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2. Engine tuning - Wikipedia

   en.wikipedia.org/wiki/Engine_tuning

   Vintage engine testing equipment that can test ignition timing, ignition dwell, manifold vacuum and exhaust emissions. 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 ...

3. Car tuning - Wikipedia

   en.wikipedia.org/wiki/Car_tuning

   A cutaway of a turbocharger, used to increase the performance of an engine. Engine tuning is the process of modifying the operating characteristics of an engine. In a typical engine set-up, there are various mechanical and electronic elements such as the intake manifold, spark plugs, and mass air flow sensor.

4. Cetane improver - Wikipedia

   en.wikipedia.org/wiki/Cetane_improver

   Less engine knock and noise: as the fuel is quick to ignite, it also burns longer, which allows the pressure to rise more smoothly in the chamber; Wear reduction: better combustion leads to minimum deposits and lower engine wear; They offer greater flexibility to refiners to improve diesel fuel quality while maximizing refinery yields.

5. Chip tuning - Wikipedia

   en.wikipedia.org/wiki/Chip_tuning

   Another reason to change the electronic control unit map is if there are engine, intake, or exhaust modifications to the car. These "bolt-on" modifications alter the way that the engine flows, often causing the air to fuel ratio to change. Without re-mapping the fuel tables, some of the performance gains from the modifications may not be realized.

6. Hydrogen fuel enhancement - Wikipedia

   en.wikipedia.org/wiki/Hydrogen_fuel_enhancement

   Arvin Meritor, a Tier 1 supplier of automotive technology, at one time, was experimenting with a plasma reformer technology which would use hydrogen produced from the fuel to enhance engine combustion efficiency and reduce emissions of NO x. [26] This reference states that a 20% to 30% increase in engine thermal efficiency is possible. However ...

7. Variable valve timing - Wikipedia

   en.wikipedia.org/wiki/Variable_valve_timing

   Cylinder head of Honda K20Z3.This engine uses continuously variable timing for the inlet valves. Variable valve timing (VVT) is the process of altering the timing of a valve lift event in an internal combustion engine, and is often used to improve performance, fuel economy or emissions.