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mjan22640 | 10 months ago

The 10psi is still essential, saying 'it's not boost like a turbo or supercharger' is not entirely correct.

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aspenmayer|10 months ago

I guess in some ways that matter they are different. I’m not super familiar with turbo/superchargers, but aren’t they driven by belts in the engine or linkages? I would think that turbo lag shouldn’t happen with a compressed air system, for example.

But to your point, I agree. Once the boost is achieved, the effects of the boost occur, because they aren’t really related to the source of the boost or how it is implemented. However, systems that use the engine for power like turbos may lose efficiency compared to compressed gas at the same boost level, depending on how much the gas system weighs compared to your turbo. It’s an interesting idea, especially for drag racing.

mjan22640|10 months ago

I guess the cooling alone cannot reach the density (and oxygen amount) necessary for the designed power output.

Yes, they put in the energy to compress the air 'offline' and then have that free to propel the vehicle. The cooling of the charge also improves the efficiency, the useful energy output is proportional to the temperature difference before and after the combustion.

A high capacity intercooler would be an interesting experiment also in utility vehicles.