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Discussion Starter · #1 · (Edited)
I want to change the turbo I have it's a gt28r (gt2560r) off an s15 silvia which I have right now on my 2.0. Since I'm building the whole thing - wiseco, pauter, head job) I'd like to change to a 3076r but I can't understand which a/r should I use a 0.64 or a 0.82. Can you give me some advice here? Thanks ppl
I'm planning on boosting 15psi daily and 20-22 racing. I think that will make around 450hp but I don't know what to do with the a/r
 

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It really depends on what this car is used for. If you mainly want fun factor on the street with occational racing then the .64 A/R is what you want. You'll make some decent power and will spool fast (though 450whp is going to be pushing the limits of that turbo period).
 
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