Injecting prior to turbo comp' impellers

[leman_opc]

Thanks for the detailed explanation on this.

Based on what you say I assume with preturbo injection the result may be close to the following options:
1. Boost decrease but virtually no gains in air consumption (in case of restrictive hotside being an issue), or
2. Unchanged boost but increased air consumption (in case the hotside may still flow the increased air mass)?