Quote:
Originally Posted by Talonmotorsport
The zetec is a better engine erm that depends on your point of view regarding making it run,tuning it and the cost of doing this. If your not very savy with elastictrickery like me then a zetec engine is a bugger to make run.
Lets start with the Ford ignition and fuel system that comes with a standard engine you have to trace the wires and the 'pin outs' on the ECU this includes by passing the imobiliser. You could use the standard injection system, but the plastic inlet manifold does'nt fit under a roadster bonnet,so you will need a fabricated manifold.
An option is megajolt and carb(s) but that still requires an ECU and a fabricated inlet manifold or machining to make a CVH one fit.
Then there's the cost of an ECU if you are clever then get in to the DIY mega jolt/squirt option "100-200 or spend £300-600 on an after market stand alone ECU such as Omex.
Suddenly a ZVH with a 1600 CVH head with a 285 cam and carb(s) matted to a 2000cc Zetec short block using 4 wires to make it run making 160hp does'nt look so bad does it?
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If you're not able or willing to use the zetec with the bike carbs/megajolt option which in my experience is no more complicated than points and condensor then you would use the sierra cvh as it comes since you cant get much simpler than that!
In terms of performance the zetec, for an equal level of tuning, will out perform the cvh/zvh. Simply if for no other reason than the two valve hemispherical combustion chamber will always produce less bmep than four valve pent roof chamber of the zetec.
There are plenty of 180+ hp zetecs around but few non-turbo'd cvh's around at that power.