850 Ultra XP lean bogs when secondaries open

Just bought this carb as soon as i try to open secondaries it lean bogs. Played with jetting running a plug in the rear now throwing jets at it still bogs 408 W2s 12-1 650 solid roller. Indy 360 intake. It idles fine just wont transition . stock jetting 84-84 with 4.5 power valves Im at 88 primary with valve and going to try 98 rear. It just seems excessive.