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I am getting close to finishing the engine for my '75 F150, but I have some questions regarding pushrod length.
I spent hours last night reading about pushrod length and valvetrain geometry but I'm still a bit confused.
This 460 has iron heads with the oem non-adjustable rockers, oem pushrods, aftermarket hydraulic lifters, and a Melling MTF-3 cam. This cam has lift of .485/.511 with the factory rocker arms. I also put in the springs that Melling spec'd for this cam.
I did the test where permanent marker is applied to the tip of the valve stem, rocker arm assembled, and the engine turned over 2 or 3 times to see the wear pattern. On the 4 or 5 that I tested the pattern was in the center-ish of the valve tip.
What else can I do to assure the stock length pushrods will work alright with my set up? Help is greatly appreciated!
I spent hours last night reading about pushrod length and valvetrain geometry but I'm still a bit confused.
This 460 has iron heads with the oem non-adjustable rockers, oem pushrods, aftermarket hydraulic lifters, and a Melling MTF-3 cam. This cam has lift of .485/.511 with the factory rocker arms. I also put in the springs that Melling spec'd for this cam.
I did the test where permanent marker is applied to the tip of the valve stem, rocker arm assembled, and the engine turned over 2 or 3 times to see the wear pattern. On the 4 or 5 that I tested the pattern was in the center-ish of the valve tip.
What else can I do to assure the stock length pushrods will work alright with my set up? Help is greatly appreciated!