6.4L engine questions? - Cherokee SRT8 Forum

» Auto Insurance

Go Back   Cherokee SRT8 Forum > WK2 Jeep Grand Cherokee SRT8 Performance Discussion > WK2 SRT8 Engine Performance/Superchargers/Turbos/Nitrous

WK2 SRT8 Engine Performance/Superchargers/Turbos/Nitrous Discuss engine performance enhancing modifications, superchargers & turbo applications specific to the WK2 SRT8 here.

CherokeeSRT8.com is the premier Jeep Cherokee Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools Display Modes
  #1  
Old 06-30-2012, 03:09 PM
meeper's Avatar
meeper meeper is offline
Elite Contributing Member
 
Join Date: Mar 2009
Location: West Grove, PA
Posts: 2,729
Thanks: 14
Thanked 225 Times in 195 Posts
6.4L engine questions?

anyone know if the 6.4L has any forged internals, crank rods or pistons?
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 11-21-2012, 05:00 AM
MTGOAT's Avatar
MTGOAT MTGOAT is online now
Senior Member
 
Join Date: Nov 2012
Posts: 164
Thanks: 0
Thanked 26 Times in 19 Posts
I believe i read the other day that the crank is forged but it did not mention anything about the rods... sorry
__________________
2013 SRT Vapor
2012 SVT Raptor
2006 GTO
-sold- 2010 Rubicon
Reply With Quote Quick reply to this message
  #3  
Old 11-21-2012, 07:32 AM
jim383's Avatar
jim383 jim383 is online now
Elite Contributing Member
 
Join Date: Aug 2007
Location: SO CA
Posts: 6,147
Thanks: 11
Thanked 323 Times in 277 Posts
Quote:
Originally Posted by MTGOAT View Post
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
__________________
2014 JEEP CHEROKEE TRAILHAWK

Last edited by jim383; 11-21-2012 at 10:21 AM.
Reply With Quote Quick reply to this message
  #4  
Old 11-21-2012, 08:01 AM
MTGOAT's Avatar
MTGOAT MTGOAT is online now
Senior Member
 
Join Date: Nov 2012
Posts: 164
Thanks: 0
Thanked 26 Times in 19 Posts
Quote:
Originally Posted by jim383 View Post
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!
Reply With Quote Quick reply to this message
  #5  
Old 11-21-2012, 08:03 AM
barish93 barish93 is offline
Senior Member
 
Join Date: Apr 2012
Location: New Jersey
Posts: 448
Thanks: 4
Thanked 20 Times in 18 Posts
Quote:
Originally Posted by MTGOAT View Post
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.


Sent from my iPhone using AutoGuide.com App
Reply With Quote Quick reply to this message
  #6  
Old 11-21-2012, 08:09 AM
DemonPerformance's Avatar
DemonPerformance DemonPerformance is offline
Supporting Vendor
 
Join Date: Dec 2011
Location: Coastal Carolina
Posts: 5,183
Thanks: 1,206
Thanked 1,475 Times in 938 Posts
Quote:
Originally Posted by jim383 View Post
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...
__________________
Skip » Demon Performance
Sales@DemonPerformance.com
1-888-312-3666
I wonder if they have Outback Steakhouses in the Outback?


2012-2014 Demon Performance Procharger Kits on sale now!!
Reply With Quote Quick reply to this message
  #7  
Old 11-21-2012, 08:10 AM
MTGOAT's Avatar
MTGOAT MTGOAT is online now
Senior Member
 
Join Date: Nov 2012
Posts: 164
Thanks: 0
Thanked 26 Times in 19 Posts
Quote:
Originally Posted by barish93 View Post
I just looked on like and it says that the 392 does have a 10.9:1 compression ratio.


Sent from my iPhone using AutoGuide.com App
interesting... and ridiculous!
Reply With Quote Quick reply to this message
  #8  
Old 11-21-2012, 08:24 AM
Untouchable's Avatar
Untouchable Untouchable is online now
Premium Member
Premium Member
 
Join Date: May 2006
Posts: 1,941
Thanks: 29
Thanked 482 Times in 286 Posts
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"


Sent from my iPhone using AutoGuide.com Free App
__________________

9.67@143.2

Reply With Quote Quick reply to this message
  #9  
Old 11-21-2012, 08:30 AM
DemonPerformance's Avatar
DemonPerformance DemonPerformance is offline
Supporting Vendor
 
Join Date: Dec 2011
Location: Coastal Carolina
Posts: 5,183
Thanks: 1,206
Thanked 1,475 Times in 938 Posts
You and me both! That's what all the Boss owners are doing haha, factory forged beasts ready for 20 psi out the box!
Reply With Quote Quick reply to this message
  #10  
Old 11-21-2012, 10:23 AM
jim383's Avatar
jim383 jim383 is online now
Elite Contributing Member
 
Join Date: Aug 2007
Location: SO CA
Posts: 6,147
Thanks: 11
Thanked 323 Times in 277 Posts
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.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Cherokee SRT8 Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Engine Coolant spraying in engine bay Nifo WK1 Troubleshooting / Problems Discussion / Dealer Service 10 02-26-2011 07:18 PM
Mod questions? nickbegonja55 WK1 Intake/ Exhaust Discussion 10 03-10-2010 10:34 AM
Newbie here, misc questions, engine temp prob? sean9 WK1 Troubleshooting / Problems Discussion / Dealer Service 10 10-14-2009 10:47 PM
2 more Questions... hot rod jeep WK1 Troubleshooting / Problems Discussion / Dealer Service 0 12-23-2008 11:27 AM
A Few Questions dalla1 WK1 SRT8 General Discussion 4 02-22-2007 05:29 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -6. The time now is 08:35 AM.



Powered by vBulletin®. Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
© AutoGuide