Hi all nice to be back and got the bug again, so I've owned her for 3 years and currently just running de cat and map tweek and it's fine but not enough compared to my old 04 sti,
Spoke to Neil at slowboy who has done all work on old and new. I'm aiming for 380-400ish, I'm unsure on doing the pistons dreading the Ringland failure issue tho if keeping to circa 400 do I have to?
So I'm thinking

Injectors
Caik
Gaskets and studs
Turbo probably as vf 48 is good to about 370???
( any suggestions on this.... Md321t??)
Any of you guys got similar or can suggest another route, and no I'm not selling it and buying a 2.0!!

 

At that power level your car probably wouldnt survive the mapping process, get it built from the ground up if your chasing power. The engine can fail at standard power levels. Neil @ slowboy should know all this.

 

So your saying it needs forged internals regardless

 

Thanks for that!!! If I wanted one of those cars I'd of brought one tho. Not sure you have understood me.

 

Stick with the subaru mate, loads more character and much better looking than the fleet of golf r/audi/merc hot hatches that flood our roads. At least with the subaru you can tell where it is when you walk out the supermarket.............imagine looking for a golf r parked inbetween a few normal golfs........yawn!!!

The Subaru looks like it's doing 100mph when its stood still.
A golf r looks like a golf 1.6 gl regardless of whether its moving or not.

Get the engine built right with the closed deck inserts and your good for 500bhp

 

Thanks mate more of the sort of answer I was looking for!! Rough costs?
Would running what I said previous be OK if I add forged pistons being that's the weak point or is there more to it?

 

You may be able to push the current turbo to 370-380 so that will give you what you want with good spool.
A Scoobyclinic SC 38 turbo would be another option.
Running higher boost to reach these levels will obviously put your standard block at risk but it may be ok if you don’t abuse it and change with quality fluids every 3-5 k.
Personally I would go for it then forge if you need to.

plenty of options here http://tdracing.co.uk/project/tdr-forged-short-engines/

Good to see another new shape owner looking to stick with the Subaru brand.
Had mine coming up to a year now and I’ve only seen 3 or 4 on uk roads In that time.

Siv

 

Excellent.... go and post on ladanet then

 

Basically exactly what Neil said mate and I'm sure he knows what he's talking about being he does it for a living. He said it should be OK for 400 or under definite forge for above which starts at 5-6k,!!, he said do the injectors, caik, gaskets and studs re map and stay around 390 with sensible boost and if it goes bang then do the rest. Also says he's had some with issues at 30,000 miles and some are still good at 100,000 +, I trust him he had my old 04 Sti at 400 and it had done 130,000 miles and used as it should be with no issues at all. I don't intend tracking it just the occasional fast road, it's 3 years old and has only done 18,000 miles.

 

Surely rare is better if its done right??? How many bugatti veyrons have you seen? Lol

 

Will look into it! Will forging help much really or does the block need closing? Without sounding a tit what does the 2.35 entail? Is it basically fitting another thicker sleeve and then different pistons?

 

Your right mate, they are a **** car that nobody wants


Spend a few quid on it though and you can turn your “lada” into something a lot more exclusive than your run of the mill A45, RS3 or Golf R.

Plenty of sheep out there to follow

 

Ok that’s great, thank you David.

Siv

 

Fast forward to 5.00 minutes.

Oh dear

 

Enough said!! Anyway back to topic!! Lol

 

If your going to forge it then for an extra £500 it’s a no brainier to close the deck.
IMO you would have a reliable 400 bhp / 400 lbs car dependant on your supporting modifications.
Would make for a fantastic road car.

The 2.35 is a stroker kit and probably overkill for your power goals.

Siv

 

https://www.advancedautomotives.co.u...791-8918-p.asp


https://www.scoobynet.com/general-te...of-2-35-a.html

Hth

Siv

 

David can I ask why your on a subaru forum when you seem to have an utter dislike for the brand??

 

Dont even go there, he pops up now and again with a different username to wind people up. Shame really as he is actually quite knowledgeable regarding impreza's. Must be a sad life when your only means of entertainment is to pop on scoobynet to get a few backs up.

He will probably end up being a serial killer or something.............

Just dont react too much and I'm sure he will get bored until the next time.

 

Trouble is around the 390-400 marker one dodgy batch of fuel will kill that engine off. Been there done that got the t shirt I was only sat at 380bhp at the time, It blew the Ringland's out and did the head gaskets in at the same time at less than 20k on standard stock internals. Engine was better suited to being forged and the liners fitted with a CDB insert or pins to try and stop the tops of the bore splitting. It survived at 460-500 bhp for 50,000 miles before I sold it.

If I were to do it all over again it would be running straight to forged, Less inconvenience, less costs of breaking the engine open for the sakes of studs and gaskets to run 400.

 

Then you will also know that a forged 2.5 is actually a very good engine.

 

Thankyou very much, most helpful mate, can the liners be done by most reputable tuners or only a handful of people, I'm guessing there machined to exact engines rather than a generic kit?
Also is it just the pistons that need forging or rods and crank?
460-500!! On the crappy 2.5! 😉Lol

 

Alyn @ as performance is the go to man for this, I believe most tuners use him aswell. My last impreza was a blob sti running a built 2.5 and a gt3071r turbo with 434bhp and around 460ftlbs.......it made a truly fantastic road car with hardly any lag and torque by the bucket full.

 

Blew it up???

Not sure you have the correct person/car/information there buddy

 

Loss of compression, it wasnt a decked block and had been hammered on track for years before I bought it.

 

Yes correct same as plenty of other hard used 2.0 engines failed. The engine actually still ran quite well and ended up overseas as a stop gap engine. Didnt use any oil which was strange. My 2.0 sti engine failed @ 355 bhp with 60k on the clock-and some people say they are the best subaru engine ever built.....go figure.

I took a chance with that blob, it only cost me 7k and I sold it for nearly 6.5k after a year and half.

 

My new shape STI went bang on the standard engine at 400bhp. As above, my advice if you want more than 350bhp is to forge it.

 

The one that failed was a new crate sti short block supplied and mapped by power station , I replaced it with a used sti long engine from matty b and that was spot on. I agree the 2.5 engine is **** in std form regardless of how much power you put through it and anyone that thinks theirs will not fail needs their head looking at. Was there ever any success in court over here with the failures?

 

The only thing I can see that has “Failed” is Scoobynet.

Its a shame people want to come on here and spoil it for the genuine enthusiasts who just want to share a passion for a particular make of car.

I don’t understand what motivates these people, maybe I just don’t want to know.

I for one couldn’t give a flying **** if my engines fails.

Siv

 

So sensible hat on,

Forge pistons
Forged rods?
Does the crank need replacing?
Inserts / cdb or pinned?
Injectors
Caik
Arp or alike studs and gasket
Re map existing map and wait til more monies and replace turbo when engine is ready to take it?

Sound a plan?