Topsp33d wrote: ↑Mon May 16, 2022 1:01 pm
Some people think that tight lash helps, but I’m wondering if that is the only useful aspect.
The lash itself, doesn't effect the noise. The velocity at that lash point does.
With certain types of lash ramps, the tighter you set the lash, the lower the velocity is at that lash point.
This is also true with some of Comp's designs, and Harold's designs, where there is no lash ramp on the opening side. It just accelerates extremely fast, right off the base circle. With those, tightening the lash .002"-.003" could decrease the velocity at the lash point by 50%.
Our Inverse Radius designs allow us to run less velocity at the lash point, and then accelerate the valve faster then flat flanked designs to gain more area under the curve. When comparing our IR designs to others designs with the same area, ours will have a much lower velocity at the lash point. This is done for durability and reliability. A quieter valvetrain is just a byproduct of that.