Porsche 911 991 GT3
Low mileage, Left hand drive, 2015 991 GT3
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This left hand drive classic Porsche 2015 GT3 comes painted in red with a black interior. It has just over 14,000 miles on the clock with a powerful 3.8 litre engine. For more details about this modern classic car, call Signature Motor Company on 0207 118 2299 today.
- Engine 3.8 L 475 PS (349 kW) H6
- 4.0 L 500 PS (368 kW) H6
- Length 178.94 in (4,545 mm)
- Width 72.91 in (1,852 mm)
- Height 49.96 in (1,269 mm)
History if the Porsche 911 991 GT3
Porsche introduced the 991 GT3 at the Geneva Motor Show in 2013. The 991 GT3 features a new 3.8 litre direct fuel injection (DFI) flat-six engine developing 475 hp (354 kW; 482 PS) at 8,250 rpm, a Porsche Doppelkupplung (PDK) double-clutch gearbox and rear-wheel steering. The engine is based on the unit fitted in the 991 Carrera S, but shares only a few common parts. All other components, particularly the crankshaft and valve train, were specially adapted or developed for the 991 GT3. For example, the 991 GT3's engine uses titanium connecting rods attached to forged piston, in order to allow the engine to reach up to 9,000 rpm. The dual-clutch gearbox is another feature specially developed for the 991 GT3, based on sequential manual transmissions used in racing cars.
After a number of engine failures, it was discovered that the supplier of the connecting rod bolts had made a production error in the alloy of the bolt. Subsequently, all 785 of the GT3s that had been produced up to that point were recalled to the dealership organisations and fitted with new engines, and all owners were issued with an extra year's warranty.
A formal letter sent to Porsche from members of the US-based Rennlist.com "991.1 GT3 Concerned Owners Group" about additional engine durability issues lead to a meeting between representatives of the owners group and Porsche, including head of Porsche Motorsport Dr. Frank-Steffen Walliser, on 3 August 2017 at the Porsche North America Atlanta headquarters. According to Dr. Walliser the concerning high-RPM misfire issue could be traced primarily to a metallurgical defect in certain batches of "finger followers" (valve train rocker arms) and secondarily to individual driving patterns and engine variations - such as temperature, oil quality, oil viscosity and parts tolerances - that lead to increased wear of the specific parts. In response to the issue and after implementing new engine tests to trace down the issue Porsche had developed revised camshafts and finger followers and offers a fully transferable 10-year, 120,000 mile extended engine warranty to all 991.1 generation GT3 owners world-wide that covers the replacement of the defective engine with a new engine with the revised parts if failure is a direct result of the finger-follower issue.