carb timing problem

[greenrt_se]

when my otor is fully warm,and i hit(fast) gas to the floor ,then there is blown from the carb,carb is Demon 750 mechanical,ignition is MSD ready to run dist and msd 6al and blaster coil .initial is 10 degrees whit blue(light) msd springs and blue bushing (21) also my mechanical fuel pump show
8 psi pressure,,the cam is 223/228 0,050 

[Chryco Psycho]

first 8 psi is too high , set it down to 6
generally a misfire when punching the throttle is a lean condition install a larger squirter & see if it improves

[greenrt_se]

thanks,now it seems ok,I add more initial timing(16deg) and also make fuel return line now the fuel pressure is around 6 psi,hope at that also help my last summer problem( when shut the hot motor  and try to start it after 45-60minutes is don`t fire up..fuel coming from the carb(no vapor lock)