Heat shield, where needed?

[Daniel Lorenz]

Going to install some heat protection soon in the engine bay. I am uncertain as to what extent it is needed thought.
The obvious ones are engine harness, ignition cords and crossmember for the "horse shoe" since it is really close to the exhaust.

But besides that, where is it needed?

Alot of the air in the engine bay should be refreshed at a good rate because of both the side intakes and the top and rear exit grids.
But is it enough to ignore heat protection on everything further away than 4 inches from the exhaust?

 

[Ian Anderson]

Road or track car?

If road, when stationary at lights etc no air movement past the engine etc.

I fitted a 400cfm marine bilge fan on each side with a manual switch..the firewall would go from extremely hot to hold your hand on once they had run for a minute or 2

Ian