Gear Head

iTrader: (2)

I recently purchased my 4th impreza after a break of nearly 6 years and it is good to be back.

Now, although I have always said that I wouldnt modify it........... I do keep looking at threads regarding VF35 and VF43 upgrades.

What I don't want to do is have to upgrade this and that just to achieve a bit more punch. I'm not a boy racer, I don't go through brakes or clutches and I do drive with mechanical sympathy. In fact I treat my cars like babies!

So, I was thinking of upgrading the turbo and getting a conservative map.

Am I setting myself up for a fall?
Car has only done 58k and is running a sports cat stainless system but that's it.

Any advice appreciated.

And please no 'you should have bought an Sti' comments. Been there, done that. Just want a stealth motor.

Reshard1977

iTrader: (17)

LOL "No should have bought an STI comments" its sad that has to be said, but rightly needed. I'm in the same boat.

On my 2nd scoob and drive and treat my car like you by the sounds of it.

The first hurdle before tuning your scoob is to decide what you want from it, a quick spooling road car with little lag, of the fun of a bit of lag but a nice kick in the mid power band. Once you've got that you can start to decide the mods you need, want.

I went from VF34 to twinscroll VF37 to hybrid TD04, i was always after a quick spooling turbo, but decided that actually top end doesnt matter much for me, so i'm happy with late 200 horses, as long as it spools as quickly as possible.

One thing is guaranteed, it will be fun figuring out what best fits what you want, and you will get a lot of conflicting info from peoples experience, but its all part of the fun right!

the shreksta

iTrader: (20)

you will need

sti injectors £100 ish)

sti top mount (£120+ ish) + sti scoop under tray

fuel pump (hrc are about £60)

maybe a decent panel filter (cosworth etc)

you may benefit from an sti inlet manifold to delete the tgv's (£60)

vf35 for 330-360bhp £250-£300

hybrid td04 from scoobyclinic (sc320) for a very quick spooling turbo £495 exchange

hope this helps

p.s dont forget bigger brakes or at least decent discs and pads

the shreksta

iTrader: (20)

oh and a full decat would be a good idea and maybe some ported headers from alyn @ as performance

bugeyejohn

iTrader: (11)

I would just decat the exhaust have a remap and enjoy the extra 25% of bhp/torque.

Reshard1977

iTrader: (17)

And a map from a reputable mapper :-) £350+

Gear Head

iTrader: (2)

In all honesty, I do like the quick spool of the td04. Always have done.

Regarding the injectors and intercooler, would I actually 'need' them to achieve 300+ bhp? I was under the impression that the Newage wrx intercooler is quite a step forward from from the classic sti top mount. How much bigger is the Newage sti intercooler than the wrx?

Kedlestone

iTrader: (9)

Your be lucky to get 300+ out of a WRX TMIC IMO, same goes for the injectors. I'm running a VF34, 550 pink injectors, full 2.5 decat, APS CAI, Walbro fuel pump all off a simtec running AL and LC, 346.9bhp 320ftlbs. The spool on my VF comes in pretty early to be fair and keeps screaming all the way up the range. I to am mechanically sympathic to the car especially baring in mind the gearbox and transmission running that sort of power and torque on OEM parts.

Gear Head

iTrader: (2)

Considering I'm only running around 220-230bhp now, even if I get around 280 bhp with similar torque, that will suit me quite well. So thinking about it, may be just a remap will do the job.

Is there a lot of benifit of an ecutek map over an open source?

Kedlestone

iTrader: (9)

Yeah price! £350ish for ecutek and roughly £250ish for open source. On a serious note I don't know if there are any performance benefits, I had an open source the first time around via Duncan (dynaracemix) and had no issues. You will notice the extra power, had a good drive out afterwards If your happy with sub-300bhp then yeah I'd just get a remap to suit.

Gear Head

iTrader: (2)

I've been quoted £650 for ecutek by a respected mapper and £350 for open source. Would just like to know why ecotek is so much more expensive.

jura11

iTrader: (7)

Hi there

If you are happy with 300bhp and like spool of the TD04 then I would stick with TD04 and get mapped.With yours spec you should able to make nice 270-280bhp(300bhp is possible from TD04,but this is rare)

If you want go above 300bhp,then I would go down the rote of the TD05H(16G),VF28,VF35,if budget allow then V34 is best from the bunch

VF43 is not really suited WRX,they're more suited 2.5L or 2.0L STI

Yes as above injectors you will need too,Fuel pump,3 port boost solenoid

STI TMIC not sure,you will see benefit above 320-340BHP,if you want keep bellow 350bhp then WRX TMIC should cope,if not then STI TMIC can be best if not then FMIC will be best choice

Then remap,depends on budget,difference between the prices is mainly down to EcuTek licence,if yours ECU have EcuTek licence you will pay only £350,if not then you will pay £650,But mostly if you will buy ECU which have EcuTek licence you will end to pay full price for remap(£650)

Jura

Gear Head

iTrader: (2)

Ok cool, so there is no real performance benifit from ecutek over open source?

jura11

iTrader: (7)

In my view not

Open Source has have more and more features which are unavailable over EcuTek for WRX owners

Jura

Gear Head

iTrader: (2)

now to find a mapper that doesnt mind open source in Kent....

jura11

iTrader: (7)

As I said previously speak to Neil@ Slowboy racing,he mapping the cars via Open source,we are used Neil previously when we run OE ECU and we are been very happy with the Neil mapping

Jura

bugeyejohn

iTrader: (11)

The last time I went into it all open source was £350 and ecutek was £500 but that included the licence vat and the use of a dyno.