Lockheed L-1000 (XJ37)

[KJ_Lesnick]

Correct, as gas turbines have continuous combustion.

That's not what I meant.  What I was talking about was piston engines using turbochargers and superchargers.  Superchargers tend to require higher octane and tend to be more prone to detonation than turbochargers.

Turbojets don't have that problem at all because they use a continuous combustion

[wuzak]

Correct, as gas turbines have continuous combustion.

That's not what I meant.  What I was talking about was piston engines using turbochargers and superchargers.  Superchargers tend to require higher octane and tend to be more prone to detonation than turbochargers.

That is incorrect.

Detonation depends on a number of factors, but how the air is compressed before hand is not one of them.

The air temperature is a factor, which depends on how much compression is being used and whether intercooling or aftercooling is used. Two stage Merlins used both - the supercharger voultue had cooling passages, while the outlet air passed through an aftercooler (often referred to as an intercooler).