VVT concept
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Fleet Mechanic
Joined: Feb 2004
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From: River Valley AR
Endless possibilities....
You may have seen these before but check them out if you haven't
http://www.coatesengine.com/csrv.html
You may have seen these before but check them out if you haven't
http://www.coatesengine.com/csrv.html
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Joined: Dec 2001
Posts: 22,436
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From: Louisville,Ky.
Originally Posted by bodabdan
I think the early ZR1 vette also used this method. They had a valet feature that disabled half the intake runners via a butterfly valve.
Beemer-
If lift and duration are controlled electronically with a solenoid operated valvetrain, then is a cam even necessary?
Another assumption of mine- VVT would allow you to change the intake centerline of the cam to make a stronger motor (torquey) on the bottom end and a stronger ( scavenging) motor on the top end. What do the OEM's claimthe advantage of VVT is?
Beemer-
If lift and duration are controlled electronically with a solenoid operated valvetrain, then is a cam even necessary?
Another assumption of mine- VVT would allow you to change the intake centerline of the cam to make a stronger motor (torquey) on the bottom end and a stronger ( scavenging) motor on the top end. What do the OEM's claimthe advantage of VVT is?
The new 3v Ford engines use spring loaded actuators that hold the cams advanced and are valved to send oil pressure the the actuators to retard the timing at higher rpms.
This gives the 5.4L 3V 85% of it's torque at 1000rpm.
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tkawaoka
Explorer, Sport Trac, Mountaineer & Aviator
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Aug 12, 2010 10:20 PM
