Your CIS is a self-compensating system. The metering plate will adjust the fuel delivery due to the increased air flow through it.
I would never fiddle with the fuel distributor to adjust the fuel system pressure. The warm up regulator adjusts the fuel pressure based on vacuum/pressure at the manifold. That is where you should start.
'85 930 Factory Special Wishes Flachbau
Werk I Zuffenhausen 3.3l/330BHP Engine with Sonderwunsch Cams, FabSpeed Headers, Kokeln IC, Twin Plugged Electromotive Crankfire, Tial Wastegate(0.8 Bar), K27 Hybrid Turbo, Ruf Twin-tip Muffler, 8:41 R&P