- Aug 25, 2006
- 4,436
In paul's setup - under vacuum the engine vents normally but filtered through the Provent. Under high engine loads, the PCV valve is closed and his added check valve to the driver's side PCV hose prevents normal engine ventilation via the front of the throttle blades. The side can only be used to suck air into the crankcase. This will cause the crankcase pressure to build up until the pressure relief valve in the Provent vents blow-by into the engine compartment. This sound like the best way to connect only one Provent. If you used 2 of them then you wouldn't have to vent into the engine bay.
Based on the understanding as shared you are correct; IMO there would only ever be a need (if at all) for one for the passnger side. If one is installed on the driver side with NO check valve one would be fine however I have never seen signs of oil being drawn through the TB
All the best with your prject
Shadowman