The pic I posted shows the Megulars Zetec Drag motor developing over 1000bhp

If it was sub 500bhp then it wouldn't be pulling sub 9 sec quarters

My engine develops similar power outputs at similar boost levels to a cossy engine but mine is modified.

Mike seems to know a little knowlege about head flow rates

Go on then Mike, what does a standard zetec head flow at 0.5" valve lift on the inlet side with 10" of water and whats the best CFM you mananged out of a cossy head then?

Flow rate does depend on type of casting on the Zetec, (model car and year), so for Mike's sake we will make it easy for him and say a early Mondeo Zetec head.

I would like you to give us all a lesson in head flow between the Cosworth head and the Zetec head. Please also quote figures and where you have got them from.

Facts please, Opinion is no good.