17. Now you are ready to set the lash according to your camshaft manufacturer’s specifications if you are running a solid cam. Lash is a good way to test whether your cam is properly spec’ed for your engine package. Decreasing lash removes some slack in the system, and slightly increases both lift and duration. This effectively makes the cam act larger, or more aggressive. Doing the opposite, or adding additional lash, reduces both lift and duration and makes the cam act smaller. Normally, the best way to test the effects of lash changes is on a dyno, but you can also test the differences at the strip although the changes will be slight. If running a hydraulic camshaft, the proper adjustment is to remove all play from between the rocker arm, the push rod, and the lifter. Once this is done, give the adjuster approximately one more half of a turn.