wrxmargy

Just a quick on I'm looking at buying a 2003 uk sti engine second hand to go in my 1998 UK turbo and the only reason I want a ej207 is because I've read there good for over 400bhp and come with forged pistons and crank ? Are they all forged ? I know for certain that the engine I'm looking at is a semi closed block and the engine code is ej207nw5cr
Thanks in advance

bustaMOVEs

iTrader: (31)

Yes all newage ej207 apart from Jdm twinscroll are true forged pistons and yes are good for 450

SmurfyBhoy

So much faulse info out there regarding this.

Research

Hypereutectic vs Forged

Pretty sure it was Bug JDM and a few others

plenty

iTrader: (13)

V7 (bug) JDM and UK pistons were forged.
V8 (non widetrack blob) pistons were forged on UK cars and hypereutectic on JDM cars.
All V9 (widetrack blob) and V10 (hawk) pistons are hypereutectic.

wrxmargy

Thanks guys some solid info there really helps

SmurfyBhoy

I had read that too and would really love it to be true because those are the two i have haha,

But i have tried to find out and get mixes of information from different reputable sources,

I would really like to hear from somebody who has stripped em all, if you have then great can you share a bit more, would be good to see the differences.

Or would be better if anyone happened to have both types lying around to show the differences,

"Supposedly" both types are good for 400+ on the 2.0 as its rods/bearings which most likely to go

ossett2k2

iTrader: (9)

Interesting thread.
There does seem to be a fair bit of stock about for the EJ207 short block at least 3 companies I know of who have what seems like plenty on the shelves and all similar prices at around £2k
It's one route I might take in the future if I don't go for a custom build.
Is there any way of knowing which of these blocks are forged or hypereutectic?
Like any numbers on the block etc? Can you tell from the piston crown or would you need to remove a piston to get the answer?

bustaMOVEs

iTrader: (31)

Correct mostly and better put, but all the 2.0 range of newage are forged as they are same part numbers, only the later Jdm are not as you put but are hyper...
Luke at icp confirmed this whole a few times.
I myself always thought it was the bugeye that was true forged from factory.

Fishbowlhead

iTrader: (1)

Is this just for sti's or would the bug wrx's have forged pistons as well?

wrxmargy

Cheers for all the replys guys, I'm gutted I sold my 03 bug sti now I didn't know but it was closed deck and everything Haha ! Now.ive got a bloody 1998 UK turbo

bustaMOVEs

iTrader: (31)

Its scd, not cdb.
And not wrx only sti

AS Performance

iTrader: (4)

plenty of 2003> JDM STi's suffer from ringland failure in the same way as the UK 2.5's do..........

we carry 2.0 STi short engines on the shelf as well as the later VAB "thick walled" variants

yabbadoo4

iTrader: (8)

bug sti has forged pistons, semi closed deck block, screw in rods, shimless valve lifters, sodium filled exhaust valves and hollow valve intakes and a load of other enhancements. it was said that the bug sti engine was over engineered and hence a very strong engine.

wrxmargy

What about v6 sti's I've also got the option to get an engine out of one of them and the seller claims it's factory forged, I just want to get as close to a reliable 400bhp in a smart low cost way

wrxmargy

Yea mate I read an article about it saying it was over engineered shortly after I sold it I was gutted ! And I meant semi closed before not closed

SmurfyBhoy

Something to do with diff blocks

S20 can be forged or hypereutectic

T20 can be forged or hypereutectic

W20 hypereutectic


I asked the same question of an engine builder i know

yabbadoo4

iTrader: (8)

im sure i read somewhere that it was the v6 sti block that was carried over and used in the bug sti but i dont know about the enhancements made to the bug engine ( shimless lifters, sodium filled valves etc) but should still be semi closed deck with forged pistons. hopefully some of the more knowledgable guys can jump in.

wrxmargy

Thanks mate can't decide which one to go for haha !

yabbadoo4

iTrader: (8)

cant really go wrong with an sti engine basically bud.

wrxmargy

Cheers pal , I just want to make sure I pick one that's internals can hack 400bhp

yabbadoo4

iTrader: (8)

an sti engine will take 400 bhp but a 5 speed gearbox wont! factor in a 6 speed conversion into your project as well, wont be cheap for the full set up, then you have to be able to stop properly with that amount of power so the brakes will need sorted too. at minimum you would want an sti brembo set up with decent pads or aftermarket set up like AP,s or K sport 6 pots etc.

Cambs_Stuart

iTrader: (3)

Other factor is the age. These newage engines all at least 10 years old, and it's hard to know how they have been treated/maintained before they go in without completely stripping and inspecting them.

wrxmargy

Thanks mate I'm getting some ksports , I was actually considering building the gear box and using 1-4 ppg gears but it would probably be cheaper just dropping a whole sti 6 speed set up in like you say , is there alot of wiring involved and I'll have to swap my diff won't I ?
What in your eyes would be the easiest option ?

AS Performance

iTrader: (4)

all later classic blocks incl. V6 STi are OPEN, new-age STi blocks are "semi closed deck"

yabbadoo4

iTrader: (8)

thanks Alyn, i hoped someone knowledgable would chirp in