltage and greatly improves ignitability. The inside of the ground electrode ● has a U-shaped groove to secure the large space required for flame core formation.
  • Page 18 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. The electrodes have been taken to the limit of fineness, so the contact area with the flame core is small, the quenching effect is ●...
  • Page 19 Spark Plugs Combining the ultra-fine 0.4-mm ● diameter iridium alloy center electrode with the 0.8-mm square all-platinum ground electrode, spark cleaning pocket, housing end chamfer, silicon oil application, racing insulator, etc. greatly improves ignition performance and extends durability. 0.8 mm square all-platinum ground electrode Ultra-fine 0.4-mm diameter iridium alloy center electrode...

  • Page 20: Genuine Iridium

    Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. Vehicle manufacturer's genuine iridium spark plugs SK16R-P11, SK20R11 SK20BR11 Compared to ● , and , which emphasize performance, this type emphasizes...

  • Page 21: Platinum

    Spark Plugs U-groove Making a U-shaped groove on the ● inside of the ground electrode secures the large volume required for flame core formation and growth and makes it possible to obtain large ignition energy. Since it is possible to reduce the ●...
  • Page 22 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. Platinum spark plugs Example : PK20R11 PK20R11 PK20R-P11 PKJ20CR-L11 These spark plugs have platinum tips welded to the ●...

  • Page 23: Extended

    Spark Plugs Extended J16AR-U11 KJ20CR11 This type of spark plug projects the center electrode ● and ground electrode far beyond the bottom section. Bringing the spark position closer to the center of the ● combustion chamber improves the combustion efficiency. Extended spark plugs can only be installed in the ●...

  • Page 24: Compact Type

    Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 3 electrodes K22PB, W20EPB There are three ground electrodes for increased ● durability.
  • Page 25 Spark Plugs For motorcycle There are various types for different manufacturers ● X24GPR-U X24EPR-U9 and models. Because spark plugs must be used in specific ● engines, it is difficult to make a general (common) spark plug. 19mm Example : X24GPR-U There is a 3 mm shroud at the thread tip and the ●...
  • Page 26 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 4 Heat Range Heat Range Spark plug heat 2％ dispersion The heat that the electrode section of the spark plug receives due to combustion is dispersed through the path in the figure.
  • Page 27 Spark Plugs （℃） 1000 Self-cleaning temperature Pre-ignition temperature Low heat range (hot type) spark plugs Standard spark plugs High heat range (cold type) spark plugs S: Vehicle speed T: Spark plug temperature ( ° C ) Spark plug Spark plug Spark plug Spark plug temperature and...

  • Page 28: Service Life

    Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 5 Service Life Service Life Electrode wear The electrode wears from the locations that discharge easily with spark discharge.
  • Page 29 Spark Plugs Economic service life The physical service life for a spark plug can be thought of as the number of kilometers driven until the spark plug begins to misfire. Misfiring causes not only wastage of fuel, but also irregular engine vibration and output drop. In particular, for vehicles with emissions controls, misfiring can damage the catalytic converter, so using a spark plug all the way to the end of its physical service life is inexpedient economically.

  • Page 30: How To Read Sperk Plugs

    Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 6 How to read Spark Plugs How to read Spark Plugs How to read types DENSO spark plug type names are combinations of letters and numbers.
  • Page 31 Spark Plugs High Performance Plug Thread Diameter and Hex Size Heat Range Reach Reach Shape (Type) Shape ( High Performance Plug Internal Construction High Performance Plug High Performance Plug Thread Diameter and Hex Size Shape (Type) Thread Diameter and Hex Size Thread Diameter and Hex Size Heat Range Heat Range...

  • Page 32: Troubleshooting

    Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. 7 Troubleshooting Troubleshooting Troubleshooting Diagnosing the state of the spark plugs is an effective method for elucidating the cause of engine troubles.
  • Page 33 Spark Plugs Oil fouling Extreme electrode wear Insulator breakage [Appearance] The insulator section and [Appearance] The center and ground. [Appearance] Insulator cracked. electrode section is black and lustrous electrodes are rounded and the gap has [Result] Shorts due to insulation defect, with wet oily deposits.
  • Page 34 Spark Plugs Chapter 2 Study Tips Spark Plugs The spark plugs are critical parts that dominate the engine combustion and bear a major responsibility for higher engine performance. Housing installation screw section melting [Appearance] Thread screw section melting. [Result] Power loss due to engine damage. [Cause] Incorrect spark plug tightening.

  • Page 35: Comprehensive Test

    Spark Plugs ● Corona stain [Appearance] Brown deposites on the insulator directly above the housing. [Result] No impact on the spark plug performance. [Cause] This occurs due to electrical stress in the air near the insulator. (This is not a spark plug gas leak, for which it is sometimes mistaken.) 8 Comprehensive test Comprehensive test...
  • Page 36 Spark Plugs Chapter 3 Study Tips Basics of Ignition How is the high voltage produced? When does the spark discharge occur? 1 High Voltage Generation High Voltage Generation Let us try. (1) Switched on Switched on If you line up the two coils and pass current through one coil (the primary coil), magnetic flux is generated.
  • Page 37 Spark Plugs Reference Switched off Self-induction action When you change the current flowing through one coil, its magnetic flux also changes and induced electromotive power is generated in the coil. This phenomenon is called self-induction action. The induced electromotive power works to obstruct the change in the current.
  • Page 38 Spark Plugs Chapter 3 Study Tips Basics of Ignition How is the high voltage produced? When does the spark discharge occur? Ignition coil This generation of high voltage through such coil self-induction action and mutual induction action takes place within the ignition coil. The ignition coil has two coils, the primary coil and the secondary coil, and their winding ratio is about 1:100.
  • Page 39 Spark Plugs 2 High Voltage Control High Voltage Control Dwell angle control (1) Distributor Dwell angle Energized duration The dwell angle expresses the primary Rotation angle coil energized duration proportion (magnitude) with the distributor rotation angle. When the speed is constant, Small Short...

  • Page 40: Ignition Order

    Spark Plugs Chapter 3 Study Tips Basics of Ignition How is the high voltage produced? When does the spark discharge occur? 3 Ignition Timing Ignition Timing Ignition timing and combustion pressure Until the air-fuel mixture ignites and the combustion reaches the maximum pressure requires a certain time.

  • Page 41: Comprehensive Test

    Spark Plugs Example of 4 cylinders 4-cylinder engine ignition order a) 1-3-4-2 b) 1-2-4-3 Crankshaft position Example of 6 cylinders 6-cylinder engine ignition order a) 1-5-3-6-2-4 b) 1-4-2-6-3-5 Crankshaft position Example of 8 cylinders 8-cylinder engine ignition order a) 1-8-6-2-7-3-4-5 b) 1-8-4-3-6-5-7-2 Crankshaft position 5 Comprehensive Test...
  • Page 42 IDENTIFYING DENSO PLUGS T h e P L U G S C O N F I G U R AT I O N S Needle to needle Iridium Plug Iridium Plug （Example） （Example） FK20HR11 （Example） ZXE20HR13 FXE20HE11 0.55mm 0.55mm Dia. Iridium Dia.
  • Page 43 T h e P L U G S C O N F I G U R AT I O N S Semi-Surface Double Electrode Plug Shrouded Semi-Surface Gap Double Electrode Plug Triple Electrode Plug Small Hex Plug ISO Compatible Small Hex Plug （Example）...
  • Page 44 What type of spark plug is the This is a new generation of high-performance spark plug that uses the world’s smallest iridium center (*1) electrode that is a mere 0.4 mm in diameter. Tapered Cut ■ The tip of the ground electrode has been cut to form a taper.
  • Page 45 Why was the center electrode of the reduced to only 0.4 mm? To lower the required voltage and improve firing performance. The most advanced technology in the world has been employed to enable use of the world’s smallest(*) electrode, at 0.4 mm in diameter, in the The smaller the electrode the more concentrated the electric potential at the tip of the electrode and the stronger the electric field that affects...
  • Page 46 How is the iridium tip of the welded to the electrode? We use all-round laser welding to ensure a highly reliable joining. The 0.4 mm iridium tip that generates the high performance of the is an alloy with a very high melting point. Therefore, ordinary resistance welding cannot be used because the iridium does not melt enough and an adequate weld strength cannot be guaranteed.
  • Page 47 What advantages does the U-groove in the ground electrode have? Ignitability can be improved without increasing the required voltage. (The U-groove is original DENSO technology and a patent for it was acquired in 1975.) To improve ignitability, it is important to allow the good growth of the flame nucleus (live coal) created in discharge.
  • Page 48 What advantages does the tapered cut in the ground electrode have? Ignitability is improved. Also, the heat and vibrations experienced by the electrodes at combustion are decreased, enabling an increase in driving performance. As explained in the answer to Q2 , to improve ignitability, an important characteristic of spark plugs, it is important to minimize the portion of the electrode that comes in contact with the flame nucleus.
  • Page 49 What are the differences between and iridium spark plugs offered as genuine parts by car manufacturers? They use iridium of the same quality in the tip but the purposes and specifications of the spark plugs differ. is a high performance spark plug. The iridium spark plugs offered as genuine parts by car manufacturers are long-life spark plugs.
  • Page 50 What type of material is used to produce the electrode employed for Iridium is the same type of precious metal as platinum. It is characterized by its extremely high melting point and great strength. Iridium Platinum Nickel Gold Silver (Ir) (Pt) (Ni) (Au)
  • Page 51 Why can iridium now be used in electrodes? DENSO is now able to use iridium because of our technology in the field of precious metals, for which we are a world-leader and also because of our advanced laser welding technology. As explained in the answer to Q7 , iridium is an extremely hard material.
  • Page 52 Is the tip in the made of pure iridium? We use a new iridium alloy developed at DENSO. Iridium is characterized by a higher melting point than either nickel or platinum. Therefore, it wears very well when subject to electrical discharge. However, at high temperatures it oxidizes a little too much and so we are unable to use pure iridium for spark plug electrodes.
  • Page 53 Tell me about the firing performance of Use of a ultra-fine 0.4 mm diameter iridium center electrode and a tapered cut and a U-groove in the ground electrode has enabled us to achieve previously unparalleled firing performance in the Ordinarily, the leaner the air mix the more difficult the firing. The greater the ignitability limits, that is the leaner the air mix in which a plug can spark, the better firing performance a plug is said to have.
  • Page 54 Tell me about the required voltage in the The required voltage is reduced by the use of the ultra-fine 0.4 mm diameter center electrode. Recently, there has been a trend to increase the compression ratio to increase output in engines. This means that the required voltage of spark plugs tends to increase and high compression is required in highly tuned engines.
  • Page 55 What happens at idling when an is used? Owing to stable combustion, less variation in the idling revolutions is produced, hence there is less need for 'engine-breathing' during idling. When an engine is idling, firing can become particularly bad. Because the has a low required voltage and high ignitability, sparking continues to work properly during idling.
  • Page 56 What happens to fuel consumption when is used? In many cases, fuel consumption is improved. When spark plugs are used, accidental fire and misfiring rarely occur under various driving conditions. Therefore, combustion is extremely good. In turn, a healthy engine can be maintained and fuel consumption is improved. In the idling examples given in the answer to Q13 , combustion improved and therefore the revolution count increased.
  • Page 57 Does engine performance improve when is used? spark plugs enhances the performance of an engine. Acceleration is improved when compared against normal spark plugs. The 0.4 mm iridium center electrode and the specially shaped ground electrode in an enable a superior ignitability and a lower required voltage than any seen in the past.
  • Page 58 Can spark plugs of other brand-names be substituted with Our spark plugs are compatible with almost all spark plugs manufactured by other companies. spark plugs can replace almost all spark plugs fitted as standard in Japanese and foreign cars. Check for the spark plug you are using in the following table and select the spark plug that corresponds to it.
  • Page 59 What type of cars can current be fitted with At present, spark plugs can be fitted into almost all Japanese and foreign cars. There are 85 types of spark plugs (as of Aug. 2005).At least one of these 85 types will be able to be fitted into almost any car. Does the engine need to be specially set when fitting No.
  • Page 60 How do I select the correct heat-range when fitting to my vehicle? In ordinary cars, use a spark plug with the same heat range as a normal spark plug. In highly tuned vehicles, select a heat range to suit the tuning level of the engine. (Ordinarily, the heat range of a highly tuned engine tends to be colder.) Refer to the following table to compare the heat range of the and other...
  • Page 61 Is there anything I need to be aware of when fitting As with normal spark plugs, install spark plugs using the correct procedure and appropriate torque. Notes for Installing and Removing Spark Plugs Use a spark plug wrench to suit the hexagonal part of the spark plug to ensure that no burring occurs. When removing the spark plug, ensure that no fouling, such as oil on the outside of the plug, enters inside the engine.
  • Page 62 L I N E U P On Sale Spring 2005 IK16L （ ） On Sale IK20L series series series series Summer 2005 IK16G （ ） IK20G IKH16. IKH20. IKH22 IK16. IK20. IK22. IK16L. IK20L. IQ16. IQ20. IQ22. IQ24. IQ27. IW16. IW20. IW22. IW24. IKH24.
  • Page 63 IX-B IU-A On Sale series series series series Summer 2004 （IU20） IX22B. IX24B. IX27B IXG24. IXG27 IU20. IU22. IU24. IU24A. IU27A. IU31A IU27. IU31 ●12mm dia. X 19mm ●The Iridium Power ●10mm dia. X 19mm ●10mm dia. X 19mm length fully threaded versions of the length fully threaded length fully threaded...
  • Page 64 S P E C I F I C AT I O N S ONE PC BOX 2pcs BLISTER PACK TYPE SPEC BARCODE DENSO P/N BARCODE DENSO P/N (mm) (mm) (mm) (mm) (mm) (mm) (mm) (kΩ) IQ16 16 1.1 1.5 3.0 5.5 RC 0 42511 05301 4 067700-8700 0 42511 02301 7...
  • Page 65 ONE PC BOX 2pcs BLISTER PACK TYPE SPEC BARCODE DENSO P/N BARCODE DENSO P/N (mm) (mm) (mm) (mm) (mm) (mm) (mm) (kΩ) IX22B 18 0.9 1.5 2.8 5.0 0 42511 05375 5 067700-9380 IX24B 18 0.9 1.5 2.8 5.0 0 42511 05376 2 067700-9390 IX27B 18 0.9 1.5 2.8 5.0...
  • Page 66 DENSO Spark Plugs Package Lineup Japan Asia/Europe MARKET TYPE PLATINUM IRIDIUM General...
  • Page 67 What type of spark plug is the This new plug from DENSO uses the world’s smallest center electrode , a ultra-fine 0.4mm dia. iridium alloy electrode that provides high performance. In addition, the plug has a platinum on the ground electrode, ensuring the long life of a platinum plug.
  • Page 68 What makes the ignitability of so good? The quenching effect of the plug is reduced by using the ultra-fine 0.4mm dia. center electrode. The electrode also has a quenching (cooling) effect (effect where the electrode takes away the heat of the spark as soon as firing occurs). Therefore, in a thick electrode the cooling effect is large and sometimes firing does not occur as shown in Figure 4.
  • Page 69 How does the superior ignitability of influence combustion? The flame is rapidly spread for quick combustion in comparison to a normal spark plug. By decreasing the cooling effect of the center electrode has on the growth of the flame kernel, forms a stronger flame kernel for ensuring ignition.
  • Page 70 How is the iridium tip of the welded to the electrode? We use 360° laser welding to ensure a highly reliable joining. The 0.4mm iridium tip that generates the high performance of the is an alloy with a very high melting point. Therefore, ordinary resistance welding cannot be used because the iridium does not melt enough and an adequate weld strength cannot be guaranteed.
  • Page 71 What is the difference between , with its 0.4mm iridium center electrode and U-groove tapered cut ground electrode, is a high performance plug providing ultimate running results. , with its 0.4mm iridium center electrode and platinum ground electrode, is a high performance plug with an emphasis on longer life. The ground electrode of the has a tapered cut and a U-shaped groove on its underside, reducing the quenching effect during flame formation and...
  • Page 72 What type of material is used to produce the electrode employed for A precious metal similar to platinum, iridium, a member of the platinum group with the atomic number 77, is extremely strong and has an unusually high melting point. Iridium Platinum Nickel...
  • Page 73 Why can iridium now be used in electrodes? DENSO is now able to use iridium because of our technology in the field of precious metals, for which we are a world-leader and also because of our advanced laser welding technology. As explained in the answer to , iridium is an extremely hard material.
  • Page 74 Is the tip in the made of pure iridium? We use a new iridium alloy developed at DENSO. Iridium is characterized by a higher melting point than either nickel or platinum. Therefore, it wears very well when subject to electrical discharge. However, at high temperatures it oxidizes a little too much and so we are unable to use pure iridium for spark plug electrodes.
  • Page 75 Tell me about the ignitability of the Use of a ultra-fine 0.4mm dia. iridium center electrode has enabled us to achieve previously unparalleled ignitability in the Ordinarily, the leaner the air mix the more difficult the ignition. The greater the ignitability limits, that is the leaner the air mix in which a plug can spark, the better ignitability a plug is said to have.
  • Page 76 Tell me about the required voltage in the The ultra-fine 0.4mm center electrode lowers the required voltage by several kV. Recently, there has been a trend to increase the compression ratio to increase output in engines. This means that the required voltage of spark plugs tends to increase and high compression is required in highly tuned engines.
  • Page 77 What happens at emission when an is used? Emissions become cleaner because the combustion conditions are made stable. Installing plugs eliminates misfires and misspark in all running conditions, resulting in greatly improved combustion. This in turn makes emissions much cleaner. Vehicle: 2000cc 4cyl 4-cycle Operating condition: 11 modes Emissions...
  • Page 78 What happens to fuel consumption when is used? In many cases, fuel consumption is improved. When plugs are installed, combustion dramatically improves because misfires and misspark are eliminated for all running conditions. This improves fuel consumption since favorable engine performance is maintained even when minimum required fuel is being used.
  • Page 79 Does engine performance improve when is used? enhances the performance of an engine. Acceleration is improved when compared against normal spark plugs. The 0.4mm iridium center electrode and the specially shaped ground electrode in an enable a superior ignitability and a lower required voltage than any seen in the past.
  • Page 80 How does the compare to the 0.6mm iridium plugs, platinum plugs and normal spark plugs? provides better performance than 0.6mm iridium plugs, platinum plugs and normal spark plugs. combines an excellent balance of output, stain resistance, work life, starting power and acceleration. Output ( 0.4) Platinum plug...
  • Page 81 Can spark plugs of other brand-names be substituted with Our spark plugs are compatible with almost all spark plugs manufactured by other companies. can replace almost all spark plugs fitted as standard in Japanese and foreign cars. Check for the spark plug you are using in the following table and select that corresponds to it.
  • Page 82 Does the engine need to be specially set when fitting No. The plugs can just replace the ones you take out. itself has a low required voltage and high ignitability and is able to draw out the power of an engine. The superb performance of is obtained merely by installing them in your vehicle.
  • Page 83 How does the compare to iridium plugs from other makers? With its 0.4mm dia. iridium center electrode, the world’s smallest, offers better acceleration and starting than any plugs. The addition of the platinum on the ground electrode results in high performance and long life not seen in the product lines.
  • Page 84 be used to replace plugs with 2, 3 or 4 ground electrodes? Yes. The reason is that the 0.4mm center electrode lowers the required voltage compared to 2, 3 and 4 electrode plugs and provides superior ignitability. < > Required voltage Required voltage decreases as the electrode gets thinner because the electric field strength affecting required voltage becomes stronger.
  • Page 85 Is there anything I need to be aware of when fitting As with normal spark plugs, install using the correct procedure and appropriate torque. Recommended Torque and Tightening Angle for DENSO plugs. Use the correct wrench for the hex on the plug, and be careful not to damage the insulator. When changing, make sure that the oil, etc.
  • Page 86 Can the gap be adjusted? Can I use any spark plug cleaners with the Do not adjust the spark plug gap. Use of a spark plug cleaner for short periods is acceptable if low pressure is used. use a ultra-fine 0.4mm iridium center electrode and the spark gap is already set at the optimum distance.
  • Page 87 What plugs are in the lineup? VQ series VK series VQ series VK series VQ16 • VQ20 • VQ22 VK16 • VK20 • VK22 VK16G • VK20G VK22G • VK20Y • Used primarily for cars • • Used primarily for cars JIS type small plug •...
  • Page 88 S P E C I F I C AT I O N S ONE PC BOX 2pcs BLISTER PACK TYPE SPEC BARCODE DENSO P/N BARCODE DENSO P/N (mm) (mm) (mm) (mm) (mm) (mm) (mm) (kΩ) VQ16 16 1.1 1.5 3.0 5.7 RC 0 42511 05601 5 267700-0740 0 42511 02601 8...
  • Page 89 Next Generation High Performance Plugs for Taxi Improved Mileage Less fuel consumption with a 0.4mm diameter center electrode. Even during idling, when it is easy for ignition to degrade, Iridium Plus reduces mis-sparking and stabilizes idling speed. This results in a quieter engine and improved fuel consumption.
  • Page 90 Unbeatable spark technology fine-tuned for racing ＊ World's smallest 0.4mm-diameter center electrode ＊As of May 2004 The power of the 0.4mm-diameter center electrode harnessed for racing ▲Yoichi Ui ▲Denso Sard Supra GT Reliability and Durability Borne Out by Race Results 55 Types 55 Types 55 Types...
  • Page 91 0.4mm Dia. Iridium, only at DENSO! Specification Includes Terminal 0.8mm All-Platinum Ground Electrode Spark Cleaning Pocket Included with the plug comes with a Compared to the nickel alloy used in Between the center electrode and the insulator, terminal nut compatible to the Nology conventional spark plugs, the high a small pocket has been opened around the tip HotWire and most plug cords around the...
  • Page 92 ONE PC BOX TYPE SPEC BARCODE DENSO P/N (mm) (mm) (mm) (mm) (mm) (mm) (mm) (kΩ) IK01-24 ISO(SLANT ELEC.) -1.0 0 42511 05701 2 267700-1310 IK01-27 ISO(SLANT ELEC.) -1.0 0 42511 05702 9 267700-1320 IK01-31 ISO(SLANT ELEC.) -1.0 0 42511 05703 6 267700-1330 IK01-34 ISO(SLANT ELEC.)
  • Page 93 DIA. REACH RESISTOR FIGURE TYPE FIGURE ● ● ● (mm) (mm) (mm) ● ■ 20.6 BP-E R4304A-□ IW□ ● ■ 20.6 B□EGP IW01/IW06-□ （Note1） ● ■ 20.6 B□EGV IW□ ● ■ 20.6 R4118S-□ IW□ ● ■ 20.6 R4630A-□ IW01/IW06-□ （Note1） ●...
  • Page 94 （ g/km） Internal Data Will output and torque increase if I use Iridium 69.5 70.5 71.5 72.5 Power plugs? 72.7682 70.9184 These are chassis dynamo test results comparing a Vitz 1300 using Iridium Power plugs and another which uses regular plugs are shown below. 72.1660 With the normal plugs, the output is 98.2PS, while torque is 14.8 kgf;...
  • Page 95 I drive a GT-R tuned to 850HP. Would it be Can I replace my double, triple, or quadruple okay to install 0.4mm dia. Iridium Power electrode plugs to Iridium Power or Iridium Tough? series plugs? This is possible. The reason: because of the 0.4mm center electrode The DENSO Iridium Series have the world's thinnest 0.4mm iridium in Iridium Power and Iridium Tough plugs, they have a lower spark center electrodes, but because the durability of the iridium alloy...
  • Page 96 I installed Iridium Power plugs on to my 2-wheel How does the engine respond to changed settings? vehicle. Sometimes when I start it, there is a loud, explosive "pop." With regular plugs this We sometimes hear that "Iridium Power is too sensitive to did not happen.
  • Page 97 The plugs of racing karts are susceptible to carbon Are plugs such as VUH27D and VK24PRZ11 for Honda fouling, but how does Iridium Power do in this case? vehicles available as Iridium Tough plugs? Will they last 100,000km? Also, can Iridium Power be substituted here? We frequently hear that Iridium Power is resistant to carbon fouling compared to Plugs for 2-wheel vehicles with a "V"...
  • Page 100 DENSO PLUGS site English version opened Introduction of the IRIDIUM POWER series PR space This site mainly provides product and race support information. Updated information Basic plug information and Q&A Appropriate information retrieval Movie Master brochure data download A lot of plug information is contained Basic plug information and Q&A are provided.

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