delta complex objects

how does everyone print complex objects like the one blow on their delta printers? The problem is that the bowden tube needs more force to push plastic so the temperature need to be higher to compensate for this. The higher temperature doesnot give the plastic enough time to cool even with a 50 mm fan blowing at full force. And if i lower the temperature the filament gets stripped because the force needed to extrude gets too high..

Such models are a breeze to print on my mendelmax with a all metal hotend.. but on the 3dr with a bowden and a j-head the quality is either crap with droopy loops and strings or the model fails mid print...

any ideas or suggestions ..

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