Peak Torque vs TC Lockup

[GasSavers_backslash]

I was told in a few eariler posts that a Gm V6 3.8 (which is what I have) gets it's best milage right at tc lockup which is 50 mph and just below the the 1500 mark on the tach. However a new post i read (which is said to be stickyed soon) says that a FE "sweet speed" happens at peak torque which according to the post, happens at a much higher rpm to match piston speed. This is very confusing so I hope someone could clear this up for me.

http://www.gassavers.org/showthread.php?p=87202
http://www.gassavers.org/showthread.php?t=7130
These are the posts I'm refering too.


Thanks in advance.