morpheus1870

Ok I'm in kind of a nice dilemma here and need some info from you guys. Previously I owned an 05 Sti ruuning approx 350bhp, loved it to bits. Also owned an 04 sti again running similar power. However I'm totally in love with the way the Hawkeye looks however I need to know the following:

1) How does the 2.5 engine compare the 2.0 in terms of performance out of the box, fuel economy and reliability?

2) Other than the engine what other improvements are there over the 05?

3) What has been the experience of those who have owned both cars?

I'm definitely in the market for a modified 06/07 which will be enthusiast owned and cared for like my other scoobies. I have been told that the torque on the 2.5 is phenomenal after a few juicy modifications. Would love to here of any experiences owning this version Sti.

Thanks all

daz1968

iTrader: (13)

I have never owned one as went jdm 2.0 myself, but from other posts on here 350bhp is easily achieved with exhaust, filter, panel filter and remap, some will state head gaskets and pistons are a problem, others will have had no problems. I would look for a jdm car tbh, but a lot of 2.5litre cars about with no blow ups so maybe it is in the minority. Just find a well looked afterone with either proper remapping or standard,

morpheus1870

Pistons and head gaskets, that doesn't sound too good, is this problem only confined to the uk cars?

j999jmp

I have a WRX 2.5 with PPP and have had no problems with the engine. I'm looking for a VF34 from the STI and then with a few other mods and a remap I should be in the 330 ball park.

Pramas

Its not as bad as you hear, pistons are good to around 360-370 , more is ofc possible but then how long it lasts is the next thing. Some go forever others go down the end of the street.
Ive got the 2.5 sti and love the torque, try driving a jdm and the 2.5 and see which you prefer ( although good luck try to find a jdm hawk )

morpheus1870

Tell me about it, not many around from what I can see. Think there is more choice for me sticking with a UK. There are some nice standard examples around. Just need to find a nice modded one that is within the limits of the engine. 350 is more than enough for me

s70rjw

iTrader: (2)

350 bhp can be comfortably achieved from a WRX without issue. Go JDM with the 2.0 litre if you want an STI

53

iTrader: (41)

Modified Euro import WRX actually

2.5's are great bags of power and torque on tap with very little modifications bar a decat and remap

This is mine, love it

https://www.scoobynet.com/subaru-444...ti-spec-d.html

morpheus1870

Wow, absolutely amazing car. The handling mods are . How would the car fair on bumpy rough yorskshire roads?

53

iTrader: (41)

I kept the prodrive springs for comfort and the ARB's are adjustable, it's stiff but never harsh

juggers

iTrader: (1)

Theres a JDM sti on pistonheads 15k

morpheus1870

Yeah little out of the price range looking at 12-13k tops.

Mrfastbaz

i had a 05 wrx 2 litre with the ppp putting out around 250 ish bhp found it to be very revvy now have a 57 plate sti type uk with the ppp pack 2.5 litre and it does nt rev as easy but has loads of torque floor it in 6th gear at anything over about 6o and watch it go.....up for sale at moment

matth76

I'll second that Simple exhaust, sports cat or decat and remap on a hawkeye STI will see you over 350bhp and 370 lbs.ft at least.

The hawkeye STI is a very good solid motor. Go for it if you get the opportunity.

Lovely car 53WRX. Love the leather interior

SineSTI

I don't know even one 2.5 here in Croatia without head gasket problem. Sun or later? So, take care with power.

DisoDisp

iTrader: (1)

Never had any engine related problems with my WRX thus far. Though its only at about 320hp/370ft-lbs atm, and has been for a few years.

Hopefully engine will be done in a month or two, looking for 450hp/480ft-lbs, possibly more.
And I'm confident it won't have any issues.

Then again, A mate has blown 8 (EIGHT) engines in 4 years.
That being said, he is in no way, shape or form kind to his car. Running in period of about 300 miles, before giving it the beans with 400+ bhp.

Luckyscoob

iTrader: (2)

I have an 06 STI with exhaust and remap to 340bhp/360lbs and has been spot on for the last 2 years. Pulls like a train and in pretty much any gear. I know of one STi that the pistons let go on but it wasnt remapped after an exhaust change

New_scooby_04

iTrader: (4)

From experience a 2.5 is a better engine for fast road use than the 2.0. Spools from lower down and more torque. Can be taken up to about 350/380 very easily and is great at that level. Properly mapped you won't have any problems.

Downside is that its extra capacity and low down pull make it feel less dramatic than a 2.0 litre and the std UK pistons are good for 1.3bar boost and no more - they're pretty fragile. If you want much more than the above figures, you really have to look at forged pistons at a minimum.

I got a 07 hawk, had the PPP work remapped by Bob and then took it to APi for a forged engine. Result 470/480 with 1 bar at 2700rpm ...... which is just gobsmacking as a day to day driver, but obviously costs!

DantheMan2605

What sort of costs? cry worthy or just hide from the missus?

I have a bone stock hawk sti at the mo and am looking at gaining 400-450 in the foreseeable future in the process of saving for a rebuild at the mo.

Looking at forged pistons, rods, pin, same old stuff really for the block. Then onto parallel rails, beefy turbo, fornt mount etc...

Im still learning so be gentle only got mine in may. First and possibly last scoob too

DantheMan2605

to answer the OP question...

Like the stories you hear EJ257 can prove weak when beyond its power capabilites it seems. It really depends on what you want. I for one am happy i bought a hawk (my fav model) the power even at 270bhp is phenominal still catches me out sometime when the lead runs to my right foot. God knows what 400bhp will be like lol.

side note: Can i claim whiplash from insurance company even though its self inflicted?

morpheus1870

how a bout 340 / 370 in a hawk wrx, anyone running such power through a rex engine

dunx

iTrader: (3)

Welcome back !

Sadly I know two people who killed WRX gearboxes running 350+ bhp/400ft.lb.

Budget for a swap to a six speed box, with a clutch, then a brake upgrade and it's obviously easier to buy an STI.

Sorry to bring a bad vibe to this positive thread, back down to earth with a bump...

dunx

P.S. One car is now at 487 bhp and the other was stripped to basic spec. and sold.

New_scooby_04

iTrader: (4)

If you're starting from stock and you want someone else to do the work for you, you're looking at a sum that breaks into five figures to do it reliably mate! The forged build is not the expensive bit, it's the supporting mods that are required to get to that figure that are equally if not more expensive.

They are awesome at this level though!