Front suspension is from the 917 CanAm racer, as are the massive brakes, but the rear semi-trailing arms are from the road car but feature cockpit adjustability to compensate for weight change as fuel is burnt off. Bilstein Gas shocks are employed all round.
Brakes are cooled with vents leading to cooling ducts feeding vented discs and four pot calipers and are helped by more air being sucked in by the black finned wheel covers fitted to the wheels. Early cars had wheels all round but these were changed to 5 spoke magnesium rear wheels as development continued. Tyres are 15 inches wide on the rear and 10.5 inches wide on the front and shod with specially made Dunlop tyres which were of a very low profile for their time being just 2 inches high.
Group 5 rules allowed much engine modification and the wider rear wings allowed space for a lot of the engine ancillaries. The basic engine block and crankcase had to remain stock. The engine capacity is 2857cc which when multiplied by the FIA's 1.4 factor for turbocharging works out to 3999cc. Alterations to the standard engine include titanium con rods, Bosch fuel injection, dual spark plugs and higher turbo boost pressure from the huge KKK turbocharger which was adjustable from within the cockpit, anything between 1.2 and 1.5 bar giving a power output between 550-590hp at 7900rpm.

Initially the 935 ran with standard looking front wings with upright headlights but after careful study of the rules Porsche engineers discovered a loophole in the rules that allowed modification to the front bumper and moved the headlights from the wings and into the bumper, reducing drag and creating more downforce for which the slits in the wings help greatly. The rear wings were also modified and shaped longer with a sweep up at the rear and little lips added to help create more downforce.
The engine cover and rear wing were also modified as time passed but this was due to the rules rather than evolution. Initially the car ran with an air to air intercooler but the FIA deemed it illegal and Porsche were forced to use the water to air intercooler from the 934 and use the engine cover from the road going 930 model though still using the huge split level rear wing!

Played with a filter for this shot....

 

Beautiful pics and great background, Guiddy

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I've only just seen this, Martini Porsches are awesome!! Such an iconic livery! I've got a lot myself, but I'd love an Exoto 935 Martini car!!