This is especially important at high-rpm where valves are opening and closing very quickly. Generally, more duration is better for top-end power while less duration helps low-end torque. Modest 5.7 HEMI camshaft upgrades usually go with a duration around 214/222. More aggressive cams will come in around 226/235.
Stepping up to a base R/T model brings the 5.7-liter Hemi V8 engine, upgraded sound system with Boston speakers, fog lights and rear spoiler. See Full Specs for All 2013 Dodge Challenger Power Steering Pump Bolts Torque Spec. 18 ft-lbs. A/C Compressor to Block Torque Spec. 15 ft-lbs. Ram 1500 5.7L engine bolt torque specs, common problems and repairs. Cylinder Head Torque specs, timing chain installation, manifolds torque specs, engine assembly. Along with a frugal and torque-rich diesel six-cylinder engine, the Ram enhances its standard V-6 and optional Hemi V-8 with hybrid systems. though the 5.7-liter Hemi V-8 can also be had Acceleration and Power. Under the hood, the 1500 boasts several powertrain options. The base ST comes standard with the base engine -- a 3.7-liter Magnum V6. However, three other engine choices are optional: a 4.7-liter Magnum V8, a Flexible Fuel Vehicle V8 or a 5.7-liter Hemi Multi Displacement V8.The 6.4L HEMI engine is an over-square engine with a 103.9 mm cylinder bore, 94.6 mm piston stroke, and 10.9 compression rating for most SRT vehicles. Oversquare engines mean that the cylinders have a greater bore than the stroke, making the bore/stroke ratio greater than 1. Resulting in higher RPM range – and more power, without overplaying
If you own a 5.7 Hemi engine, you may have experienced low oil pressure at idle. This is a common problem with these engines and can be caused by a variety of factors. The most common cause of low oil pressure at idle is an incorrect oil viscosity. The 5.7 Hemi requires an oil with a viscosity of 5W-20 or 5W-30.
