Just want to confirm a few rumours regarding ST170 engines as there's a lot of info floating about that no one seems to be able to confirm.
I have just bought a ST170 engine for turbo charging so...

Do they have uprated valve springs?

Do they have stronger or steel rods?

Are they higher comp. ratio?

Are the blocks any dfferent to standard?

What exactly needs doing to stop the VVT?

Anything else worth knowing? Cheers