Does anyone have a general guideline as to how much displacement a supercharger should have for a given engine size? I see lots of small blowers from Japanese Kei cars on offer for little money, the Aisin AMR500.
They displace 500cc per revolution and are good to 16,000rpm, so with a 1.6 overdrive and keeping it to 10k rpm or less you should be good to go. I've run the numbers through an online calculator but i get only 4psi of boost for the answer. I'm not too sure how much confidence I should have in these answers. Any ideas?