 The rear suspension picks up on a combination of the oil tank/bellhousing and the gearbox. |
 The
oil tank is cast from magnesium and is a load bearing structure with the
loads from the rear suspension, in addition to the chassis A-fames, all
converging. |
 The MkIII’s engine was an evolution of the HF 89 power plant and mated to a March-derived 5-speed transmission via the cast magnesium bellhousing. As common practice, the oil reservoir was integral to the bellhousing. Steel A-frames (missing in the photo) ran from the monocoque rear bulkhead and either side of the engine to the red anodized shear plate which then attached to the bellhousing. |
 The
Toyota 503E 2.1 liter single turbo engine wasn't installed fully
stressed, instead relying on a structural cam cover (shown here) and oil pan to
increase the beam strength. |
 For
the 1992 season (starting at New Orleans) the turbo intercooler
was swapped with the water and oil coolers, moving into the left hand
sidepod. This helped drastically reduce pipe lengths leading to
better throttle response. In addition to those changes, the turbo
inlet periscope was eliminated. Instead, turbo induction came via an
airbox that was fed from the left hand side intercooler ducting. |
