Well we ordered a bunch of stuff for the turbos exhaust fabrication Tues. Today I got the sad news that these turbos I have are not suitable for LSR Instead of the BIG DD 60 turbos I have the S 400 350 HP stationary eng version---great if you want a 700 hp + or - street eng
But all is not lost-- the big single Garrett I have is good enough for the shake down blow through 468 & 496 I have most of the parts for---this will get me started then when we find if this thing will go straight---we can then MAYBE we can spend the big bucks for the KILLER turbo and put it on my good eng and shoot for the BIG marbles!!!!
Probably not useful for what you're doing, but some minor experience info:
Borg Warner S400's come in many flavors and are a favorite of sled pullers. Easy to customize, lots of parts, cheap. These are where I started at.
Not sure of the math, but here's what a S475 is:
Cheap drop in replacement for a Garrett GT4202 (102mm compressor exducer, 75mm inducer). Map and interface dimensions almost identical. Has MWE groove, but is not gated. Must run external gate for gas apps. I don't run wastegates.
With 403ci at 4000 rpm, it makes 50 PSIG boost on a diesel.
IIRC, I tested the S480 also (80mm inducer), but for the life of me I can't remember the results. Then Garrett sponsored me, and I stopped using BW's. The Garrett equiv made 798rwhp at 4800rpm uncorrected through an Allison trans, or about 1100HP at the crank SAE, at 58 psig. It wasn't at full output though.
I think I have both 475 and 480 sitting collecting dust.
I'm running various Garretts from 4202 to 5533?
Note: Even running 1800F EGT's and overspeeding (way off the top of the map), I've yet to injure either big BW or Garretts unless I barked them hard and repeatedly.