As above really, has anyone ever done this?

My engine ist kaput and I've had an offer from one company who'll re-build my engine and and while they're at it bore it out to a 2.5.

I've encountered engines that have been bored out a little to say 2.2 or 2.3 but 2.5 seems like an awful lot to be asking of a standard bottom end.

Anyone ever experienced a boring of this size (snigger)?

 

Subaru themselves do a bored out 2.5 version of the 2 litre
Does this company who can also do it have experience of Subaru engines

 

The weakness of the Subaru 2.5l vs the 2.0l might suggest that it's bored out too much, leaving the walls weak. I guess there's a good reason people stick to 2.2 or 2.3

 

Maybe there is a slight misunderstanding between you and the guy repairing the car.
Maybe they mean that for the same amount of money (or just a bit more) they can buy a 2.5 shortblock, instead of the 2.0 shortblock.

What are your ultimate goals,as both standard blocks are not anywhere near bulletproof, with the 2.5 being more damageprone at higer boost levels compared to the stock 2.0
However, at lower boost pressures the 2.5 is more torquey.

If your block can be bored and honed I would rather spend the money on uprated internals for your own block (pistons, rods, rodbolts to begin with)

If your own cilinderblock is to damaged for repair it all comes down to your own wishes and goals as to wether you want/need a 2.0 or a 2.5 shortblock.
However I would read some more/ask questions, as now it seems the right time to upgrade, whatever the block (2.0 or 2.5)you choose.Better rods/pistons etc are not much more money then the stock stuff (which is not overly reliable IMHO),it is usually the assembly and engine removal costs that make it more pricey.