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Hello everyone I'm new to this site and I would like to know what turbo i should to make at least 450hp it's a 00 s40 with a fully built engine and thinking about boring the cylinder sleeves to 85mm or at least 84mm I've been looking at Garrett turbos any ideas please let me know ok thank you
 

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You need to contact VulvasT4 or Sute on volvospeed. IIRC they're both pushing their S/V40's upwards of 700hp and they would give the best advise on the combo you're looking for. Nobody on swedespeed mods the 4cyl's.
 

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Also, overboring the block is a very bad idea. You'll likely crack it running high pressure even if it is built up with rods and pistons.

For high boost on the 40 series you'll want an 81mm block from a T4. You'll also want to shim the block, and use 81mm pistons with valve reliefs (for fitting better cam), and upgraded forged connecting rods.
 

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Ok thank you does anybody know how to contact sute or anybody else making extreme power on a 00 s40
I'd get an account on volvospeed and send him a private message.
 
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