Cylinderhead thermal-insulators

A.S. Motorsport thermal insulator for NSX cylinder-heads both C30A and C32B engine

Material,
We've gone for a hard laminated phelonic material with integrated gaskets,
Why? 
So we can insure that the spacers don't deform once the manifold is torqued to spec and engine is at operating temperature.
It also allows us to insure uniform dimensions and calculate the effects.
Even the integrated gasket layers are calculated for compression so they don't interrupt flow. 


Thermal shield (cylinder head to manifold spacers) 
I started from a clean sheet trying to optimize thermal insulation and take in to account the 90' degree bank angle of the engine. 

As some of you know there has been some discussion on how thermal spacers might interrupt flow in to the runners due to the step/hump created in the runners.
We did computer simulations on the matter, from that we based our design making sure flow and resonance pulsations aren't interrupted.

Having done that we made a number of prototypes optimizing insulation of the manifold.
This is done by creating a full shield that is molded to the casting of the cylinder head, it allows for a secondary F1 style heat shield that insulates the valve covers and injectors as well (still in R&D stages) 

This design isn't based of the gasket design used by Honda (alternative phenolic gasket on the market are basically just thicker OE gaskets).
As can be seen it makes for a flush fitting thermal shield instead of a just a gasket spacer.