24V solved my problem
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Well i think my quest for enough cooling has been finally completed , after many attempt , version and all , swapping the heater from 12volt 40watt to 24 volts 40watt , i can now fully utilize all fan at 100% power and the nozzle keep up with a .8mm nozzle . Doing a benchy now to see the difference versus last few print , then i think i will do a bridge test . i always had issue before with bridge because not enough cooling .
here a picture from the cad software of my head with the e3d chimera and bl touch