Z28x said:Ford is on the right track with there 3 valve SOHC V8s.
You are correct sir!
The 2005 4.6L 3 valve engine puts out almost as much HP & Torque as the 2003 - 2004 4.6L DOHC 4 valve engine (Mach 1) and it does it on regular 87 octane, not the 91 octance the Mach 1 engine requires!
The SOHC 3V heads are 90% - 95% as good as DOHC 4 valve heads, but they are physically significantly smaller, lighter and lower cost to manufacture.
The SOHC 3V heads flow almost as well as the DOHC 4V heads making the biggest advantage of DOHC the ability to independently vary the intake and exhaust cam timing. But I doubt that Ford will implement dual VVT on its DOHC engines any time soon.