been thinking about this for a little while, how exactly would it work?

would the charger feed the turbo, turbo feed the charger or would they kinda work side by side and the charger disconnect at a certain rpm when teh turbo is fully up and running?

just thinking it would be great to have 20psi from 1500rpm or so upwards rather than having to wait till 3500rpm or later.

i wouldn't be wanting to compound charge in order to gain top end power just low end torque

I imagine the charger would kick start the turbo. I think this is how the Golf GT engine works, but I'm not that familiar with it. I have well over 20 PSI at 2000rpm. (yeah I know, different engine type etc :P )

but your car only revs to 2001rpm :P

Have a look here....

Installed my supercharger today! - Normally Aspirated with bolt-on Forced Induction Powertrain - NASIOC

Installed my supercharger today! - Page 32 - Normally Aspirated with bolt-on Forced Induction Powertrain - NASIOC

Unless you've got days to spare, start reading somewhere around post 797.

He started with an Eaton supercharger. Then he added a turbo.

I think the way it works is..... Air into turbo compressor and out through the supercharger, then through the intercooler and then into the throttle body/plenum. So the s/c is sucking air through the turbo.

J.

The TSi in the Golf GT is very complicated. I was fortunate enough to be given a VAG promo video of how it works, pretty impressive.

On the TSi the supercharger is driven with an electromagnetic clutch so at a given time the clutch disengages and the turbo takes over.

Summary - it's been done before, so it's possible.

The mechanical supercharger runs at low speed, and the turbo-supercharger joins in as revs rise.

Try a web search for Lancia Delta 038 to see a well-known actual application.

I've tried looking on tinternet and found very little of any use so far.

I've tried looking on tinternet and found very little of any use so far.

Of the superchargers available, roots type - Eaton etc... and Lysholm screw - Opcon Autorotor etc . Both will make boost at low revs and supply it more or less immediately, unlike a turbo. The Lysholm screw types are the more efficient and compare quite nicely with turbos. The Eatons of course, get ripped off many a MINI to make way for something a little bigger.

IMO the ideal would be a Lysholm screw blower and a HUGE turbo.

J.