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With the 2.8" pulley you should be way the hell up there in boost. You have got to be getting serious belt slippage or your cam is not allowing it to build boost. How much belt dust are you getting?
Have you upgraded your pulley system to an 8 rib or are you still running the 6 rib system? There is an IW 8 rib setup in the members FI for sale section that should help you out.
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 UNDER CONSTRUCTION......again...... |