Contour Enthusiasts Group Archives Forums Modifications Forced Induction Roots style blower for under 500 bucks?

i had a 1991 vw corrado g60 rebuilt "stage 5" g-ladder "supercharger" running 22psi never had a prob. with belt slipping.only problem was throwing rod bearings and breaking my valves after about 5 months of total abuse. stock it ran a 15.4 after about 2 grand it ran a 13.7 on stock radials and stock trans. cost to much to keep it running and door handles allways broke

I actually looked into what it would take to drive an eaton m62 with a hydraulic pump/motor arrangement. Needed about 30 hp to drive it. The problem was that the only affordable pump / motors that I could find were extremely heavy and also only got to around 85% efficiency. So, I would be taking a huge weight penalty and wasting 10-12 HP to drive the supercharger with hydraulics and the fabrication was going to be just as complicated.

You didn't size the hydraulic pump & motor correctly then. A hyd pump/motor will be ineffcient if turned at too high of RPM. You typically don't want to spin both more than 1000 RPM. You should check out Parker pumps & motors. There are different types of pumps and motors too. Gear pumps tend to be affordable but they are inefficient. Piston pumps are very efficient but expensive. You also have vane pumps which seems to be the happy medium. You can also run pumps in tandum for high & low rpms. Again, probably over kill but I'm sure if sized properly, you can run a blower hydraulically and economically and efficiently.