KeyserSoze

Ok, here's the deal I had a turbo'd gsr @7psi then my rings went. I have a log style manifold with a t4 flange. The turbo was a garrett ta3405 (s-trim comp). I decided to rebuild the block with better components so that I could have a nicely powered street/strip car. I am shootin for ~350-400whp. The block has been built the right way with eagle rods, je pistons, fully balanced, line honed and federal mogul race bearings. When I decided that I would go for more power I had the comp wheel on the turbo upgraded to the v-trim (so now it is a t04b with v-trim wheel and 60 a/r comp and o-trim wheel and 58 a/r turbine).
This is the compressor map: http://64.225.76.178/catalog/compmaps/fig7.html

The stock flow of my engine is 287 cfm = 19.83 lb/min, and I am most likely going to run a PR of 2.02 (15psi). When I plotted the v-trim I used 105% for peak rpm and even degraded that at lower rpm for the other points on the plot (85% for vtec and 80% for 1/5 of max rpm).

I have heard from some very reliable sources that this turbo is not very efficient for my application (even though I will be using boost control via AEM ems) if I am trying to reach 350whp and that the turbo would be really lazy even with the 0-trim turbine wheel. I was told this since the turbo has an approximate max output of 35 lb/min (although at PR = 2.02 the engine flow will only be 1-2lb/min higher). So, what I need is help deciding which option I should go with.

1) Should I sell the garrett v-trim (60a/r) comp with 0-trim (58a/r) and the manifold to get a manifold w/a t3 flange for either a t3/t4 hybrid turbo or most likely a holset hx35 (as I have heard that these are VERY good turbos), or a garrett to4e 57 trim (this was also suggested though it was made clear that the turbo would be slightly lazy on the street).
2) Run the garrett turbo with the manifold.
3) Find a way to adapt the t4 flange to accept a t3 turbine housing, so I can get rid of the garrett and get a hx35. Is this possible to do without welding a new flange on? Though I guess I could weld a t3 flange on as we have tig, mig and arc welders @ work. BTW, the manifold looks to be mild steel.
4) Side note can the hx35 be ran with a t4 hotside housing, and would it greatly increase the boost threshold?

Here is my setup:
light pnp
crower valvetrain
cranecams (itr spec)
victor x
balanced block, line honed, bored .020" over
9:1 comp
je pistons
eagle rods
federal mogul race bearings (main and rod)
aem ems
3" exhaust, cat, flex

Sorry for the nub question, but I am new and still trying to learn. TIA for any help.

KeyserSoze

Bump for info.