Warbird Information Exchange

Neither aircraft is pressurized anymore. There isn't a need to and neither aircraft has working turbos.

In a nutshell, you duct an excess of pressurized air into the cabin. The supply of air could be tapped off of a supercharger or turbocharger, or an electric pump, or bleed air from a turbine's compressor section. Actual cabin pressure is then regulated by an outflow valve (or in most cases, more than one) which controls cabin altitude by means of an automatically variable leak. Regulating outflow instead of inflow compensates for all the various leaks in the pressure vessel.

Hope that helps!

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does that mean, if your turbos are shot out that you will lose pressurization?

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That's right.