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Back in the saddle again
Join Date: Oct 2001
Location: Central TX west of Houston
Posts: 56,788
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I think a big part of it is what ischmitz said. You can put a huge turbo on a small engine, but then you have to wait much longer for it to spool, and by the time it has spooled you are getting ready to have to shift. I think displacement and rpm have a lot to do with what turbo works best for your engine.
Just a generallization. Say a 3.3L works best with a 6500 rpm redline and a K27, but if you build it so the redline is going to be 9000 at that point I think a K26 or K25 might be better so it is large enough to supply enough flow for that engine speed.
I'm no expert, but that is my understanding of the non technical portion.
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Steve
'08 Boxster RS60 Spyder #0099/1960
- never named a car before, but this is Charlotte.
'88 targa  SOLD 2004 - gone but not forgotten
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