If you build the bottom end with all forged internals how much boost can you run if you leave the compression ratio at 10:5:1.

 

depends on if you have an intercooler or not and if so what size.
i would say non-intercooled up to 8psi(safe wise)
intercooled up to 12
intercooled with meth/alcohol up to 16 possibly 18.
swap your heads to trick flows(64cc) and boost it to 25

 

you didnt give enough info for anyone to even give you a decent ballpark figure.

size motor, cam, intercooler, melt or alky, heads, etc etc

brook