Just a couple of points.There is NOT a lot of material on the intake ports,this is one of the thinnest areas on the head.The inside of the combustion chamber can be milled 'lightly' to smooth it out and some heads have a cast in 'tongue' between each intake and exhaust valve, this can be removed.On the valve job its the 'back angle ' of the valve that needs to be modded to reduce reverse flow.If you have any data on the Cosworth 2.0 cylinder head you should use that as a guide for mods to the Duratec,works quite well.As a final point ,ALL the combustion chamber volumes must match AND the port volumes,if you want to do it right.regards Terry Haines
V6 MTX
'Don't p**s up my back then tell me it's raining!!!"
'Its only nuts & bolts!'
'If I build it,fix it,upgrade it or modify it...MAYBE they will come....!
Haines Motor Sports Inc,
Dealer for 'Quaife America' & 'Autotech Sport Tuning'
SOLE USA Dealer for the American Axle 'AUSSIE BAR'...
Get a Turbo for you Zetec from HMS Inc...by 'The Demon' ...www.DemonDynamics.co.uk
..don't talk about it DO IT !!!
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