Originally Posted by
XRT_si
You can't use the standard ST170 inlet manifold for turbo charging, and the ports don't line up with a standard Zetec head, so no off the shelf inlet can fit/work properly
The FRST manifolds are used regularly as they solve issues with fuel rails basically as a custom fuel rail is needed to run top fed injectors on a Zetec inlet, which people don't want to go through the hassle of
Why not use a standard Focus 1.8/2.0 inlet? They have end fed injectors?
The port spacing can't be far off, as I've seen people use the ST170 lower inlet as the basis for a ITB conversion on a silver top engine with standard head? Exhaust manifold from ST170 can also be fitted to other Zetec lumps, so port spacing can't be a million miles out for either manifold?
Just seems a funny way to go, pissing about with adaptor plates, and an inlet that is even less related to the engine, when surely a normal Zetec one can do the job.
What did Simon who used to work on PF use when his ST170 was turbocharged?