my car is losing alot of oil no spots underneath car when siting. smokes a little black which is rich. but i cant figure out where all my oil is going. im losing about .5 every 500 miles

it is untuned

mods all new

oem pr3 pistons
all oem gaskets seals and rings
crower 404 cams
crower springs and retainers
ported head
unorthadox pulley
act prolite flywheel


so is this normal?