Divided vs Open Exhaust Housing Dyno Results?

[xDiesel03]

I searched and couldn't find anything specific other than a faster relative spoolup on a divided housing. Has anyone done any back to back dyno testing to show the results changing from an open housing to a divided housing? The closest thing I have found is the Hardway Performance Steedspeed gated vs non-gated test that shows the difference when the pulses are completely isolated. I would think one would experience similiar results going from an open to a divided exhaust housing on a divided manifold. Thoughts?

Bill

 

[CurtisEmery]

Depends on the application. Most of the very large frame chargers I have seen are open housings.I would take a dual entry for the manifold charger iff at all possible and the a/r wasn't a compromise. In a compound arrangement a single entry would be ideal for the atmosphere charger. There is no gain to a dual entry housing in that situation.