Originally posted by 96mercury:
opening the ports too much will reduce velocity right,
Thats right. If the ports are too open velocity will only be good in the upper RPM ranges, leaving the lower range with less throttle response, and almost no torque, which our engines dont exactly have an abundance of anyway.
Originally posted by 96mercury:
so maybe just remove harsh obstacles from the casting process and polish them up for even higher velocity potential.
That sounds good. The hardest part is keeping all the ports the same, not removing more material from one than the other, etc. Usually gasket matching and removal of any casting flash and rough spots is enough to notice, although I have no experience with how good Zetec heads are from the factory. Just dont hog out the ports and you should be ok.
-Ken V.
1998.5 SE Praire Tan Zetec ATX
psycho_bass@hotmail.com
Roush springs Roush rear sway bar BAT struts 17" Millie Miglia HT3 and a ton of subtle asthetic mods
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