Supercharger and turbo charger

[MrFluffy]

Nick Mann's Manic Beattie had a APU (second motor) to drive the turbocharger. If your into rv8's his name might be a bit familiar, that minor is one of my all time favourite vehicles ever. You can hear the secondary turbine start up in this vid.

Theres more ALS systems out there with each their own propnents, big bang, injecting nitrous to spool faster etc. I just fancied a twincharger setup myself, and for me I'm more interested to build what I'm interested in technology wise than cookie cutter stuff with the sole aim of winning.

 

[MrFluffy]

Worth a skim if your wondering about the different types of supercharger mentioned too. Namely the roots and derivatives (most eaton's, including the ones with helical vanes), the centrafugal units eg rotex mentioned by pete, and the screw (lysholme) type. The tvs eaton roots are more efficient until about 16psi, then the screw units bypass them and can pump at far higher pressures without loss of efficiency, at 30+ psi a roots blower would be heating the intake charge to the point of causing detonation.
http://www.superchargersonline.com/index.php?main_page=page&id=7

The vw twincharge system mentioned earlier is the g-lader units, they are yet another type, a scroll supercharger :-
https://en.wikipedia.org/wiki/G-Lader

Mazda released a licensed from lysholme & built by IHI screw type supercharger in some variants of the millenia/xedos, but it was because they used a miller cycle engine which leaves the intake valve open longer and relies on the supercharger to provide initial compression for a 15% efficiency improvement a bit like how the split single blown two strokes worked. Really unique production engine.
https://en.wikipedia.org/wiki/Mazda_Millenia