Originally Posted by allaboutfords

As studabear says cant see it lasting long. I put a turbo on a 1.7 puma at 10psi with no mods went great turned it up to 12psi still went well until it went bang.
Air temp must be high with small intercooler and high comp. Also det would worry me seen many a melted piston.
I will stick with zetec head on st block just need someone who knows for sure what I would need to do to a silver top head or someone with a black top head for sale.