[G. Craig]

Originally Posted by iceman

Are the internals forged in these engines?

Any guess as to what they will hold on a stock bottom end or where the weak points are that need to be built for near 800 rwhp?

Iceman to give you another example of the modifications needed to get the kind of power you are asking about. Hennessey Performance Engineering has performed the following to a 2008 Challenger they call the SRT700 Turbo. Of course the drive line will need to be modified to withstand that kind of power along with the suspension upgrades necessary to get all that power to the ground.

SRT700 Turbo - 426 CID Engine Upgrade

Power:

• 725 hp @ 5,200 rpm
• 750 lb-ft @ 4,000 rpm

Estimated Performance:

• 0 - 60 mph: 3.5 sec. *
• 1/4 mile: 11.3 sec. @ 126 mph *
• Top Speed: 190 mph

* with Drag Radial Tire Upgrade

Includes:

• 426 Cubic Inch Displacement Stroker Motor
• 9.0:1 Compression Forged Aluminum Pistons
• Forged Steel Connecting Rods
• 426 Stroker Crankshaft
• Balanced Rotating Assembly
• High Flow Cylinder Heads
• Polished Intake Manifold
• Single 67 mm Turbocharger
• Stainless Steel Turbo Y-Pipe
• Single 44 mm Wastegate
• Stainless Steel Dual 3 in. Exhaust System with Polished Stainless Steel Exhaust Tips
• Front Mounted Air-to-Air Intercooler
• 3.5 in. Polished Inlet Tube with Blow-Off Valve
• Upgraded Fuel Injectors
• Upgraded Engine Management System
• 180 degree thermostat upgrade
• All necessary gaskets and fluids
• Professional Installation
• Chassis Dyno Testing
• Road Testing (up to 100 miles)
• One year limited warranty