what is normal oil pressure for our cars

[way2fastalon]

I was wondering what is normal oil pressure for our cars ...
Im getting at first start up it takes like 20 sec to register on my auto meter Gauge it creeps up to 10 the hits 25 then it maxes out at 75 .

then when its warm it sits between 15-25 then under load it only goes to 40-50 psi under full boost
i can some times hear the lifters not getting enough oil but only when i have driven it hard.. i am running rolla T 10w30 3qts with some 15w30 mixed in about 2 qts

i did take out the balance shafts and cocked the berring oil holes except for one in witch i could not get to budge in the back i took the front shaft with a slightly bigger journal and put that in the rear spot and it was in all the way blocking the oil hole at least i think it is. it did not want move at all after i put it in there i took apart the oil pump to inspect it . did have some scoring in there but i did not think anything of it ...

all the rod and mains looked fine

low oil pressure worries me is there a way to block the relief i think the guy i got it off of may have ported the relief ?

is oil pump dying ?