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Referring to the act of calibrating the Engine Control Unit (ECU) or Powertrain Control Unit (PCU). This is done for better performance, gas mileage, or to allow the components of the vehicle to run better after modification.

3 votes

Tuning cars from the 90's and prior

One of the most popular modifications on pre-injection cars is conversion to multiple twin choke carburetors. For example Weber DCOE carbs. Typically this involves changing the inlet manifold which …
Steve Matthews's user avatar
20 votes

How do these similar engines differ so much in power output?

Cylinder capacity is only a small part of the story when it comes to engine performance and tuning. …
Steve Matthews's user avatar