4agze 15psi

[AE80Rollaguy]

Hey all, i recently put a pulley kit upgrade on to my 4agze which boosts the pressure to around 14-15 psi, every thing is running fine bar 2 things, it is pinging, and when its at full boost it gets to about 13psi and then feels like its lacking power up untill 15psi... i have an adjustable fuel reg ready to go on, will this fix that problem?? and when i do the timimg...i asume i should retard the timing a lil, but as the crank pulley is way bigger than stock i had to mod the timing cover that has the timing marks on it... not there any more... wouldnt be able to see them any way, so when i retard the timing should the revs drop? or rise??

Eg, retard-idle drops advance-idle rises

 

Much help welcomed

 

Cheers tory