huwjones Posted November 28, 2014 Share Posted November 28, 2014 I finally picked up my 2015 STi last Saturday, here's a good excuse to post a pic... So six days and 490 miles in, my local dealer phones me today and says that Subaru are now offering a 40bhp upgrade for the STi! The car has to go into the dealer, they remove the ECU and sent it away for a re-flash. The power upgrade leaves the warranty intact too. Great news, in my opinion, as I had already mentioned that I was looking at upgrades. However - the upgrade costs £1600. EDIT: Turns out this upgrade isn't being offered for the 2015 STi - It's for the previous generation STi. They missed that boat, I think! Now, for just a re-flash it seems very expensive. I'm wondering if there may be more to it than that - i.e. a new fuel pump and/or breathing mods. Has anyone else heard of this, and do you have any more details? I was planning on fitting an equal length manifold, cold air intake and then an independent remap. This would probably come out at a similar price but void the warranty. It would be great if the engine can get a 40bhp gain even before touching the exhaust! Starting to tear apart the sofa now to see if I can find some pennies in it! 1 Quote Link to comment Share on other sites More sharing options...
Sparky Posted November 28, 2014 Share Posted November 28, 2014 Hi mate sorry i can't help on the details but very interested to here more about this proposed 40 bhp upgrade I want I want Quote Link to comment Share on other sites More sharing options...
awebb320 Posted November 28, 2014 Share Posted November 28, 2014 Not heard of this, what dealer was it? Quote Link to comment Share on other sites More sharing options...
Highspirits Posted November 29, 2014 Share Posted November 29, 2014 Was tempted by black but decided mine had to be WR Mica Blue! not seen anything online or from dealer on upgrades but would be interested to hear more although the missus might whinge lol Quote Link to comment Share on other sites More sharing options...
huwjones Posted November 29, 2014 Author Share Posted November 29, 2014 My dealer is Brookside Garage on Anglesey. From what he said on the phone, it was just a matter of sending the ECU away. I'll pop over tomorrow to see if he's around to provide more details. Quote Link to comment Share on other sites More sharing options...
Jay762 Posted November 30, 2014 Share Posted November 30, 2014 I think you already have equal length headers on your motor as standard - from 2007 (sharkeye) onwards I believe they had them on from factory Quote Link to comment Share on other sites More sharing options...
huwjones Posted November 30, 2014 Author Share Posted November 30, 2014 There aren't equal length headers on these - otherwise you wouldn't have the subaru trademark flat four noise. The ELH sounds boring but is good for power. Quote Link to comment Share on other sites More sharing options...
Rick 2014 Posted November 30, 2014 Share Posted November 30, 2014 I would think the fuel pump would be fine if its a new car.subaru wouldn't put a pump in if it couldn't handle a bit more power.40bhp is hardly a massive difference but noticeable.What bhp are these from Factory Quote Link to comment Share on other sites More sharing options...
huwjones Posted November 30, 2014 Author Share Posted November 30, 2014 I think these are quoted as 305PS, so probably a little under 295bhp. A higher pressure fuel pump could be fitted to bring down the injector duty cycle. The standard pump could probably cope, but the injectors would be closer to their max duty. A fuel pump is much cheaper than injectors. Our cousins over the pond are upgrading injectors at approx 380bhp but normally the modification 'roadmap' doesn't involve remap first (intake> exhaust> remap> fuel pump> injectors> another remap). Didn't get to the dealer today, will give them a phone call tomorrow. Quote Link to comment Share on other sites More sharing options...
Rick 2014 Posted November 30, 2014 Share Posted November 30, 2014 To be fair 300bhp is rapid anyway.i think duty cycle will be at 75% from factory so you would get away with it anyway. Quote Link to comment Share on other sites More sharing options...
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