the additional lift may have bottomed out the plunger in the lifter and now the valves are being held open even at the point on the cam where the valve used to be closed. Sounds like you may need some kind of spacer between the bottom of the rocker and the rocker stand.
What brand of rocker? If they're Scorpion rockers then you need to put the washer on the bolt with the chamfer side towards the head of the bolt and then put it in the rocker.
Reply With Quote