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Just want to update this post. First off, please read the entire thread before posting (i.e. rosecuvee.)
Best exhaust size would be 2.5 inch piping all the way back. Any bigger will hurt the I4 as not enough backpressure is produced. ven a turbo'ed I4 will not benefit much from anything bigger than 2.5 unless your talking aout 10+ psi of boost.
And as I have discussed numerous times, FSZE is intended for NA application as FI is more suited to the FS03. No one has sucessfully turboed an FSZE...EVER.....not here and not in Japan. Theoretically it can be done, but most people have enough of a hard time getting the damn thing running let alone do anything to it.
Tuboin at any PSI is more recommended on a low compression engine than a higer compression one. There is no point having high compression if you are using FI. Kind of like having a big horse when you intend to buy a car. There is a reason why most FI from factories comes with 9:1 or less, no FI engine i know of from a factory ever comes with anything higer than 10:1 (excluding high price exotics or one off builder, i'm talking about regular joe cars here.)
As for adding Nitrous (yes you can call it a NOS, nitrous oxide system, an acronym, not just a company, like SCUBA. But it's "a NOS", not "NOS".) And a 50 shot is recommended. a 35 is sufficient but a 50 is way better. You don't really risk anything with a 50 as it is just as safe as a 35. And who doesn't want more power.
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