460 Ford Forum banner

1 - 2 of 2 Posts

·
Registered
Joined
·
2,673 Posts
Discussion Starter #1
In a previous post, from the old board lol, you stated that the 460 needs cam timing from between 230-240 at .050 in order for the engine to develop maximum torque. So, running a smaller cam than that, it is not giving the engine enough timing to breath? I'm trying to understand why. Thanks.
 

·
Premium Member
Joined
·
9,045 Posts
That is information I got from...


...a vizard article. I believe it is a matter of the amount of time the intake valve is open but also a matter of valve lift too. If you add additional duration @ .050" the torque does not necessarily increase but the rpm at which peak occurs increases.

So long as the port continues to flow as the valve opens adding additional lift will generate more torque at a given duration @ .050" lift. Problem is that their are limitations with regard to how much lift per degree of duration we are allowed to have especially with a flat tappet cam and our lifter diameter of .875". That is one reason why solid roller cams work so well. More lift vs duration and faster acceleration when the solid rollers advertized duration exceeds 270 degrees.


:mrgreen:
 
1 - 2 of 2 Posts
Top