BlackGMC build take 2 - Turbo Time
#610
Mod with training wheels
iTrader: (16)
Yeah, energy delivered to the turbine is a function of cylinder air mass and RPM. Some people forget about RPM, I guess.
Loading a turbo via gearing is just about slowing down engine air consumption to get into the right part of the compressor map. Choosing high rear gear ratios to 'load' a turbo is just a bandaid for having a ton of turbine and not enough compressor. Otherwise, the engine would draw air mass too quickly and end up skating along the bottom of the compressor map and eventually dropping boost. Basically the same reason a turbo that's capable of 900hp on a small engine only makes 600 on a big engine.
Loading a turbo via gearing is just about slowing down engine air consumption to get into the right part of the compressor map. Choosing high rear gear ratios to 'load' a turbo is just a bandaid for having a ton of turbine and not enough compressor. Otherwise, the engine would draw air mass too quickly and end up skating along the bottom of the compressor map and eventually dropping boost. Basically the same reason a turbo that's capable of 900hp on a small engine only makes 600 on a big engine.