Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > 3rd Gen Ram Tech
Sign in using an external account
Register Forgot Password?


3rd Gen Ram Tech 2002-2008 Rams: This section is for TECHNICAL discussions only, that involve the 2002 through 2008 Rams Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

5.7 to 6.4 hemi swap

Reply
 
 
 
 
Thread Tools Search this Thread
  #1  
Old 02-28-2014, 09:23 AM
johnpa johnpa is offline
Registered User
Garage is empty, add now
 
Join Date: Feb 2014
Posts: 6
Default 5.7 to 6.4 hemi swap

Is it possible to swap my 5.7 for a 6.4. I am sure my axles and tranny can handle it. Is it a major fabrication job or is the 6.4 block similar to the 5.7.

any thoughts
This ad is not displayed to registered and logged-in members.
Register your free account today and become a member on Dodge Forums!
Reply With Quote
  #2  
Old 02-28-2014, 10:43 AM
brandt.reuss's Avatar
brandt.reuss brandt.reuss is offline
Registered User
Garage is empty, add now
 
Join Date: Jun 2013
Vehicle: 2004 Dodge Ram 1400 4x4 SLT
Location: Alabama
Posts: 10
Default

things I can think of that would cause issues: weight of new engine ( front ifs torsion bars may need to be beefed up to handle weight. if there was a conversion kit to coil over that would be awesome ), motor mounts ( if they aren't the same then fabrication will be required, if they are the same they still might need to be beefed up), wiring harness and other similar interfaces are more of an obstacle than issue, if you decide to do it I would get a fully dressed engine but you also gotta consider stuff like radiators and will you need a new computer.

it would help to know what year and model vehicle you currently have. I know mopar has sold factory crate hemi's fully dressed in multiple sizes. if you remember the gen 3 srt dodge pickup with the v10 viper engine. a buddy of mine bought a wrecked srt 10 and swapped the engine for his 5.7 and it was a plug and play, everything fit perfectly. only issue was transmission because the srt is standard tranny.
Reply With Quote
  #3  
Old 02-28-2014, 01:55 PM
HemiLonestar's Avatar
HemiLonestar HemiLonestar is offline
Champion
2003 Dodge Ram 1500
My Garage
 
Join Date: Nov 2005
Vehicle: 2003 Ram 1500 Lonestar Edition & 2006 Dodge Charger R/T
Location: MD
Posts: 2,825
Send a message via AIM to HemiLonestar Send a message via MSN to HemiLonestar Send a message via Yahoo to HemiLonestar
Default

Weight of the engine is almost exactly the same. There are other problems you'd run into. Are you looking at crate engine, one out of a new 2500 or out of an SRT?
__________________

2003 Ram 1500 QC Hemi Lonestar Edition "Big Red"
SRT-10 suspension
and rear, Superchips, AiRaid, Taylor shorties, McGaughy's shackles, Mopar Borla cat-back, SRT hood, TMR delete, Sonnax, Power Wire, Daytona lip, tow mirrors.
Reply With Quote
  #4  
Old 03-01-2014, 09:57 AM
johnpa johnpa is offline
Registered User
Garage is empty, add now
 
Join Date: Feb 2014
Posts: 6
Default

My dodge is a 2006 2500 heavy duty automatic 4x4.
Reply With Quote
  #5  
Old 03-01-2014, 10:21 AM
dirtydog's Avatar
dirtydog dirtydog is offline
Moderate User
2008 Dodge Ram 1500
 
Join Date: Oct 2008
Vehicle: 2008 Ram QC 4x4 BigHorn
Location: Albany, NY
Posts: 10,781
Send a message via Yahoo to dirtydog
Default

Yeah, pretty sure it's the same block, just with bigger sleeves.

Why 6.4L? Bigger isn't necessarily better ya know. It's definitely more expensive!
I would prefer a supercharged 5.7L or a supercharged 6.1L. It would just be cheaper in the end I would think and repairs would be as well.
I believe Arlington wants $18k for a 392 built block..lol

Is it just to say you have a 392? If it's the difference in power over a 6.1L, if you put a lower lift(towing) can in the 6.1L, you'll get much better results for a truck application. They need to rev too high to get their power.
__________________
Reply With Quote
  #6  
Old 03-01-2014, 01:31 PM
johnpa johnpa is offline
Registered User
Garage is empty, add now
 
Join Date: Feb 2014
Posts: 6
Default

I tow a 13000 pound trailer and wanted the extra power. Supercharging is a idea though
Reply With Quote
  #7  
Old 03-02-2014, 10:49 PM
HemiLonestar's Avatar
HemiLonestar HemiLonestar is offline
Champion
2003 Dodge Ram 1500
My Garage
 
Join Date: Nov 2005
Vehicle: 2003 Ram 1500 Lonestar Edition & 2006 Dodge Charger R/T
Location: MD
Posts: 2,825
Send a message via AIM to HemiLonestar Send a message via MSN to HemiLonestar Send a message via Yahoo to HemiLonestar
Default

Quote:
Originally Posted by johnpa View Post
My dodge is a 2006 2500 heavy duty automatic 4x4.
Wasn't asking about your truck, which engine are you looking at to put into it; the 6.4 out of a car or the 6.4 out of the new trucks?

Either way, you'd be better off stroking your 5.7 out to a 392. then you'd have all the torque you probably need and everything will still bolt up.
__________________

2003 Ram 1500 QC Hemi Lonestar Edition "Big Red"
SRT-10 suspension
and rear, Superchips, AiRaid, Taylor shorties, McGaughy's shackles, Mopar Borla cat-back, SRT hood, TMR delete, Sonnax, Power Wire, Daytona lip, tow mirrors.
Reply With Quote
Old 03-02-2014, 10:49 PM
 
 
 
Reply




Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

Join DodgeForum
Advertising

Featured Sponsors
Vendor Directory
Our Sponsors
All times are GMT -4. The time now is 12:32 PM.

Internet Brands, Inc.


Contact Details & Emails