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Discussion Starter #1
Do aftermarket heads flow very much more than the SVT head? Word has it that the SVT head is really nice on the flow bench.
 

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The Librarian
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Discussion Starter #3
Aside from the VCT servo galleries, what other differences are there? Bigger valves, and ports I assume but if the combustion chamber different? What about the port geometry?
 

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SVT Fanatic
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for how much it costs, it's not worth doing for what gains you get out of it
 

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Discussion Starter #5
I was not considering getting a new head. I was just curious as to the differences between the Zetec head and the SVT head.
 

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FF Affiliate
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Combustion chamber and Exh ports are almost exact between the 2 heade the Diff is in the Intake runners they are raised as well as bigger in the SVT

Tom
 

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The Librarian
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13,116 Posts
^^^And:
1) The intake valves are 1.5mm larger at 33.5mm. (not sure about the exhaust, they're 28mm)
2) Stiffer springs by 27%-intake and 19%-exhaust.
 
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