ado

iTrader: (4)

What version is MY53 WRX STI and does it have forged pistons from factory?
Cheers peeps!!

Paulo P

iTrader: (42)

It'll be a version 8 and should be a blob eye and they do have forged pistons from the factory.

jayallen

iTrader: (31)

From what i have read V8-on had HyperEutetic pistons not forged.

alcazar

iTrader: (2)

That's what I thought too.....

ado

iTrader: (4)

Cheers chaps.
If the pistons R the hyperEutetic ones, do they suffer from the ring land breaking like in the 2.5?
Cheers

MattyB1983

iTrader: (51)

Piston are not forged but ARE just as good mate.
And no, do not suffer same issues as 2.5.

Newage STI engines (2.0) are very strong. Seen one on here making 500 with no issues and many run 450 through standard internals. I'm somewhere between 400 and 450 with my STI 9 block and all is well (runs off and touchs nearest wooden object, lol).

Paulo P

iTrader: (42)

Never heard of that and I've learned something new

joz8968

iTrader: (13)

Tony Burns will be over all this thread soon....

dj219957

its just the 2.5 sti which has the ring issues.

jayallen

iTrader: (31)

Paulo, from what ive read the pistons run zero bore clearance because the block expands at the same rate as the pistons.

Paulo P

iTrader: (42)

That could explain why they are quiet from cold unlike the early forged motors I've heard I have a 2005 sti short motor in mine and it's dead silent even from cold and I wondered why.