Im not into all the woosh woosh stuff from a BOV but want to upgrade my stock unit but keep it plumbed back in in to the TID.

do i need to go ReCirc valve to retain my idol ? or
Can i go with a Plumb back and it wont affect the idol?

 

Yes, it shouldnt affect your idol unless your new bov is leaking. There are a couple of bov out there that come as a kit to recirculate, but i am not sure if they make one for the FC.

 

I f you don't want a rich spot between shifts and want to retain stock like flow, go witha recirc setup...

open vented BOVs will cause a rich spot between shifts and can possible screw up idle mixture if the spring is too loose. Ideally, metered air should stay in the system...