Porsche Lightweight 911 993R By Paul Stephens Autoart

Car specification:

Base Porsche 993 Carrera 2 weight of 1,370 kg reduced to 1,190 kg (dry) 1,220 kg (wet) for 993R
330 bhp (at 7,400 rpm) 3.8-litre flat-six engine with 360 BHP option
270/295 bhp per tonne (wet weight)
993 G51.21 six-speed gearbox with lightweight flywheel and clutch
Wavetrac limited slip differential
Five-way adjustable suspension with five settings controlled by a bespoke ECM created in conjunction with suspension specialists Tractive and Center Gravity
Complete redesign and application of panels, including seam-welding and composite applications
Integrated roll-cage and fully bespoke interior including carbon fibre Recaro seats, and all non-essential electronics deleted to reduce weight and improve engagement
Engine specification:

Capacity enlarged from a 3.6- to 3.8-litre engine with the following upgrades:
Engine cases – boat-tailed and stress relieved
993 RSR barrels and pistons
Pauter lightened steel con rods
Porsche OE 997 GT3 oil pump
Porsche OE 997 GT3 crankshaft and bearings
PS specification camshafts with solid Porsche Motorsport lifters and adjustable rockers
Individual throttle bodies adapted to PS specification
Exhaust system:
PS modified Cargraphic performance exhaust system with stainless steel heat exchangers.

PS Autoart designed and manufactured engine shroud to increase air-cooling efficiency.
Larger intakes are fitted to the front power unit to increase brake and oil cooling airflow efficiency.

Materials and body panels:

Seam welded body
Integral roll-cage
Composite additions to the exterior to reduce overall mass
Weight reduction of the exterior:
No panel is left unturned, including 993R-only composite panels and bespoke fixings.

The electric sunroof is deleted and a new roof panel fitted
Original steel bonnet is replaced with a genuine Porsche Motorsport aluminium version weighing 8 kg
Additional lightweight manual electric mirrors weighing just 0.25 kg for the pair
Deletion of rear wiper and mechanism
PS Autoart engine lid made in composite, weighing 8 kg, with courtesy lights
Porsche Motorsport glass for side and rear windows
Front and rear bumpers replaced with PS Autoart composite items weighing 9 kg each
Weight reduction of the interior:

Complete original interior removed including dashboard assembly
Lightweight PS Autoart composite panel system fitted including new door closure panels and 993 Clubsport-style knee roll
Original electric seats replaced with carbon fibre Recaro bucket seats
Simpler, lighter wiring loom
Electric windows deleted
Central locking deleted
Door grab handles deleted
Glovebox deleted
Centre console deleted
Audio deleted
Factory air conditioning deleted, and replaced by a lighter electric system mounted in the front of the car for improved weight distribution
Interior roof courtesy lights deleted
No longer required OE factory switches deleted
Airbag delete option as on 993 Clubsport

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