We are dedicating some room on our website to share information about our great cars.
Some is common knowledge, some a little harder to find, hope you enjoy it!
“Kappa” was General Motors’ subcompact rear-wheel drive automobile platform for roadster applications.
The architecture debuted in the 2006 Pontiac Solstice and 2007 Saturn Sky, and the Opel GT , which ended production in 2009, though some 200 cars were built in 2010.
It has been stated by GM that the platform has only been designed to accommodate a single engine: the Ecotec.
It has also been stated by GM representatives that this platform was only designed to be left-hand drive. However, there are aftermarket tuners that have already accomplished non-trivial engine transplants in Solstices.
Since the Solstice, GM has designed another roadster that looks substantially different, but shares the same underlying Kappa platform: the Saturn Sky. The Saturn Sky was styled after the pattern of the Vauxhall VX Lightning design. There is a European version built on the same platform, essentially a turbo-engined Sky with Opel badging, under the name Opel GT.
The Kappa architecture uses major components from nearly every GM division and modern platform:
The rear axle and differential are from the Sigma-based Cadillac CTS
The Solstice’s interior storage bin is from the Y-body Cadillac XLR
The passenger-side airbag, steering column, and exterior and interior door handles are from the Delta-based Chevrolet Cobalt, Pontiac G5
The Solstice’s backup lights are from the GMT360 GMC Envoy
The heating, ventilating, and air conditioning modules are from the Hummer H3
The Solstice’s front fog lamp assembly is from the W-body Pontiac Grand Prix
The Solstice’s steering wheel is from the Delta-based Pontiac G5
The 2.4 L Ecotec engine is shared with the Delta-based Saturn Ion, Pontiac G6, Chevrolet Cobalt, Pontiac G5, and Chevrolet HHR
The five-speed manual transmission is from the Hummer H3, GMC Canyon, and Chevrolet Colorado
The five-speed automatic is from the Cadillac CTS, STS, and SRX
Ecotec LNF in a Pontiac Solstice
A turbocharged direct injected (redubbed Spark Ignition Direct Injection) Ecotec was introduced in the 2007 Pontiac Solstice GXP and Saturn Sky Red Line. In these applications, the engine is mounted longitudinally. Displacement is 2.0 L—1,998 cc (121.9 cu in)—with a square 86 millimetres (3.4 in) bore and stroke. Compression is 9.2:1 and maximum boost is 1.4 bar (20.0 psi), delivering 260 hp (190 kW) at 5300 rpm and 260 ft·lb (350 N·m) of torque from 2500 to 5250 rpm.
Engine redline is at 6300 rpm and premium fuel is recommended.
The sodium filled exhaust valves were based on technology developed for the Corvette V8 powertrains. The sodium fuses and becomes a liquid at idle, which improves conductivity and draws heat away from the valve face and valve guide towards the stem to be cooled by the engine oil circulating in this area.
The camshaft-driven direct injection systems pressurizes the fuel to 31 bar (450 psi) at idle, and up to 155 bar (2,250 psi) at wide-open throttle. The “Gen II” block is similar to the 2.4 L and also features VVT technology.
The Gen II block was developed using data from racing programs and computer simulations. The bore walls and bulkheads were strengthened with a weight increase of 1 kg (2.5 pounds). The coolant jackets were expanded to improve heat transfer, resulting in a coolant capacity increase of 0.5 liters.
In December 2008, GM released a Turbo Upgrade Kit for the LNF engine which increases horsepower to 290 hp (220 kW) and torque to up to 340 ft·lb (460 N·m), depending on the model. The kit retailed for $650 and included remapped engine calibration and upgraded MAP sensors. 
This was the final Stage 2 performance tune the Ecotec family, to date. With the demise of the GM Performance Division, performance tunes like this have been relegated to the aftermarket sector. This despite newer engines being more durable, and tuned to lower horsepower levels in numerous sport-car applications.
Unique LNF features include:
*a twin-scroll turbocharger
*cam-driven high-pressure gasoline direct injection fuel system
*dual camshaft continuously variable valve timing
*sodium-filled stainless steel Inconel exhaust valves
*low-friction cast aluminum pistons with oil squirters
*forged steel crankshaft
*forged steel connecting rods
*cast stainless steel exhaust manifold
This engine is used in:
Year(s) Model Power Torque
2007–2010 Opel GT 260 hp (190 kW) @ 5300 rpm 260 ft·lb (353 N·m) @ 2000 rpm
2007–2010 Pontiac Solstice GXP 260 hp (190 kW) @ 5300 rpm 260 ft·lb (353 N·m) @ 2000 rpm
2007–2010 Saturn Sky Red Line 260 hp (190 kW) @ 5300 rpm 260 ft·lb (353 N·m) @ 2000 rpm
2008–2010 Chevrolet HHR SS 260 hp (190 kW) @ 5300 rpm 260 ft·lb (353 N·m) @ 2000 rpm
2008–2010 Chevrolet Cobalt SS 260 hp (190 kW) @ 5300 rpm 260 ft·lb (353 N·m) @ 2000 rpm
2009 Elfin T5 264 hp (197 kW) @ 5300 rpm 259 ft·lb (351 N·m) @ 2000 rpm
2012 Fisker Karma 260 hp (190 kW) @ 5300 rpm 260 ft·lb (353 N·m) @ 2000 rpm
Thanks to Wikipedia for this info!