Can anyone tell me if an ST170 focus engine has floating little ends the same as the focus RS engine at all?
If so would a set of ST170 rods and Focus RS pistons go into my (low mileage 47903 miles)
silver top.
Alternatively, How long do you think a zetec with ST170 rods and pistons would last with a bit of boost (say about 20-25PSI.) through it? afterall the ST170 engine has forged pistons and very strong rods.

I'm sure someone has tried all of the above at some point so if you can help with any advice it would make me very happy.

 

170 pistons and rods are forged to an extent,and people have pushed 15psi 300hp from them over here,in the us they have seen 20psi and over 360hp,hope this helps

 

cheers jonny that's a great help mate.