Out of interest though, no matter how fast an electric fan spins it will never really make boost as it is only ever pushing air but never compressing it like a conventional turbo/supercharger? Because that's the theory right? to compress air using a mechanical or electrical method? I've scratched my head about this for years and never found anything to push me to doing such a project until I come across this This is a vortex c15 supercharger but I still don't fancy sticking £500 in to one. 😏 I'm so intrigued to see how well this turns out so please persist with it buddy and the best of luck to you sir 🙊