YellaTerra Rocker to Head Clearance
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Have a buddy's car Im working on that using the YT 1.7:1 rockers on stock LQ9 heads. The heads havent been clearanced for the rockers, but they appear to clear. I used a feeler gauge to check the clearance between the rocker and the side of the head, and through the entire motion (rotated crank by hand) they have about .004 to .005 clearance. Is this enough or will we run into issues down the road at high load/rpm? Ive attached a couple pictures for reference.
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Yes, ended up needing one .040 shim under each pedestal. Pushrods and preload were adjusted accordingly. Still waiting to hear back from YT and Texas Speed as to what they think about the clearance... Anyone else care to chime in?