2009 Revisions
Chrysler has made various revisions to the 5.7 L for the 2009 model year. The first for all applications is what Chrysler calls Variable Camshaft Timing or VCT. VCT (which is essentially variable valve timing) uses an oil control valve which controls oil flow to a unique camshaft sprocket which contains a phasing device, which depending on the operation of the oil control valve either advances or ******* camshaft timing.
Cylinder heads have been revised to increase flow. Though the intake manifold has also been changed on all applications, it is however model specific. Dodge Ram, non-Hybrid Electric Vehicle (HEV) Chrysler Aspens, and non-HEV Dodge Durango utilize an active intake manifold with a short runner valve to optimize torque and horsepower. At lower engine RPM the valve is closed, resulting in improved low-end torque from the longer runners. At higher engine RPM the valve is opened, diverting the incoming air into the center of the manifold. The shorter runners results in improved horsepower. Passenger cars, Jeep vehicles, and HEV Chrysler Aspen & HEV Dodge Durango do not use this manifold, these vehicles utilize a passive intake manifold, which does not have a short runner valve.
Six-speed manual transmission and all Heavy Duty truck applications[album][/album] will differ by not having the Multiple Displacement System (MDS). The new version of the 5.7L has five different camshaft profiles. All will have VCT.
Active intake with MDS
Active intake without MDS
Passive intake with MDS
Passive intake without MDS
HEV Application (modified version of passive intake with MDS)
2011+ Power Numbers [1][2][3]
300C: 363 hp (271 kW), 394 lb·ft (534 N·m)
Charger R/T: 370 hp (276 kW), 395 lb·ft (536 N·m)
Challenger R/T 5 Speed Automatic: 372 hp (277 kW), 400 lb·ft (542 N·m)
Challenger R/T 6 Speed Manual: 375 hp (280 kW), 410 lb·ft (556 N·m)
Ram 1500 Truck: 390 hp (291 kW), 407 lb·ft (552 N·m)
2013+ Ram 1500 Truck: 395 hp (295 kW), 407 lb·ft (552 N·m)
Jeep Grand Cherokee and Jeep Commander: 360 hp (268 kW), 390 lb·ft (529 N·m)
Dodge Durango: 360 hp (268 kW), 390 lb·ft (529 N·m)
https://en.m.wikipedia.org/wiki/Chrysler_Hemi_engine