Slap a blower on your Puma motor. The 1.7 was originally intended to be turbocharged before Ford dropped the idea for cost reasons, and they can handle the power. It's also a lighter motor, reviver, less lumpen and nicer feeling than the 170 unit. Indeed, it's a surprise to many that the MK6 Festa ST didn't get a spruced up version of the 1.7