Ok sorry for being the guy that asks stupid questions but Im not really turbo literate.
S366 uses a T-3 pedestal right? Whereas a S464 uses T-4?
Which is bigger T-3 or T-4 and how do either compare to stock?
T-4 is bigger and will flow more
I see comments about the 464 being small....which is bigger 366 or 464?
S366 is a 66mm compressor, S464 is 64mm compressor , but turbine wheel is bigger/ higher flowing in the S464 so ...................
I assume the 475 is one step up from the 464....does the 366 have a "big brother" ?
, S475 is 10mm bigger than the S464 so its a little more than 1 step , HTT makes a 70mm S300 but that is as high as it goes in the S3 frame
How do any of these turbos compare to the GT40 or GT42 turbos?
too broad of question to really answer , there are over 10 turbo's to compare to answer that question, and cost differs greatly
I also get the impression that a S366 is not as upgrade friendly compared to a S464....Why?
The S400 chassis the s464 uses is the same chassis as the S475, S472, S480 , ect so a simple wheel and cover swap and you can turn the S464 into any of the above , cost to upgrade is 500ish if i remember right and no changes needed to the install kit, the S300 is not a big enough frame to go much larger that the 66mm and plus its limited by being a T-3 , still a great turbo but I like the S4 frame for its flexability
Again sorry but I kinda doubt Im not the only one here with these questions.