s1wrx

iTrader: (1)

hi people,
i blew my bigends on xmas day. does any1 no were i can get 2.5 bottom end from?? any advise wopuld be great.
thanks darren

alcazar

iTrader: (2)

Try e-bay, and also trawl round a few tuners on here, they have them in stock sometimes.

However: DO NOT be fooled into thinking that a 2.5 short motor will cure all your ills etc.

I have it on very good authority that the 2.5 engine will pick up a piston if used as delivered, it needs bearings and forged pistons at least, to be reliable, so budget for those in any costs.

Mus

iTrader: (2)

I got my supplied and fitted by engine tuner no problems At all. Give martyn and Alan a shout

good luck mate

s1wrx

iTrader: (1)

thanks for that mate, thats the kind of advice i was looking for, need reliability over everything else. any1 have any suggestions on which route to take?
thanks again

mattpat

iTrader: (1)

hi mate

can you expand a little on this as i was also looking at a 2.5 short motor after a head gasket failure and haven't heard this before
if forged pistons are recommended then it is may not be the best option or as cost effective as i thought initially

cheers
matt

alcazar

iTrader: (2)

OK, just that the OE pistons are VERY close clearances, and have been known to cause problems at higher powers, seizing a ring or splitting a ring land.
Also, the bearings on the OE engine are pretty basic, to say the least.

Find a 2.5 short engine and have it modded, then you are OK.

dazdavies

iTrader: (22)

Alcazar, sorry mate but that's utter rubbish!!

I put a bog stock EJ257 short motor in my car along with a rotated garrett GT30R. It went on to do 10K miles at 452bhp without any hint of trouble. When I took it out again to sell it was in fantastic condition. It's still going strong 2 years later at circa 400bhp.

There's also plenty of standard blocks doing exactly the same.

This isn't something I've heard on "good authority" this is something I've experienced myself first hand.

Not meaning to get on your back its just that my actual experience completely contradicts the statement you've made.

alcazar

iTrader: (2)

Can't comment on your luck as I'm just going on what I've been told by two VERY respected Subaru tuners

If the 2.5 is so good, why are Subaru/IM themselves now refusing to warranty even a new one when fitted to a 2 litre car?

And why are you going the forged route?

dazdavies

iTrader: (22)

Nothing to do with luck, look at one of the GRD tuned cars. Just bolt on mods (standard rods and pistons) and that's been going for 2 years + at well over 500bhp.

There's plenty of standard EJ257 based cars about quite happy at 400.

The reason I am going forged is simple, I'm going for 600bhp+

I would recommend a standard 2.5 block all day long to run @ circa 400bhp.

Obviously upgrading the pistons is a good idea but to say it will definately fail if you don't is complete rubbish.

a16pse

Its more than likely because he is running between 5oo and 600 bhp its funny this because duncan from dynamix ran his standard 2.5 at 380 bhp for loads of track days and a few ring trips without any issues, it may be the look of the draw or how their maintained , i have done loads of track days in my 06 STI only running 340 and 386 torques and never had a problem, i think me and DAZDAVIS should start a 2.5 reliability thread, lol.

alcazar

iTrader: (2)

Ah........but I didn't, did I?

Just said if you want to build in reliability, budget for forged pistons and better bearings.

Never mind YOUR luck Daz, knowing MINE, MY car would be one that DID fail if I didn't take precautions

alcazar

iTrader: (2)

BTW, Daz, you got any 740cc injectors you might want rid of?

dynamix

iTrader: (3)

A std 2.5 will be perfect for 400/400 all day long if mapped sympathically to the intended purpose and maintained well.

Don't believe the horror stories.

If you have the other elements in place then you can get fantastic power from the 2.5 bottom end and like all scooby engines there will eventually be a weak link.

400/400 is very cost effective on the 2.5 - much above that and it is entering a world of never-ending costs...

a16pse

ahh, a voice from one of the mapping gods, as said duncan knows a thing or two about the 2.5 and what its capleable of i have spoke to him on the phone regarding reliability and he has more than put my mind at rest so cheers for that duncan, steve.

dunx

iTrader: (3)

But hatch STI's WERE dying in std. form ?

I'd like a 2.5, but a 2.1 will do for me ?

dunx

dynamix

iTrader: (3)

Yes - the std subaru map on them was proven faulty and they did a recall and reflashed them all with a different map.

a16pse

See duncs got the right answer for everything, LOL

Anger

iTrader: (4)

The GRD car is a 2.0 Daz

a16pse

whats GRD

Anger

iTrader: (4)

:: GRD - Greenwood Racing Developments ::

s1wrx

iTrader: (1)

can any1 reccomend a tuner/company to use?? subaru's are new to me. ford rs is all i no about.
cheers darren

dazdavies

iTrader: (22)

It's not often that I am right but I am wrong again