2000 s40 with 12t. can you do a straight 14t swap or do you have to do other mods to support it. will you see any difference using factory fuel system and TCV?

 

assuming you are grabbing a 14t off another model, check out some of the other posts on how to rotate the housing to get it to line up on install. There should be no reason it won't work with the stock set up but obviously there's some upside when you start to add other mods like a bigger down pipe and an ECU tune. You should see a difference in responsiveness but the absolute max boost will be limited by the ECU.

https://volvoforums.com/forum/volvo-...e-notes-80282/

 

its a 14t from Mitsubishi that says it's specifically for the s40 upgrade. Same flange. I could always rotate housing a little. I'm thinking of doing the Upsolute tune but I have to send my ecu to have a chip soldered in that can be tuned. Stock chip can't have data altered apparently. I already did some exhaust and intake mods.