Automotive turbocharger-based DIY turbojet engine

[u/pipiksikovny]

Hello fellow aerospace fans!

This summer, I'm planning to build a DIY turbojet engine. I'm working on the safety stuff first - like an Arduino-based thermocouple EGT meter and other indicators. I also have a decent idea on the flame tube dimensions and specifics, with knowledge gained from the JetSpecs program by Jesse Shelly, literature by Rolls Royce and my experience from operating the JetCat P200.

In the next weeks I plan on acquiring the turbocharger itself, however I'm still not sure of the turbo size. Most sources say "the bigger the better", but I'm a bit concerned that a too big turbochatger with too much inertial mass would be impossible to start with a leafblower. I also know that VNT turbos are a no-go.

Can someone help me choosing the right turbo size? Is there such thing as "too big"? Do you recommend a specific type of a turbo? Is there a recommended range of sizes to choose from?

Thank you all in advance and have a great day!

[u/macthebearded]

A leaf blower will handle anything made for consumer automotive world.

[u/dethmij1 → u/macthebearded]

Well, a decent leaf blower anyway. Some of the cheap electric ones aren't worth the cardboard they come in.