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So I decided to try the Gen2 pushrods in my motor today. Seeing quite a few people have had sucess with them in the past, I wanted to see if custom pushrods were really necessary, and if so, by how much.
Here's how it went down:
After torquing the heads down, installing the cam and lifters (#1 TDC), I followed the procedure for adjusting valve lash to get the correct lifter position. I then used the end of a cliper to measure how far down the edge of the lifter was (measuring off the outside of the lifter to the flat area of the hydraulic movement). Then tightened the rocker stud snug to the heads while measuring the movement.
Using the spin method and watching the caliper, we got about .005-.010" of movement before there was resistance on the rotation of the p-rods. Then another ~.027" until snug. We then tried it on another lifter (they were soaked in oil for about 36hrs, new lifters) and got the same .037". Then for the heck of it, we tried the same lifter (oil level is now lower inside the lifter) and got more like .060".
Then finally, using the same spin method and watching the caliper, I got about 7/8's of a turn on the rocker stud before being snug (about 25ftlb).
What do you make of it? The p-rods should work fine for me temporarily, but adjustable will be comming soon as I can snag some 8mm-3/8's adapting studs to use the AL full rollers I have. Does this sound about right to you?
Here's how it went down:
After torquing the heads down, installing the cam and lifters (#1 TDC), I followed the procedure for adjusting valve lash to get the correct lifter position. I then used the end of a cliper to measure how far down the edge of the lifter was (measuring off the outside of the lifter to the flat area of the hydraulic movement). Then tightened the rocker stud snug to the heads while measuring the movement.
Using the spin method and watching the caliper, we got about .005-.010" of movement before there was resistance on the rotation of the p-rods. Then another ~.027" until snug. We then tried it on another lifter (they were soaked in oil for about 36hrs, new lifters) and got the same .037". Then for the heck of it, we tried the same lifter (oil level is now lower inside the lifter) and got more like .060".
Then finally, using the same spin method and watching the caliper, I got about 7/8's of a turn on the rocker stud before being snug (about 25ftlb).
What do you make of it? The p-rods should work fine for me temporarily, but adjustable will be comming soon as I can snag some 8mm-3/8's adapting studs to use the AL full rollers I have. Does this sound about right to you?
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