a few q's about my setup
 

i have a d15z1 with a ihi rhb5 turbo and ive got a few q's.

firstly i made a adjustable internal wastegate and its set to 5psi i think but i fitted a bleed valve and it will not get anymore than 5psi?and it feels to me like im getting alot of lag it starts spooling at 2500 but hits 5psi at about 4 to 4500?? also if i dont run a vac line to the wastegate it still is 5psi?is this normal when having a adj wastegate?Also ive got a apexi safc and i not sure how i should set the correction ,its got a fmic but stock injectors.also whats a good a/f ratio for a turbo d15?.Lastly my clutch is sliping will a oem clutch be okay or should i get a heavy duty?