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SportTrac Discussion
Engine & Drivetrain
Thermostat Housing: Why they leak and permanent fix
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<blockquote data-quote="EddieS&#039;04" data-source="post: 1035730" data-attributes="member: 61136"><p>IMO, the best use of the plastic nylon, is the intake manifolds. Other than some at the TB throat. The runners usually are supported of more HP than the metal runners. They dont have to be extrude honed. Runner ID is generous and smooth, and less heat soak. Port matching is good for OEM also. Ford did have some early 4.6L lowers that cracked though.</p></blockquote><p></p>
[QUOTE="EddieS'04, post: 1035730, member: 61136"] IMO, the best use of the plastic nylon, is the intake manifolds. Other than some at the TB throat. The runners usually are supported of more HP than the metal runners. They dont have to be extrude honed. Runner ID is generous and smooth, and less heat soak. Port matching is good for OEM also. Ford did have some early 4.6L lowers that cracked though. [/QUOTE]
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SportTrac Discussion
Engine & Drivetrain
Thermostat Housing: Why they leak and permanent fix
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