Is there any standardization for stage 1, 2, or 3 engine tuning?

You've probably heard about the three "stages" of tuning, but what do they mean? And is there any standard definition for ...
SpaceNews

Engine computer problem delays first SLS launch

Work to replace a malfunctioning computer on one of the four engines in the SLS core stage will delay its first launch to at least March, NASA announced Dec. 17. NASA/Cory Huston WASHINGTON — A ...
Transport Topics

EGR, Computer Are Main Sources of Problems with 2008 Engines, J.D. Power Survey Finds

This story appears in the Sept. 20 print edition of Transport Topics. The main problems owners of 2008 heavy-duty engines have encountered involve the exhaust gas recirculation system and the engine ...
Hot Rod

Budget Cyberpower: a Computer Engine Simulation Program Anybody Can Afford

The unfortunate thing about most engine simulation software is that it costs hundreds of dollars, and is out of the realm of the average hot rodder. Now, there's an inexpensive alternative. HOT ROD ...