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Old 03-17-2019 | 08:47 PM
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fyrstormer
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Originally Posted by Broloff28
I just discovered this thread and it’s pretty entertaining to read. I’ve always wanted to attempt something like you were talking about. I even went as far as to buy a keychain turbo (not a supercharger but close enough) but it was never going to make boost so I gave up. I think this summer when I’m not so busy with school I might try to draw something up in cad. If you designed it right you could 3d print a turbine and make a centrifugal supercharger. Maybe I’ll try that on my magnum xl-52 four stroke
Doing it over the summer when you're not busy with school sounds like a great idea. Let me tell you what will happen if you decide to wait until you're finished with school: Assuming your education has anything to do with your natural interests, it's entirely likely you'll never work on personal projects in that field ever again. I haven't written code for personal use in over a decade; I get all my code-writing kicks actually doing work nowadays, and I turn screwdrivers for fun instead.

In the meantime, you'll want to find some way to measure airflow so you can see how much air the engine pulls-in when it's naturally-aspirated, so you have some idea how much air your supercharger setup needs to be able to move. As a guideline, your supercharger setup will need to be able to pump 150% as much air as the engine intakes naturally, to generate 7.5psi/0.5bar/0.5atm of positive pressure inside the engine; if it can't pump that much additional air into the engine, the engine will probably experience a net power loss from driving the supercharger. You'll also need to move the carburetor upstream of the supercharger to avoid the additional complexity of needing a pressurized box surrounding the carburetor and a fuel tank capable of retaining the same additional pressure without leaking everywhere.

Unless you happen to have all the right equipment sitting in your garage, you're looking at months of occasional work to make this prototype. Best to start on the easy bits now.
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