ChristianR

iTrader: (1)

I am thinking of spending a lot of money on my subaru impreza to get well over 450bhp, with a lot of torque also.

Please can you come back with what INTERNALS I will need to hold this much power, without my scooby blowing up .

steve McCulloch

I'd wait a while and see what happens on the 2.5 litre engine front

As far as 450bhp goes forget it at the moment

Apart from:

Crank
Conrods
Pistons
Head Gaskets
Clutch
Gearbox
Diff
Injectors
Bigger hybrid turbo with loads of lag!
Water injection
Fuel rails
Fuel pump
and more..................

Its very difficult to get over 400hp at the moment on the 2litre engine

But I'm sure Adam M will have a few words to say?

You may have heard about an RC Developments car with 400 bhp at 1.3 bar - forget about this - they are in a dream world

Adam M

I actually suggested christin asked this publically as I told him not to bother attempting big power without a closed deck block and wanted to see if others agreed with me.

Run 2.0 bar in a 2.0 litre, properly mapped and I am sure 400bhp is more thana possibility.

ChristianR

iTrader: (1)

christin? Er... last timed I checked I was a Christi<B>a</B>n!

So does anyone agree with going the closed deck route, with a 2.2 stroker kit? un-equal manifold....

steve McCulloch

Theres no-one in the uk I could trust to do it?! - or rather no-one I know who's had praise

Who you gonna use????

Why dyou want an unequal manifold?

why a 2.2 litre stroker kit? - thought CraigH went down that route with bpm - with very poor results!

Like I said theres been a few comments floating around about a 2.5 litre conversion - perhaps CraigH can comment on this - somemone out there must know a bit on this one

Dont ask Firefox though - he does'nt even know which way round pistons are supposed to be

You must have 10's of thousands to spend. I wish I was a millionaire.......

ChristianR

iTrader: (1)

I wish I was too... alas I am not, just working hard and spending my hard earned cash

Unfortunality, my girlfriend and my mum don't like how much I am spending.. but oh well, you only live once!

Danny Fisher

Steve, I think Craigh had issues trying the 2.2 stroker kit. MAybe he could post more details.

Dan

Toerag

Read

Mike Tuckwood

Send me your car, at least 6 blank cheques, leave it with me for 6 -8 months and I'll sort that out for you.

ChristianR

iTrader: (1)

a tempting offer, but I would like to know more peoples views first!

ric

I am staying in Australia at the moment. Bought a car magazine and they are advertising a 2.5l stoker kit. So there is one available. I think you should contact Tony Rigoli Performance.

greetings
ric

Adam M

There is no way I would ever consider a 2.5 stroker kit. Fist of all, It sounds almost impossible to me, as the piston would have to be really short to miss the crank the engine would sound mechanically terrible.

Further to this, there are loads of engine design theory books which give a maximum recommended piston speed. With a 2.5 stroker this would be massively exceeded. Rather you than me.

I think craig had issues with BPMs stroker kit, it doesnt make them all bad.

I reckon christian mentioned unequal length headers because they give a flatter torque curve and retain the warble noise of a boxer. The torque curve makes them better suited for road use rather than all out riding of torque peaks on the drag strip, and the noise makes the car easier to live with.

I dont reckon 2.5 conversion is a good idea. If 2.5 is the route then start with a 2.5 block from a legacy of impreza rs. Bear in mind these were built to be 166bhp normally aspirated engines with a compression of 10:1. They are also open decked so you face issues again with trying to extract serious horsepower.

I think the best route is to locate an ej22 closed deck block, known as an ej22T in the states and stroke that for I think 2.33 litres. This is going to be difficult to find and expensive to ship over etc.

Try a reputable stroker kit on a regular closed deck 2.0 such as the jun kit, or write to another japanese tuning company and ask them how to get their kits in the uk.

Find a good engine builder then bobs your uncle.

I still think if auto sportif were good enough for Nicky Grist's 22B they are good enough for you. They also love the stroker kit.

Finally though, it is much easier to just uprate your own internals and hike up the boost. Ask Craig H!


Most importantly, thewhole point of you posting was to hear from people who arent me. i should think Bob Rawle and Firefox (regardless of piston orientation )
are people you should certainly seek some advice from.

Toerag

Oops double post that I'm not allowed to delete!

[This message has been edited by Toerag (edited 04 October 2001).]

Sam Elassar

hi there
a 2.5 crank in a 2.2l block will give you 2.3l i think.

are not the legacy block a 2.2l could you get them closed deck ? i thought the older legacies had closed decks anyway.


has any one on this board ever seen a twisted block ?

R19KET

Sam,

I believe the main problem with high powered engines, that use an open deck block, is that the bores can move. I suspect this may have been the cause of my head gasket blowing.

Mark.

Sam Elassar

hi mark
what do you mean by bore movements ? are you saying the the bores moved further apart from each other or something? as in the deck lost shape a little bit. very technical terms i am using.

is that what you found after measuring the bores ?


sam

stick

submannz, I'd be interested in the specifics. At the moment I'm getting 350HP (flywheel). The car is a '95 STi with FMIC, intake, exhaust, stock TD-05 and a Motec. From what I understand my block is open deck. What I'm looking at next is a stroker kit and was looking at the BPM 2.2L kit.

Now, what are peoples experiences here. From this thread I understand that someone has possibly not had a good run with this kit.

ChristianR

iTrader: (1)

you have email..

submannz

What you really need is a closed deck block, which are mainly found in the Very early N/A and turbo legacy's, 2.5L Subaru outback heads (solid lifter, large bucket) and get the inlet ported to match the EJ20T port sizes. Use the turbo cams and increased to 230deg. duration @ 0.050. Get a 2.2L forged stroker kit, remove the bores and get the aluminium coated with a special coating. If you don't do this you will keep cracking the bores. O-ring, spigit and strap the block. Hybrid turbo...

And then you have 450 reliable HP, and running between 22 and 27PSI boost.

Your problem now is the gearbox, I have just blown my one up and have just re-built it. Had everything crack tested and shot peened, if I blow this one my only option is a dog box

submannz

2.5l stroker kits for EJ20? I find that hard to believe, there are lots of people talking about it, but will be too difficult (too much money and ******** around). I am sure you will find that they are talking about 2.5l stroker kits for the EJ22.

R19KET, you are right but also, with the open deck blocks the bores move and end up collapsing in on them selves, and make a very large mess, screw all you hard work and loads of money spent.

submannz

ChristianR if you are really serious I can give you finer details on what I have explained above.

And by the way I know of an 800Hp EJ20 motor (dyno at the wheels) not in a Subaru and running only rear wheel drive.

Sorry had to break it up to a number of replies because the site couldn't cope.

[This message has been edited by submannz (edited 08 October 2001).]

Sith

I may be missing the point here, but if I were to spend that sort of money, I would trundle out, buy a TVR Cerbera 4.5, 100 in what was it 8.5secs. I know it RWD and entertaing in the wet. Surely a Scoob with 450 will become interesting to drive in the wet. If Danny can get all 4 wheels smoking in the dry now, in the wet the mind boggles.

If you go ahead, good luck. Have you thought of the fuel bills. I have been ragging my almost standard UK and managed on 5 miles to a litre and I'm sure I could reduce that.

As I say good luck.

P.

submannz

Stick, give me your e-mail address and I can post to you the mods, saves filling this forum up. You are well on the way by the looks of it, very similar basic setup to myself.

By the way you can get the water galleries on the open decks modified, alloy weld blocks into the water galleries to make a sort of closed deck block.

Have a look on my web site and you will see.

steve McCulloch

5 miles to a litre - wish I could get anywhere near that!

If people are spending so much money I think fuel bills is the last on the agenda - who cares!

I wish I lived nr the expert tuners in Aus - seems where still back in Prehistoric times here in the UK.........

CraigH

Stick,

Mail me offline re the BPM Stroker......

Sith

Steve,

True, true. I was over the moon I could get 5 to a litre as it's the only reason I got to a Petrol station. Never driven so lighlty on the throttle.
Shudder to think what you're getting

Live long and prosper, !.!

P.

light12

hi all.
have a look

light12il

hi all.
take a look.

Sam Elassar

hi subman
can you send me the finer details and the specs for the your engine, stuff like clearances etc...

cheers

sam

FASTER MIKE!!

what sort of money are you talking about and for which conversion. looks very impressive!!