Originally Posted by
Johnny Knoxville
Problem with the silver top is cam choice, running wild cams will need oversize bucket bores and just the machine work is £350+
ST170 wild cams don't need that machine work as cam have been developed well over the years and don't need bucket machine work. And the there are so many cams on the market for these engines.
I've discussed all this with Andrew@ALD as he will be building me my engine for my Fiesta.
I think when looking at a £6k plus build £300 is largely irrelevant given you'll generally pay more for the engine unless youre lucky. I hope your engine works out as planned
If I was the OP I would deffo not look to tune the zetec to 250 n\a unless its required in the regs for a race series......Duratec would be far easier
