honeybadger

APIDavid

iTrader: (4)

If that is £2200.00 just for parts supply that is rather steep. If it is built and fitted including VAT - tell them l'll bring 5 cars down by early afternoon........

I think your plan works at the current time. Just run it on 99 RON to be safe.

Good Luck, David

honeybadger

you guys are very fortunate to have 99 RON available.

selhurstscooby

Just for parts!
Thanks for your advice & yes I will continue to run the caar on 99 RON

BTW running in? what would you suggest?

APIDavid

iTrader: (4)

We ask for 1000 miles at no more than 4000 rpm and moderate throttle opening and boost. ON OUR ENGINES

You need to get some energy / load into the pistons to get the rings to bed in. Pussyfooting around will polish the bores and it'll burn oil forever.

Make sure that ' they ' use a running in oil, ideally 10W40 or 15W40 mineral oil with as few additives in as possible.

David

APIDavid

iTrader: (4)

You got the good stuff, some of that local home made beer is high octane.........

honeybadger

yeah, the natives have some strong *** beer, but the hangover is then just as strong. i don't venture into it

APIDavid

iTrader: (4)

I was being careful - you might have been one of the ' natives '; how would l know ?

honeybadger

hahaha...no worries mate

tell me, can these 2.5 blocks take 2 bar of boost with out aftermarket strengthening?

APIDavid

iTrader: (4)

Not for long. They'll split the liners just from the pressure. So use Darton sleeves and you have a chance. They're just a ball ache to fit.

All that closed decking and pinning is unreliable [ flame suit on ] Especially the closed deck inserts. The problem as l see it, is the change in granularity of the metals used. The block casting and the inserts are two distinctly different types of alloy. Therefore they expand and contract at different rates.........

Pinning possibly helps stop the top of the block flapping and shifting the head gaskets. But once the pinning inserts are fitted they will have had an effect on the vertical trueness of the cylinders. Possibly also the circularity of the cylinders. So they'll need tru-ing up and if that involves boring it, the block is scrap for big power.

And pinning doesn't do anything about the weak thin cylinder walls. And anything other than Darton type liners seems to move around too.

That's how we at APi see it. Others have different opinions and different levels of success.

David

honeybadger

ye ok. thanks for the enlightening answer.

Subaru_Freak

Just to chime in as a US 11' STI owner. We are having the same ringland failure issues with the GR chassis Subarus. Here's what we have found out:

1) The stock tune is ****, the switchover from O2 monitoring is too late and occurs during the boost threashold causing knock / det. Those with aftermarket tunes seem to fair somewhat better, but still have issues.

2) There is a lot of oil contamination in the intake. This can cause intermittent knock / det due to lowered octane. It's common for people to install complex Air / Oil Separators to avoid this in the PCV system. No concrete evidence on this, but can't hurt.

3) My hypothesis is that the Subaru knock control and a fuel pressure resonance issue are causing the problem. At 2800 - 3000 RPM the OEM fuel system will run into a harmonic that fluctuates injector duty. The problem is that the system is reactive, meaning the det happens and it tries to fix it. Especially in 5th and 6th gear where load is sufficient to create substantial boost (1 ATM+) around that RPM. Tuners, you'll notice that the A/F correction tables will constantly hunt in the load / rev ranges represented by this harmonic. If you install a 1m fuel injection hose aft of the damper it tends to resolve this harmonic by shifting it further up where it's less of a problem.

Subaru is pulling ECU data here and turning down anyone with any mods, or even ROM history (counter) of mods. A lot of failures, a lot of hatred of Subaru's response.

Signed,
The Colonies

honeybadger

urban

iTrader: (1)

Same in the UK, even the MD appeared on youtube, firmly pointing the finger of blame at bad owners and their driving style, or modifications.

See the statement they released, interestingly though, they seem to have dropped it from their site.

https://www.scoobynet.com/scoobynet-...subaru-uk.html

I'd say they've burnt their bridges this time with the customers.

honeybadger

^ i agree, urban.

P1Fanatic

Well I am certainly one who was put off from buying a 2011 WRX STi due to this debacle and went to another marque. Too much of a gamble when spending that kind of money.

urban

iTrader: (1)

I think this will apply to most people.

Subaru_Freak

The vast majority of people that are bringing in OEM cars with ringland issues are having no problems getting short / long blocks replaced at zero cost.

Honestly, modding the mapping kinda absolves Subaru and is a risk. I knew that, but it didn't stop me from doing it at mile 24. Mine has over 40,000 miles on it and has never seen less than 18 PSI yet has had zero engine trouble. For us, it seems the 08 year model had the most failures, but that 09 and 10 saw moderate amounts. Overall the # of failures is very small in a % of ownership.

I am interested to see how your slightly higher fuel grade affects the failure rate. Our country runs on 91 - 93 (R+M/2) which is effectively 96 - 98 RON fuel, which is a tick under what's available in some countries at most Shell stations.

urban

iTrader: (1)

UK cars have a sticker on the inside of the fuel flap stating the minimum fuel grade is 98RON.
Do the US cars have anything like this?

Subaru_Freak

Yes, it says Premium Fuel Only which is 91 - 93 US Octane (96 - 98 Oct).

Our market is large enough to get it's own ECU mapping, mostly due to our emissions standards. So I'm sure our mapping is less aggressive. Happen to know what a stock UK 2.5L STI will dyno on a Mustang?

urban

iTrader: (1)

Official figure for the stock 2.5 is 300PS
The car we have is the Euro car.

Don Clark

300PS (296BHP) at the flywheel...........

mickp

iTrader: (1)

A definite + 1 from me

Piston Rings

Just after reading the engineering-technical-statement-subaru-uk from 2010. Its a pity they didnt publish this inside the STI brochure instead of the section called [ invigorating power ] which last few lines stated [ this is an engine that trives on performance ] As many owners found out the performance didnt last long before the engine said enough is enough and subaru-uk has lost its good name as a result of the trauma they put their loyal customers through with this engine problem and the way they blamed the customers and did everything to avoid fixing many of these STI models within the warranty..... It is like something that would have happened in British Leyland in the 70s but at least they tried to sort out their customers and not blame them on how a car worth around £30k could self destruct its engine without any modifications from standard.

urban

iTrader: (1)

They should have done the decent thing with the customers instead of issuing that idiotic statement.

chopperman

The uk is a small market for Subaru so i suppose they think its not a great loss to loose this market. Trouble is with the age of the internet the bad word will travel fast to other larger markets. When modding cars the advice given here is "do it right, do it once". Pity subaru didn't do this. The 2.5 can be a great engine when the right parts are used. Many tuners have proved this. As others have stated, its not so much the failure's that have turned people away. Its the denial and lack of responsibility by IM that has turned people away.

urban

iTrader: (1)

selhurstscooby

x2

AS Performance

iTrader: (4)

from a different view

we see far better results in 2.5 block integrity and "trueness" from machining & fitting CDB inserts over any previous results with pinning (and even with pinning it improved the blocks 100%+) - BUT we have modified and improved the way we carry out the installation of the inserts over the last 2yrs+ and are also very particular about the material used / as with any "custom" modification not everything that looks similiar is the same!!! and there is only one source for this specification now............

we have plenty of satisfied high power customers to boot and have also proved the effectiveness in various other engines/marques including a certain 'mildly tuned' EG33 motor that seems to hold up OK

Alan Jeffery

That's our opinion as well. For big power we just use the stroked EJ22.