Which of these 2 turbos should i buy

[boosted91crx]

Hi guys, I am back again for help, I have narrowed it down to 2 turbos, i was hoping some one with some knowledge of the two could help me sort it out. the first one is this one
Forced Performance: DSM 18G-6SL2 Turbocharger
and the second is this one
Modern Automotive Performance :: DSM :: Turbochargers and Accessories :: Bullseye Power :: Bullseye-Power T04B V Trim Bolt On Turbocharger
from what i understand both will bolt are direct bolt on replacements for my big 16g.
My car is a honda CRX, i run a 1.6 liter SOHC d16zc motor. the big 16g i have now is maxed out and its time to upgrade my turbo, o2 housing and injectors. which reminds me while im at it is this a good o2 housing or should i just go with a tubular one?
Modern Automotive Performance :: DSM :: LIPP Cast Stainless Steel O2 Housing (DSM)
i know my cars not a DSM but you guys are a huge help any way. by the way here are a few youtube links of my car for yah to check out.
YouTube - My CRX going 12.5
YouTube - 90 Honda CRX Si turbo, 0 to 130+ MPH
I look forward to getting and advice i can from yah guys.

 

[dsm-onster]

The same explanation as to why a 57 trim works great on b18 hondas but leaves a lot to be desired on the dsm. Maybe the fact that regardless of how much peak flow a turbo has, the larger the wheel you put in the smaller housings, the less efficient they become. And maybe a little turbo honda experience. Im not saying I know everything but all of my dsm turbo experience I brought from my turbo honda background. I did that for quite some time and still tinker with them some. Ive only had my dsm since '99 but I had my turbo crx from 96 to 2002. I had as many different turbos on that as I have had on my dsm.

Oh! so the influence a compressor cover has becomes more apparent in a better flowing honda engine. Yea, more than one around here has complained about 57-trim spool characteristics and many seam to think that the 57-trim should have similar peak flow as a 50 trim when it actually only flows 45 lbs/min at best. A honda engine typically has alot more rev range, less traction, and lower pumping loss. Which a slower spooler won't spool so much slow, and more power can be extracted from it. . . Anyway, we do both initially agree the 18g is the better choice because it is less laggy than the v-trim.

 

[boosted91crx]

i think i found the answer, i called slowboy racing and they can build me a bastard 20 g that will bolt in exactly the same as my big 16 g does yet will flow 650 cfm i am going to have them do the wastegate flapper upgrade and port it all real good. also gettting them to port me out a gen 2 o2 housing to replace my stock gen 1 housing.