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2004 - 2008 F150 2004, 2005, 2006, 2007 and 2008 Ford F150's with 5.4 V8, 4.6 V8 or 4.2 V6 engine
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Old 08-05-2014, 11:40 AM
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120mm Jedi 120mm Jedi is offline
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interesting

Thanks Andy, I'll do some more digging around.
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Old 08-15-2014, 04:29 PM
jgoedker jgoedker is offline
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Hi,

I noticed a lot of comments about VCT and weather it's good or bad in a F150. I agree, probably not. But you have to consider the pressure on the manufacturers to squeeze more MPG's. Every gimmick has to be looked at.

As for VCT? Back in my sprint car days which were also the early days of cam timing, a lot of guesswork was put into this subject. Yes the power was gained at high RPM's. But, we also ported the heads to the max. Low RPM operation was not even considered. Ford using VCT does allow them to gain HP while leaving port sizes relatively small and therefor not effecting low RPM performance or producing hesitations at low RPM's. With the port and timing configurations we used, the engine would just about kill below 2000 RPM due to the large ports and high airflow. My 04 F150 I feel, is a very nice balance. Hopefully it all continues to work as it should.
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Old 08-15-2014, 04:29 PM
 
 
 
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