Custom parts and system development

Cylinder head development and full 5 axis CNC machining

JHE’s system development programs typically embrace competition rocker systems, entire valve train systems, intake systems, including cylinder heads.

When creating a new racing cylinder head design, JHE employs a process which first establishes an efficient hand-ground port shape. The data is entered into a computer from which a tool path is created, enabling the computer to faithfully reproduce the shape. Using this as a base, the next step is to convert the data into a computer model. Then using analytical processes, it is manipulated—that is, reshaped into a parametrically regenerated port.

What is a parametric port and why does it matter?

In race engine development, the term parametric port refers to a model of a port generated by a computer. The computer receives data from a drawing and creates the port form from this data. The advantage of the parametric model is that it allows manipulation. Should the cylinder head designer wish to enlarge or reduce a section of the induction port or make a section perfectly straight—a task the human hand is unable to master, adjustments of this order are efficiently performed.

Analytical processes

Modern race engine development is shaped chiefly on two levels, most obviously by pioneering discoveries, astute designs, and the accumulation of ongoing data resulting from exhaustive testing. Secondly, by analytical processes that includes CFD (computational fluid dynamics). But there is so much more to the processes than the computer’s contribution.

“You can design what you consider to be the best racing component in the world,” says Top Alcohol Dragster specialist Norm Grimes, “but until it’s tested its merits are still in question.” And it’s in this arena where JHE hits its stride with a constant stream of valuable feedback.