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Engine tuning is the adjustment or modification of the internal combustion engine or Engine Control Unit (ECU) to yield optimal performance and increase the engine's power output, economy, or durability. These goals may be mutually exclusive; an engine may be de-tuned with respect to output power in exchange for better economy or longer engine ...
Though by tuning primarily by EGT and air fuel ratio values, EGT is still to this day a used data output for engine tuning. When fine tuning an engine, if possible with the ECU manipulation with the cylinder's timing can be made. By adjusting the timing, the resultant cylinder temperature can be used to improve cylinder efficiency.
MAFless tuning is a popular modification in Australia for Holden vehicles powered by the General Motors LS1 Gen III 5.7 V8 engine. The genesis for MAFless tuning of the LS1 in Australia was the HSV GTS version of the Holden Commodore , which was factory fitted with a Callaway-developed C4B version of that engine running in MAFless mode.
However, this effect occurs only over a narrow engine speed band. A variable intake can create two or more pressurized "hot spots", increasing engine output. When the intake air speed is higher, the dynamic pressure pushing the air (and/or mixture) inside the engine is increased.
Erhu – two-string vertical fiddle, standard erhu D4, A4 tuning. A second erhu is sometimes used, known as fanhu (反胡) or fan erhu (反二胡), meaning "counter fiddle" or "cross fiddle"; it has thicker strings tuned a minor third (B3, F4#) or fourth (A3, E4) below the leading erhu; Pipa – pear-shaped lute with four strings, uses standard ...
The gaohu is similar in construction to the erhu but has a slightly smaller soundbox, commonly circular, and is tuned a fourth higher, to G4 and D5. Whereas most huqin are placed on top of the left thigh, the traditional gaohu is played with the soundbox held in between the knees. It has a brighter and lighter tone as compared to the erhu.
Liu Tianhua (simplified Chinese: 刘天华; traditional Chinese: 劉天華; pinyin: Liú Tiānhuá; Wade–Giles: Liu T'ien-hua; 1895–1932) was a Chinese musician and composer best known for his innovative work for the erhu. Liu's students, such as Jiang Fengzhi and Chen Zhenduo, continued to contribute to the development of the erhu. [1]
The common Zheng Diao tuning sets "do" to approx. "F 3" and tunes other strings relative to that to give C 3 D 3 F 3 G 3 A 3 C 4 D 4. Gusli: 9 strings 9 courses. Standard/common: E 3 A 3 B 3 C 4 D 4 E 4 F 4 G 4 A 4. Крыловидные гусли Russia Tuning varies; this is a common traditional tuning