sounds like you've got a nice ride there... can't wait to see pics
if you've got a highflowed turbo you won't need 18psi to make some good power
i made 206kw on 9psi on my 46 trim ct26
make sure you have all the basics done properly first
since you're going 550's and having the mods you've got more than likely you will have fuel cut issues, so get the lexus afm as well to help sort out fuel cut
get pics!!! hehe