what did ford do to bump hp in 05
Mach 1 Member
Joined: October 17, 2005
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From: Tulsa, OK
Here's part of the reason, from Car & Driver:
"The base 4.6-liter V-8 now features an aluminum block and receives the SOHC 3-valve aluminum cylinder heads and variable-cam-timing mechanism from the new Ford F-150’s 5.4-liter V-8. Engineers have squeezed more airflow efficiency from the heads, in part with a computer-controlled intake flap that varies the port sizes with engine speed. At low speeds the flaps constrict the passages to create a venturi effect and induce turbulence for better charge mixing. At higher speeds they open wide to let past the rushing atmosphere."
I believe they also gave it a slightly less restrictive exhaust as well.
"The base 4.6-liter V-8 now features an aluminum block and receives the SOHC 3-valve aluminum cylinder heads and variable-cam-timing mechanism from the new Ford F-150’s 5.4-liter V-8. Engineers have squeezed more airflow efficiency from the heads, in part with a computer-controlled intake flap that varies the port sizes with engine speed. At low speeds the flaps constrict the passages to create a venturi effect and induce turbulence for better charge mixing. At higher speeds they open wide to let past the rushing atmosphere."
I believe they also gave it a slightly less restrictive exhaust as well.
Originally Posted by Every_Mn
Look what he drives.. 
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Legacy TMS Member
Joined: August 7, 2006
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From: In Boredom
Originally Posted by Every_Mn
Look what he drives..
I'm here just getting some info and hoping to get a 06 or 07 very soon. I knew they went to 3 valves. Just wondering what else they did. Thanks folks.
<----- me j/k also
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