John is correct. Bruce added the staging/compounding rule when he was the head tech guy. In the SCTA rulebook staging/compounding is the same thing.
DW
Dan
My rulebook does not have the word ''staging'' in it. Staging is part of supercharging, turbo compounding is'nt. No compressed air goes into the engine.
JL222
I think it's a difference in semantics that is causing a problem. In diesel pickup lingo:
Single - Normal.
Sequential - Two turbos, one does low CFM boosting, then the other does high CFM boosting. This is to increase the effective map range. New Ford is one.
Twinned or Compound - A big charger feeds a little charger to generate more boost than a single will.
Parallel twins - For those need a lot of low pressure air augmented by nitrous. Very rare.
Detroit diesels aren't diesel pickup engines, they are super-turbocharged in a compounded layout. The turbo feeds the supercharger to amplify boost.