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Discussion Starter #1
Hi,

I current have a 2018 STi running an Arashi ball bearing TD06SL2 20G 8cm on Tomei EL header and full exhaust, I get 20psi around 3600RPM which I find slow, what's a good TD05H 20G to get?

I thinking of just getting ball bearing Arashi TD05H 20G 8cm if I can't find anything better
 

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that's funny...I have the kinugawa journal and get the same spool time...I went with the 11 blade exhaust to try to help out with the spooling...I think the only way you might be able to reduce it is to get a smaller exhaust side, but that will of course reduce your top end...
 

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smaller hotside, as Jedi3 said.

A td05 will spool faster than a td06sl2, which will spool faster than a td06h.

You choose fast spool or higher top end.

20 psi by 3600 RPMs is pretty good in my opinion.
 

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could also spend significantly more and get variable hotside turbo...eg variable vane...Porsche, koenigsegg and others have a few designs out there!
 
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