what did ford do to bump hp in 05
#2
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Location: Tulsa, OK
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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.
#6
Originally Posted by Every_Mn
Look what he drives..
#8
Legacy TMS Member
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Originally Posted by Every_Mn
Look what he drives..
I knew they went to 3 valves. Just wondering what else they did. Thanks folks.
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SMBJoshy
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8/16/15 02:48 PM