Sequential turbos w/ anti surge ring??

Maybe I'm not getting the picture right here, but I would think that you would need to have the larger turbo feeding the smaller turbo to have it work right.

Here's the scenario:

Ambient air at 1 atm pressure + large volume
==> large turbocharger
==> air at 2 atms pressure & medium volume
==> Intercooler (natch!!)
==> smaller turbocharger
==> air at 4 atms pressure & small volume.

Since the low pressure air (ambient) would have a greater volume, you would want the larger turbocharger to handle that, and the smaller turbocharger to handle the small volume but more dense air.

Hi, that sounds kind like a compound setup that you're describing. My setup would have the compressor outlet of the smaller turbo feeding the inlet of the larger turbo, in attempt to lower the boost threshold, provide more low end power, and help spool the larger turbo (by means of producing more exhaust at lower revs). My main concern now is how the larger turbo will take to having air forced into its compressor fins w/ the anti surge ring also allowing air flow to the sides of the fins.