Ram 2500 with 6.4 Hemi
I've ben keeping up on the posts and researching the new 6.4. I just sold my Lance camper and will keep my 21' Toy hauler. My 03 DRW with the Cummins pulls it well, but it's really more than I need a...
Forum Discussion
These are two gasoline engines I'm considering in a class 5 truck:
The 2014 Ram Chassis Cab 3500, 4500 and 5500 come standard with the new 6.4-HEMI® V-8 gasoline engine — the first implementation of a gasoline engine in the Ram 4500 and 5500 Chassis Cab models. Active dual-runner-length intake manifold optimized specifically for the Ram Chassis Cab lineup. The result is improved low-end torque without sacrificing high-end power. Cooled exhaust-gas recirculation (EGR) delivers greater efficiency, reduced pumping losses and lower emissions. Pumping losses are further reduced by variable-valve timing (VVT), which also lowers emissions. It is available with an idle shutdown timer and the 4500 and 5500 models come standard with the Aisin AS66RC six-speed automatic transmission. The new Aisin allows for optional 250 lb.ft. of torque, left- or right-side PTO. Efficiency is improved with Fuel Saver cylinder deactivation operation while in PTO mode.
6.4-liter V-8 with 370 horsepower (276 kW) at 4,600 rpm (410 horsepower (306 kW) at 5,600 rpm under 10,000-lb. GVWR) and 429 lb.-ft. of torque (582 N•m) at 4,000 rpm, featuring variable-valve timing (VVT) and Fuel Saver cylinder deactivation.
The 6.8 L (6760 cc, 413 CID) SOHC V10 is another variation of the Modular family created for use in large trucks. Bore size is 90.2 mm (3.552 in) and stroke is 105.8 mm (4.165 in), identical to the 5.4 L V8. The 6.8 L uses a split-pin crank with 72° firing intervals and a balance shaft to quell vibrations inherent to a 90° bank angle V10 engine. The engine's firing order is 1-6-5-10-2-7-3-8-4-9. The 3-valve non-VCT version was built in 2005 at Ford's Windsor, Ontario LVL engine line, but moved production to the larger Windsor Engine Plant in 2009.
Specifications:
Type - 10-cylinder, 90° V, Single Overhead Cam, 30-valve
Displacement - 6.8L (415 CID)
Horsepower (SAE net) - 362 hp (270 kW) @ 4750 rpm
Torque - 457 lb.-ft. (620 N·m) @ 3250 rpm
Compression Ratio - 9.2:1
Bore and Stroke (in.) - 3.55 x 4.16
Engine Block Material - Cast Iron
Cylinder Head Material - Aluminum
Main Bearings - 6
Valve Lifters - Hydraulic Lash Adjuster with Roller Follower
Fuel Delivery - Sequential Multi-port Electronic Fuel Injection
Fuel (minimum) - 87-octane Regular Unleaded
