6.4L engine questions?

[meeper]

anyone know if the 6.4L has any forged internals, crank rods or pistons?

[MTGOAT]

I believe i read the other day that the crank is forged but it did not mention anything about the rods... sorry

[jim383]

Originally Posted by MTGOAT

I believe i read the other day that the crank is forged but it did not mention anything about the rods... sorry

I found this hope it helps.

Specifications:
• Deep-Skirted Cast Iron Block with Cross-Bolted Mains
• CNC Ported Aluminum Twin-Plug Cylinder Heads
• Stainless Steel 2.100" Intake and 1.600" Exhaust Valves
• Ovate Wire (Beehive) Competition Valve Springs
• Viton Competition Valve Stem Seals
• 279°/285° (duration @ .006") Hydraulic Roller Camshaft with 0.584" Intake and 0.552” Exhaust Lift
• Forged Pistons (4.055" Bore)
• 10.9:1 Compression Ratio
• 4140 Forged Steel Crankshaft – 3.795" Stroke
• 4130 Forged Steel I-Beam Performance Connecting Rods – 6.200" Length
• Premium Tri-Metal Performance Engine Bearings
• Precision Balanced Rotating Assembly
• Distributorless Coil-On-Plug (COP) Ignition System

[MTGOAT]

Originally Posted by jim383

I found this hope it helps.

Specifications:
• Deep-Skirted Cast Iron Block with Cross-Bolted Mains
• CNC Ported Aluminum Twin-Plug Cylinder Heads
• Stainless Steel 2.100" Intake and 1.600" Exhaust Valves
• Ovate Wire (Beehive) Competition Valve Springs
• Viton Competition Valve Stem Seals
• 279°/285° (duration @ .006") Hydraulic Roller Camshaft with 0.584" Intake and 0.552” Exhaust Lift
• Forged Pistons (4.055" Bore)
• 10.3:1 Compression Ratio
• 4140 Forged Steel Crankshaft – 3.795" Stroke
• 4130 Forged Steel I-Beam Performance Connecting Rods – 6.200" Length
• Premium Tri-Metal Performance Engine Bearings
• Precision Balanced Rotating Assembly
• Distributorless Coil-On-Plug (COP) Ignition System

Nice!

I was listening to a review on the motor the other day as well and I could have sworn that the SRT tech said the 6.4L had a 10.9:1 compression 10.3:1 is still pretty stout to say the least. Great motor!

[barish93]

Originally Posted by MTGOAT

Nice!

I was listening to a review on the motor the other day as well and I could have sworn that the SRT tech said the 6.4L had a 10.9:1 compression 10.3:1 is still pretty stout to say the least. Great motor!

I just looked on like and it says that the 392 does have a 10.9:1 compression ratio.


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[DemonPerformance]

Originally Posted by jim383

I found this hope it helps.

Specifications:
• Deep-Skirted Cast Iron Block with Cross-Bolted Mains
• CNC Ported Aluminum Twin-Plug Cylinder Heads
• Stainless Steel 2.100" Intake and 1.600" Exhaust Valves
• Ovate Wire (Beehive) Competition Valve Springs
• Viton Competition Valve Stem Seals
• 279°/285° (duration @ .006") Hydraulic Roller Camshaft with 0.584" Intake and 0.552” Exhaust Lift
• Forged Pistons (4.055" Bore)
• 10.3:1 Compression Ratio
• 4140 Forged Steel Crankshaft – 3.795" Stroke
• 4130 Forged Steel I-Beam Performance Connecting Rods – 6.200" Length
• Premium Tri-Metal Performance Engine Bearings
• Precision Balanced Rotating Assembly
• Distributorless Coil-On-Plug (COP) Ignition System

Hey Jimbo, not sure that's the production model 6.4 motor being used today in the WK2 and the LX vehicles...that's the specs from one of the engines I have listed up for sale, the Mopar Performance Crate 392

http://www.cherokeesrt8.com/forums/s...ad.php?t=66637

I doubt that the Mopar Performance crate setup would be the same specs of the production model...

[MTGOAT]

Originally Posted by barish93

I just looked on like and it says that the 392 does have a 10.9:1 compression ratio.


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interesting... and ridiculous!

[Untouchable]

Lol skip
Yea those specs didn't make sense for the oem motor. If they did I'd be half way to the dealer with second stop being the "turbo guy"


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[DemonPerformance]

You and me both! That's what all the Boss owners are doing haha, factory forged beasts ready for 20 psi out the box!

[jim383]

It didnt say if it was a crate motor or production motor, and yes the compression is 10.9-1 from what i have seen.