How would these improve my EJ207 Bugeye JDM STi?
Hi I think they are more appropriate in the bolt on tech but the bolt on forums do not include EJ207 -
Anyway, I am not sure which turbo is in this JDM engine (??VF30) but the turbo hardly spools until it hits 3500 rpm then there is at least one second lag and then some pulling rushes in mildly and then you get swept by a tornado at 4000rpm and within a whiff it has hit 6000rpm and you are in decline from there ...
Currently completely stock running RON98 fuel. Apart from large bore catback exhaust (I am told by previous owner). I live in a remote place and have no subaru tuners. THe only turbo shop in town told be AHA just install a boost controller - that suggested they know crap all ..
How do I make it spool earlier?
1) Change to catless uppipe? - what does that achieve and does it need ECU retune
2) Change to catless downpipe? - what does that achieve and does it need ECU retune
3) Others? JDM piggyback chip (where to buy?)