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Wow, I had no idea the N1 was so big. Sorry for the misinformation. I guess they (N1s) must be either 75 or 80mm then.
Just how big (small) is the S13s stock T25 turbo? I've never seen it in person. My daily driver (VW MkIV GTi) has a KKK K03 turbo which is TINY (literally the size of your fist for both compressor and exhaust housings) and was wondering how much bigger the T25 is.
I ask because 2.5" piping has been proven to give better gains on the K03 than 3" piping -- which is "too big" for the small turbo.
Thgere are those who swear that bigger is always better, but I happen to subscribe to the contrary opinion.
If the T25 isn't much bigger (at all) then I imagine 2.5" piping may be better suited to the S13 SR20DET's stock turbo, too.
Just something that occured to me.
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