RE: engine shutting down on take off
i think you are to lean!! If the low end was to rich it would load up soon as the throttle was advanced for take off. If the plane is right on the edge of being lean and the accelerates it is harder for the fuel to get to the engine add in the pull up and the g load increase's and further leans the engine.
the other thing that might cause this is a pinched vent line. as the fuel is with drawn from the tank no air can get in and the tank forms a vacuum and cause it to go lean.