Has anyone tried to transplant &/or tune and LF3 or 4? It's the twin turbo version of the LFX and comes in the XTS, CTS, & ATS-V.
I have a home for an LFX, just haven't found the right donor car yet and suddenly I have a project that could benefit from the LF3 or 4.
In case you haven't heard about them here's what Wiki says about them:
LF3
The 3.6 L twin-turbocharged version for the 2014 Cadillac CTS and 2014 Cadillac XTS has been announced at the 2013 NYAS.[15]
The engine is rated at 420 hp (313 kW) of power @ 5750 rpm and 430 lb⋅ft (583 N⋅m) of torque @ 3500-4500 rpm (with 90% of torque being available at 2500-5500 rpm) and helps the CTS achieve 0-60 mph time of 4.6 seconds with an 8-speed automatic transmission.
In essence, the twin-turbo 3.6L V6 is the force-inducted variant of the popular LFX V6 currently found in the Cadillac ATS, XTS, and SRX, among many other GM models, with several important upgrades, including:
All-new cylinder block casting
All-new cylinder head castings
Strengthened connecting rods
Forged steel crankshaft
Continuously variable valve timing
Large 38.3 mm intake valves and 30.6 mm sodium-filled exhaust valves
Machined, domed aluminum pistons with top steel ring carrier for greater strength
10.2:1 compression ratio
Patented, integrated charge air cooler system with low-volume air ducts
Two turbochargers produce more than 12 pounds of boost (80 kPa)
Vacuum-actuated wastegates with electronic control valves
All-new direct injection fuel system
Tuned air inlet and outlet resonators, aluminum cam covers and other features that contribute to exceptional quietness and smoothness
Applications:
Year(s) Model Power Torque Dyno chart
2014?present Cadillac XTS 410 hp (306 kW) @ 6000 rpm 369 lb⋅ft (500 N⋅m) @ 1900-5600 rpm link
2014?present Cadillac CTS 420 hp (313 kW) @ 5750 rpm 430 lb⋅ft (583 N⋅m) @ 3500-4500 rpm link
LF4
The LF4 is a higher-performance variant of the LF3 for use in the Cadillac ATS-V. Changes to the LF3 include:
Turbochargers with low-inertia titanium-aluminide turbines and vacuum-actuated wastegates for more responsive torque production
Compressors matched for peak efficiency at peak power levels, for optimal track performance
Patent-pending low-volume charge-cooling system that optimizes packaging efficiency and maximizes boost pressure
Lightweight titanium connecting rods that reduce inertia of the rotating assembly, complementing the quick-spooling turbochargers[16]
Peak boost increased to 18 PSI (from 12 PSI)
Higher-flow fuel injectors
Oil pan baffling for better oil flow at high cornering speeds[17]
Applications:
Year(s) Model Power Torque Dyno chart
2016?present Cadillac ATS-V, Cadillac ATS-V Coupe 464 hp (346 kW) @ 5850 RPM 445 lb⋅ft (603 N⋅m) @ 3500 RPM 2016 link
Also it looks as if the LF4 is the block to have if you are going to be racing your LFX