1991-1993 Toyota Eagle MkIII

Images copyright Michael J. Fuller and Ryan Hicks
Text copyright Michael J. Fuller

The Toyota Eagle MkIII is visually dominated by the car's massive intake ducts.  The ducts route cooling air from above the splitter, around the front end of the monocoque, through the doors,  to intercoolers and radiators located in the side pods.  Cockpit cooling was siphoned from the primary brake feed.  The high sided nature of the MkIII was designed to reduce drag as well as improving airflow to the rear wing.  The MkIII had around 15% more cooling capacity than the MkII though Drino Miller had the engine developing more power so the added cooling capacity went to a worthy cause.  Once heated, the cooling airflow exited the car out through the back of the engine bay, drawn by the low pressure area present there, and helping fill in the base area reducing overall drag.  In addition the engine bay flow through helped keep the engine bay cooler, providing one more benefit.
The center duct feeds the brakes as well as the cockpit with the cooling feed going into the monocoque at the footbox.  Initially there were concerns given the length of the inlet cooling ducts and potential  boundary layer build up as air traveled through the ducts.
With the ducts removed it becomes apparent just how narrow the front of the monocoque is, being about as wide as a single seater, this to allow room for the massive cooling ducts, but perhaps more importantly, the front diffuser.
Front end packaging is rather tight.  Note that the cooling duct bears witness to having to clear the frontsuspension via a chamfer that matches the pushrod angle and upper A-arm.
The pushrod actuated front suspension.  The trailing edge of the front diffuser can be seen as it exits the car aft of the front suspension.
The front springs are located on top of the monocoque, underneath a scuttle that is accesible only by removing the front windscreen when the front nose is on.

ęCopyright 2008, Michael J. Fuller