Go with what's trusted.. Lol.
I did a used turbo... Wasted 1600.00...
Quite honestly.. if I would do this all again (too bad I cant backtrack), I would seriously go with the following:
1000 cc Injectors (Injector Dynamics)
T4 Garrett Turbo (3" vband with a .68 AR) double ball bearing
T4 Mani (to fit)
3" exhaust mated to a HKS Catback (cat is optional, but its not a fart cannon)
HKS intercooler (not the DM 7M upgrade which is okay, but its a split so performance is questionable (and its CRX)
Stand alone (I am lucky to have a HKS Fcon Vpro 3.3, unbelievable how well this puppy is controlling my engine)
Stock ECU (for idle timings/AC function)
HKS BOV
HKS EVC-S boost controller
Innovate Wideband
Denso MKIV Fuel pump (340 lph?)
DM 7M AFPR
Why?
Because its what I ended with (mind you, I am forced to stick with a SP6262 .68 AR simply because I have a HKS longrunner manifold and everything is setup for that manifold and turbo right now).
Everything works so well (I'm waiting for the replacement turbo) I am just amazed when I sit in the car... However...
I had to go through 2 CT26 upgrades, dicking around with the DM intercooler that wont fit the way its supposed to (You are meant to run it through the intake hole instead of the fender... its really a stupid design in the end because they could have done it right by taking a couple hours to rejig it to fit the stock route without any issue whatsoever)... and then a failed SP6267 used turbo... Now I have a CT26 DDP that I will have to sell (Raptor racing one.. excellent DDP btw), I had to sell the turbos for dirt cheap, had to get rid of the 550's, had to get rid of the Lexus AFM, etc.. etc..
It would have saved me almost as much as it cost me, because I am having a shop do all the work, but in the end, I would have ended up where I am anyway just because its the best route to go.
What I learned through the past 5-6 years and a whole mess of cash is.. the 7M is setup with 25 year old technology. The CT26 has limits regardless what anyone tells you regarding the 400-500 rwhp... its a small turbo so it will run out of breath in the end. The injectors are old technology and the ECU, although its excellent at saving your engine by running pig rich, is old technology and probably a contributing factor for most of the issues with the 7M.
People warned me at different stages that I was cutting corners and all of them were right. However, as my wife says... "you don't trust anything anyone says.. you have to always see yourself... so go ahead... see what happens". Wise woman... she knows me.. lol.
If your going BPU on a 7M, that's excellent! Providing that is all you want. Anything more and you may as well go standalone and do it all up right. Your car and engine will thank you.. as will your pocket book.
Any corner I have cut has had to been uncut. Go with proven...
(unless your a gear head and enjoy doing things over and over.. lol)