Help!

I've got a Vmar extreme stick - low wing with a Super Custom (SC) 46 and a 10x6 prop.

The plane flies beautifully, and the engine runs lovely until............ I flick the plane with full elevator travel..... and the engine quits........every time! The engine and the tank are in the positions prescribed by the ARTF instructions, although the tank does seem to be low in relation to the main needle......could this be the problem?

Or have I simply set the rates too high and no matter what the position of the tank - it will always cut with the given rates due to the excessive g-force?

Any suggestions?