yes, very true dave. alot of to4e guys go above 18 psi.

theres a big thread on a national nissan forum with some overlays comparing some common turboes, with some of the newer garrett GT series turboes. the 50 trim still rocks way up past 18psi, but we found that technically a GT30 would have a slight advantage with higher power goals. i dont plan on more than 450. ever. i will be happy with 350/350.

i think a z31 t3 would be one of the best bets for his setup though. better up top than the t28, not sacrificing too much lag/down low either. rebuilds are cheap, can get the turbo itself for <$200 usually. comes with the o2 housing usually so you can just drop in the o2 sensor and fab up a lower dp.