1991-1993 Toyota Eagle MkIII

Images copyright and courtesy John Brooks, Mark Windecker, John Machaqueiro, Ryan Hicks, John Hutnick, and Michael J. Fuller
Text copyright Michael J. Fuller
Toyota Eagle MkIII, Sebring 1992, Copyright Michael J FullerThe Toyota Eagle came on scene in 1991, right at the peak of the Nissan years, and immediately looked the picture.  Visually functional, but really how effective?  After all, the engine still was the diminutive turbo-charged 2.1 liter, four cylinder.  Twenty-seven races later, in 1993, the record spoke for itself:  21 wins since its inception.

But the story of the MkIII's 1992 and 1993 sucesses goes back further than that.  By 1990 it had become apparent to Gurney and the design team at All American Racers that the Toyota HF89 had little room for additional improvement.  "When we were in the window, the car was good in every way," says Fangio, "but out of the window, the car was not right at all."  Thus plans were put in motion to take into account what was deficient in the HF89 and apply the lessons learned to a new chassis.  As John Ward states, "The GTP cars were essentially evolving from a Porsche Le Mans car, a good design but one that had been around for a few years.  Nissan had upped that a bit, but we thought there was a lot more that could be done." 

John Ward and Aerodynamicist Hiro Fujimori would design the new Mk III, internally called the WFO 91 (Ward, Fujimori, others 1991).  Ward was not unfamiliar to All American Racing, he had worked for them on and off over the years and the MkIII was his third "Tour of Duty."

Drino Miller of Toyota Racing Development (TRD) was responsible for engine development with Dan Gurney overseeing the entire project.  A new engine management system was developed to work with the sixteen-valve four-cylinder motor that had been successfully used in the HF89.

The team started with a clean sheet but with the experience of the entire portfolio of AAR chassis in mind, the GTO cars, the MkI and HF89/90, and the Indy Cars.  AAR’s design priorities had been well honed with all these past projects and the mantra was rather straight forward; keep the engine happy, keep the driver happy (cool), make the chassis crashworthy and robust yet stiff and light, apply sound aerodynamic thinking yet leading edge, and make it as simple as you can.


The MkIII was internally known as the WFO 91, which stood for
Ward, Fujimori, and Others (or on the cheek as Wide F'in Open).  Here are some additional interviews with indeed the W, F, and O of the project....

>Chief Designer, John Ward
>Head of Aero, Hiro Fujimori
>Model Shop Manager, John Hutnick

Click on each image below...
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1991-1993 Toyota Eagle MkIII Specifications
Designer: Hiro Fujimori, John Ward
Layout: Mid-engine, rear-wheel drive
Monocoque: Carbon fiber and aluminum honeycomb
Engine: 2.1 liter, Toyota 503E, I4, 16-valve, single turbo
Horsepower: 800+ hp (1992 54 mm air restrictor)
700 hp (1993 52 mm air restrictor)
Gearbox: Ray Eades March 5-speed
Steering: Rack and pinion
Suspension: F: Upper and lower wishbones, pushrod, inboard mounted spring/damper
R: Upper and lower wishbones, pushrod, inboard bellhousing mounted spring/damper
Brakes: 14 in. ventilated discs (1992: carbon, 1993: iron, due to IMSA regulation change), with Brembo four-piston calipers
Wheels: F: 17in. x 13in.
R: 17in .x 15in.
BBS alloy
Tires: F: 25.5in. x 12.5in.
R: 28.5in. x 14.5in.
Goodyear Eagle Racing Radials 
Length: 4800 mm
Width: 2000 mm
Height: 1016 mm
Wheelbase: 2667 mm
Weight: 832 kgs. (1992) 
914 kgs. (1993) IMSA regulation change
Tank capacity: 31 gal. (1992)
28 gal. (1993) IMSA regulation change
Specifications courtesy AAR
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ęCopyright 2008, Michael J. Fuller