RCMAN46 wrote:
A diesel is regulated by fuel, not air'
Not totally true as if it were a turbo charger would not be needed.
Both gas and diesel if you want more power increase the air flow much more difficult than adding more fuel which is very easy.
A turbocharger is not needed on a diesel. A diesel just benefits from a turbocharger since it allows it to utilize more air to burn the fuel better thus making it more efficient and powerful. There have been (and still are in some applications) many diesels that do not use turbos. The Ford 6.9L and GM 6.2L are just a few examples.
