Old Nov 9, 2008 | 06:38 PM
  #21  
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Canada1
Too many posts.. I need a life!!
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Joined: Feb 2006
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From: Canada
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Hi all,

I was not trying to start any forum feuds.
There has been very little (if any) development work on the Ford CVH
engine here in Canada (or North America). I love the idea of developing something that
is common, and quite cheap. The 1987 escort rst is a great looking car. There are none
around these parts. I am attempting to take a 2 door 1987 escort, and make an RS clone.
Sure there are better, more modern engine designs. The new Duratec is miles ahead of any Zetec ever built. But, the Escort did not come with a Duratec, and I would like the factory appearance under the bonnet.

Developing a powerful, efficient 1.9 CVH turbo is what I am attempting to accomplish.
Engine development starts with the cylinder head. People mention stage 1 through stage 3,
without much information. Cylinder head modifications are all about air flow (as we cannot do much about the combustion chamber), and port cross sectional area.

There has not been much information provided by anyone (other than CNC Heads) about
CVH head modifications and the results. IT has been mentioned that CVH head modifications
and flow testing has been flogged to death - I havent found much information anywhere.
How can one select a turbocharger, camshaft, throttlebody size, etc. without knowing
cyclinder head flow? The flow capacity will tell one what rpm range the cylinder head is capable of, thus camshaft and turbo selection is simplified. This should not be a trial and error approach - as that can be expensive.
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