Hi guys we have a boat with a 2300R model blower on a 1UZFE Lexus 4 Liter V8.
Our problem is that we dont make any boost until close to 4000rpm (wide open throttle is around 5000rpm at 8lb boost)
We have tried a smaller charger pully which upped the boost to around 11lb at 5300rpm, but still no positive boost below 3800rpm............
We would like to see boost at 2000rpm and get 13lb at 5500/5800rpm.
The Lexus crank pully is 5 1/2 inch, what should the charger pully be???
Any help would be greatly appreciated

Mike