Have you shimmed your head properly with a shim plate(Kent Moore plate, I have one and would sell it if needed) or something like the rps sport shim tool with dial indicator? Also are your hydraulic lifters bleed correctly and not worn out? Did you get a valve job done and they did not check valve stem height? Are you running big cams with aggressive lift with soft valve springs? All of this could be your problem.
If memory serves me right, each shim just has to be leveled with the right side of the arm for each rocker arm.
There's a bunch of crazy things you can do like the mazworx valve stem conversion, idea behind is that less mass = less force.
I have not had a problem with my built head. But I'm not running anything crazy... I hit the rev limiter quite a bit also.
Super tech beehive dual springs [email protected] with titanium retainers.
Super tech valve stem seals
Hks 264 step 1 in/exhaust
Nissan oem valves
Nissan oem rocker arms
Valve guides re-sleeved with liners
3 angle valve job and shimmed with Kent Moore plate.
