GRIFF007

Anybody published sensible priced power upgrades for new UK 2.5 - eg Prodrive, TSL?

I understand 400/400 should be possible for less than +£3k

Any takers?

ukdave

shd be visiting rcms with me mate sometime this month to get an exhaust sorted and discuss "power options" http://photobucket.com/albums/v365/s...%202006%20sti/ mates sti.

Tim W

iTrader: (1)

It's a bit new, but people like Xtreme Scoobies, Powerstation and Scoobyclinic should be able to come up with some nice improvements for the car, as they all have lots of experience with fitting EJ257, 2.5 engines like the one fitted in the MY06, to other Impreza models in a wild range of states of tune, especially Scoobyclinic and Powerstation who assemble the Litchfield Type 25.

specialx

We have lots of tested mods already in plan for the 2.5, the 06 upgrades will be listed on the website very soon.


Ads

gazza.s

is that a uk car or jdm?

does the uk car get the glow dials now?

highlander68k

I would be suprised if anyone would be offering a 'reliable' 400/400 from the 2.5 engine.

From the reports that experienced tuners have given me, 400 is not on the cards without changing the rods and pistons for forged items.

Even changing the exhaust to 3" tube has been causing major headaches.

However, we will have to see what develops over the next 12 months.

Bob Rawle

Be wary of anyone claiming they can do this easily, the engine is just the same short block as the EJ257, and that's been shown to need particular attention when tuning.

Also the std turbo won't support 400 bhp.

The same rules apply though, exhaust, induction injectors and remap will yield good gains at substabtially less than the quoted figure and decent "safe" results can be obtained if the right attention is paid.

bob

GRIFF007

Hi Bob

Having had the 04 type UK STi PPP and looking for considerably more torque over wider range with minimal lag and expense - what would you suggest - quite happy with 2 litre if it is better bet - but not into throwing thousands at a 4 pot - driven WRC 350 uk and 360 JDM and want more - probably fit T25 style suspension set up to keep it on tut road

Tim W

iTrader: (1)

I forgot some names to add to that list of tuners with relevent experience who could probably offer a complete package Zen Performance, Andy Forrest Performance, BRD...oh and Lateral Performance for some serious advice and cracking turbo/injector/exhaust/intercooler etc options (but no mapping, although Mark knows a man who can )

Jay m A

iTrader: (2)

I was rather hoping an OE EJ257 and v3 STI heads will give a reliable 400 of each with supporting mods. Thats the plan anyway

Andy.F

Some of the results the guys in the USA have with std internals 2.5's

http://forums.nasioc.com/forums/showthread.php?t=905804 446whp
http://forums.nasioc.com/forums/showthread.php?t=862170 422whp
http://forums.nasioc.com/forums/showthread.php?t=902268 531whp
http://forums.nasioc.com/forums/showthread.php?t=831998 564whp

Remember these are wheel horsepower figures !

Don't listen to the scaremongers ! Anyone remember back to the days when they said any more than 350bhp on a std 2.0 would bend rods

Andy

Bob Rawle

Andy thats a bit misleading as a statement, you know very well how sensitive the EJ257 2.5 short blocks have been to over cooking. Bearing in mind these are customers who don't strip and rebuild twice a year like some Scottish residents (yes JB with all respect I was thinking of you here as a case in point).

Lots of quotes in the European BBS's about big power 2.5's and lots of sad (as in unhappy) individuals with broken ones around as well although not so well pubicised.

Scaremongering, defined as the art of spreading frightening reports or rumours. Don't think that description fits the facts but what the heck.

Personaly I would like to see some of the big power USA cars over here in our environment and see how they measure up, no doubt that good results are achieved but prefer to see it in the flesh. Interesting that the quoted links relate to non std turbo's and non std fuel strategy's including methanol(ethonal) injection and race fuel, certainly my own water/methanol mix made a huge difference.

My point is simple, with the right care and attention then the cars can become what most would like, broad band torquey tractible engines but don't expect them to hold together if you push beyond the limits and don't expect them to last too long when you do.

cheers

bob

john banks

No problem Bob The last one lasted a year and about 15000 miles without being opened, half with the P450 and half with the GT30R and the pistons survived this time (last time I cracked a ring land with 1.7 bar, top speed run, methanol, a lot of timing and I think a single hard detonation). It was probably never below 450 BHP tune and always did at least one 121mph quarter mile pass at the drag days it went to on Goodyear F1s with six speed gearbox. It was underspecced for what I put it through, but where was I to go after three 2.3s failed when I didn't want another 2.0? It was fun and frustrating finding out what it could do. We still don't know if there was something unique to my car that made it do headgaskets, or whether it is a weakness of my P1 heads with an EJ257 with the clamping methods used, or whether I just pushed it too hard for a thin walled semi closed deck block with the cylinder pressures that I had on Optimax with additives rather than race fuel. Clearly most owners won't put up with this level of "reliability", but I had some cheap fun that I now really miss from M3 land.

I want to play with another Scooby engine in a car that is not a daily driver, but I don't want to do it with an EJ257 unless it is sleeved, and even that is experimental I think. Crawford 2.3 (from EJ22 CDB donor) would be an obvious choice, but N/A now.

OTOH, my experiences should not suggest that using a factory EJ257 car with its proper heads will necessarily have headgasket problems. I would be surprised if there are a lot of piston, rod, crank or bearing issues at 400/400 though with the right tuning. I never left it at that for 10s of thousands of miles to find out though and was always greedy/pushing the limits.

Andy.F

Of course they do !! Never for a second would anyone expect this sort of power from the std turbo !

The issue JB had with his car could quite clearly (in my opinion) be blamed on pushing a smallish turbo too far for that particular engine.
When he fitted a larger turbo then the power increased to well over 400bhp on the std internals. The std short engine was 100% reliable in this spec.
The headgaskets were still an issue for him but that is not something that affects the factory built 2.5's.
I have a number of customers reliably running circa 400bhp on 2.5's, some for over 18 months now, this has included track use.
John will be the first to admit, he was pushing the limits. This is something he (and I) willingly do on our own engines but not customers units.


I agree thats the key, don't push beyond the limits. This applies to any engine, not just the 2.5.
My point is also simple, I consider that the limits on a factory built engine, when correctly tuned, are somewhat higher than 400bhp.
Time will tell, I have one on order.

They are learning in the states how to tune these engines properly now, this is reflected in the excellent results they are achieving. Turbo selection is a critical factor in this if a safe, wide and useable power band is to be retained.

Andy

DannyBoyTurbo

Just like to raise this up again now they've had time to put thier packages together.

In this months Jap Performance GGR are claiming 370/370 with just a turbo back sports cat zorst, cone filter, pump and EcuTek. Despite the rather limited mechanical mods its a staggering £2300 though so anyone else offering similar claims?

hades

Those GGR claims aren't all that dissimilar to the T25 package, especially when you consider that the T25 was figured at Powerstation, which has traditionally been one of the more conservative rollers about. Admittedly, the T25 engine has a few other mods than the GGR.

IMHO, worth speaking to powerstation as the T25 is clearly a tried, tested and apparently reliable package with a good spread of power/torque, albeit less than 400/400.

GRIFF007

to quote the little fella on 'Overhaulin' -- 'I think your rippin me off..!'

We are certainly being charged far too much for this 4 cylinder tuning in the UK

A Chevy V8 same power - complete new build - same money....!

Beastie

iTrader: (2)

GGR also did a 2.5 conversion with 500BHP in a previous issue.