Modified ignition system the easiest and most inexpensive first step is to replace the original spark plug performance models. The basic role of the spark plug is forced (boot) ignition coil high voltage generated by the current produced by an electrode gap spark to ignite the gas mixture cylinder combustion chamber, and therefore the performance requirements of the spark plug is certainly spark stronger, more stable and better.Shock Absorbers Since the ground electrode of the spark plug center electrode insulator (housing) and the high pressure between the high temperature and have excellent insulation ability, so for most alumina-based ceramics, but the high-performance model of the spark plug in the material of the electrode is much attention. Now mostly use high quality spark plugs iridium or platinum (platinum) and other precious metals to manufacture electrodes, in addition to a stronger and stable spark issue, but more than the ordinary copper-nickel alloy models durable times, but the price is also a form of multiples rise. On the other hand, another important role of the spark plug is to take away the heat in the cylinder, in order to maintain a suitable operating temperature (500-850 ℃). If the temperature is too high wear and tear and the electrodes of the spark plug insulator, and was red-hot temperature will lead to early spark ignition and detonation phenomena; Connecting Rod but if the temperature is too low, the spark plug attached to the surface of the oil can not fully burn, easy to form coke, so even weaken the effectiveness of the spark plug does not produce sparks! So different degrees of hot and cold (heat range) of the spark plug can be used on different characteristics of the engine, in order to maintain the normal operation of the spark plug. Cold type spark plug - the higher grade (Note the different brands of spark plugs may have a different standard label) of the spark plug due to rapid cooling for high-performance engines are often in high speed (high temperature) work, and the slower the cooling heat type spark plug (low grade) is applicable to low-low compression ratio of the engine. In a typical power conversion under mild degree cold without changes to the spark plugs, engine often operate at high speed only after heavy modification, only need to switch to a higher degree of cold spark plug,http://www.maxspeedingrods.com/h-beam-connecting-rods.html just use the car only with cold type spark plug will manufacture coke, appear weak and make the engine speed ring true phenomenon. Therefore, under the other conditions remain unchanged, only the cold once the spark plug replacement and will not bring any results, unless the driver drove within 80% of the time regarded the engine speed is maintained at 30% less than before the red zone! Issue after the "modified combat" describes Bora 1.8T modified car, we replace it and make big turbo for other modified only with a cold spark plug once it ...... owners believe that the general was only a cold spark plug replacement, I feel pretty good response, the main reason is the psychological effect, coupled with the old spark plug already aging sake.