scoobydan1985

is it possible to change a wrx intercooler for an sti intercooler and would i recive any benefits from it and would i have to have the car re-mapped cheers for the help
dan

Rez

iTrader: (2)

Watching with interest as this is on my ever growing mod list..

scoobydan1985

lol i just serviced my car and noticed the intercooler is looking old so as im gonna change it is it worth getting an sti one lol

wiley

iTrader: (63)

A lot of Subaru owners do the top mount swap. I guess because it's larger, it will make a difference. Pointless just changing the intercooler without doing other mods, once you've done a few mods a remap is definitely worth doing

Wiley

scoobydan1985

it has a few mods larger fuel pump,straight through exhaust no cat,prodrive pack,induction kit and dump valve all been remapped to them mods so would it benifit me to change intercoolers and what would i benifit
cheers
dan

I Catman

Yeh, just done my hawkeye and one of the best mods iv done,
car gos alot better all together

trevsjwood

iTrader: (2)

people usually upgrade the top mount and turbo together, very little benifit in doing the IC on it's own as the standard unit copes well enough with the td04 turbo.
Trev

jh1-2009

Iff you could stretch to a better turbo as well as Sti top mount you would gain quite a few horses once remapped.

Gear Head

iTrader: (2)

What year is the Impreza in question?

wilbo

iTrader: (1)

The intercooler has been changed on my 05 blobeye but it was done before i bought the car so cant confirm if it provides any gains

BrownPantsRacing

iTrader: (6)

Changing from WRX to STI top mount will not add power by itself. No real point unless your changing the turbo too and going over 300bhp.

Don’t need a remap to swap the intercoolers. But will need one if your fitting fuel pump, or turbo or other bits too.

BrownPantsRacing

iTrader: (6)

p.s. make sure you also fit the STI scoop under tray otherwise you will be worse off than standard WRX intercooler.

No point having large STI intercooler with tiny WRX undertray.

jono300

iTrader: (8)

Always thought the intercoolers on the wrx / sti was the same !!
anyone got the top area dimmensions off the larger sti version ??

scoobydan1985

ok something ill be thinking about the wrx i have is a 2002 reg any ideas on how to bring the bhp without spending a fortune i am planning to spend a bit of money on it soon but wanna put it into a garage and do it all at once but just wanna play with it for now and maybe bring the bhp up a little without a remap so any ideas on little gadgets is much appreciated
cheers
dan

trevsjwood

iTrader: (2)

the benifits of the larger intercooler would still be there even with the smaller scoop/undertray, much the same as with the larger aftermarket intercoolers such as Hyperflow under the sti scoop undertray. Not fully but still worth doing.
Trev

scoobydan1985

cool ill defo be searching around for one then

trevsjwood

iTrader: (2)

02-05. core:-
sti- 19"x7"x3.5"
wrx- 16"x6.5"x2.5"

Hammer man

iTrader: (25)

and if anybody wants a sti newage one, ive got one. Drop me a pm if you want some pics...

BrownPantsRacing

iTrader: (6)

Running a wrx undertray on an sti scoop would be worse than sticking with the standard wrx intercooler and undertray. If the undertray can not feed air to all of the intercooler then you will get hot spots (heat soak) and worse/reduced performance.

I had a massive hyperflow intercooler with sti undertray on my wrx which is fine as the surface area was the same, the hyperflow was just thicker. But fitting an sti or hyperflow intercooler with a tiny wrx undertray is a bad idea. Besides the sti undertray has a fin and secondary duct to force air to more surface area.

For the sake of £50 and a fleabay sti undertray its well worth fitting.

I have pics somewhere showing the difference in size, will see if i can get some posted.

scoobydan1985

ok brilliant so would it benifit me more just to buy a wrx intercooler as theres one on ebay saying it can increase bhp upto 30bhp and it would save the hassle of putting an sti one on it ill have a look for the link on ebay and try n post it see what u think as im new to this subaru stuff and very gullable lol :-/

BrownPantsRacing

iTrader: (6)

Probably not. Some of the cheap eBay ones may flow worse than your standard wrx one. There are some really bad flowing cores in the cheap ones.

I'd still go sti, but get the undertray too or stick to standard wrx unless you doing turbo upgrade.

scoobydan1985

ill prob just stick to my normal one but get a recon one as mine just looks tacky like bent bits on it just looks ugly _ from earlier in the post i added what mods i had could any one estimate a what bhp its roughly running at on the prodrive sticker it says bhp increased to 275bhp but an estimate with other mods that have been added
cheers dan

scoobydan1985

sorry just looked at the sticker it was increased to 261bhp not 275 my bad

s70rjw

iTrader: (2)

The Newage WRX intercooler is fine upto 320bhp, some say 350.

trevsjwood

iTrader: (2)

we are talking about the 2litre and it would need the sti scoop to fit the undertray, so not just £50. I ran a VF34, AVO TMIC which is equal to an sti tmic, successfully for quite a while before eventually upgrading my wrx scoop/ undertray. I didn't find any noticable benifits either on the road or RR. But then I was around 320/330hp. Much more of an issue now at higher power.
The hyperflow is some 30% bigger than the sti tmic.
Trev

Midlife......

iTrader: (2)

I ran my bug WRX with an STI TMIC at 325 BHP (TD05 turbo and mods) with the WRX scoop and splitter.....the STi has better cooling and less pressure drop... despite what has been posted

......."bring the BHP up without a re-map" is difficult as the DENSO ECU just goes on it's merry way if you change anything LOL

Shaun

scoobydan1985

Ok cool so does anyone know where I can get a decent remap in Eseex and roughly how much or should I stick it on a dyno 1st