Yep, but since the picture was taken, I've enlarged the hoeles... probably not 2X the inlet still, but significantly more open now at the exit, still have the problem.

The tank has foam underneath it, but the picture does not show it very well. I don't have foam on the sides, putting some there may help me out. I alos have the tank very loosely attached, not rigidly... this helps alot to eliminate foaming too.

I'm hoping to get a run on the enine with a T'couple attached to the head tonight and will post the results.