Should valve lash be adjusted at certain intervals? Or is it a once and done thing? Took the car to the track and she was barely running stock times, not much done to her but still. Hook-up wasnt bad, reaction times were pretty much excellent, something has got to be wrong. Looking to nail it out. Thanks!

 

On a hydralic roller rocker you should be able to set the lash and be done with it if done properly. Only if running a solid roller cam and lifters should you have to worry about pericodic rocker arm adjustment.
HVY SS