482 fe intake issue

[Gaz64]

The roller should start from the rocker shaft side of valve stem centre, roll ACROSS centre at half lift, then be at back to the start point at full lift.

Yours appears to start at centre, and by full lift is coming to far away from centre at full lift.

So your valve stem height needs to be increased, longer valves, a lash cap, or lower the rockers. Lash cap is by far the easiest way.

Your roller moves too far, especially since this happens at the highest load at max valve lift.

Gary

[blykins]

It’s because on the “full lift” picture he has “input” way more lift than what he has. He is trying to go to whatever mark that is on the valve and that’s not accurate. When the valve lock groove is almost touching the valve seal, that should be an indicator that somethings not right with the experiment. If you try to open the valve an inch, you’re gonna see something like that.

There is nothing wrong at all with that first picture. T&D rockers are some of the easiest to set up and I’m probably the most anal about setting up valvetrain geometry.

In addition, pushrod length has nothing to do at all with geometry on a shaft mounted rocker.