Alt. light flickering at high rpm???

yes I did look for the AC voltage and it s ok
dont remember what it was friend hade the multimeter in is hands
less than 1 volt

why when the car ask more AMP or electricity should I say
every thing seem to be ok

thing that use more electricity than the oe

-Holley black fuel pump
-fan ( ferd contour set up )
-msd 6al
-sounds system with a big BIG amplifier but the radio is off when
it do this weird thing