Results 1 to 7 of 7

5.7, 6.1, 6.4 Hemi interchange selection guide


-
  1. #1
    New Member
    Join Date
    Aug 2011
    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default 5.7, 6.1, 6.4 Hemi interchange selection guide

    This is an answer to FAQs that will hopefully be a valuable resource for your use. Thanks Plum Floored Creations
    5.7 – 6.4 Reference Guide (For factory produced parts)
    Short Blocks
    2003-2008 5.7
    All 5.7 03-to 08 5.7 short blocks interchange between car and truck engines. The difference between these is all car LX Charger, 300c, Magnums, Grand Cherokee, Commander, since 2005 are MDS equipped with the solenoids and lifters. In 2007 the Dodge Ram & Durango also benefited from the addition of MDS. With the exception of a few minor sensor changes these short blocks are identical. These were rated at 340 345 an 350 hp
    2009- 2012 5.7 EAGLE
    These are an excellent engine and have received the benefit of VVT variable valve timing. The short block is unique and will not interchange with earlier engines. The short block is the same regardless of application. These are rated at 372 car and Jeep, and 390 in the Ram. These may not be the best option for retro fits, as the MDS controller for carbureted conversion will not work with this engine, and there are limited standalone options that support the vvt. Note: 2009-2012 5.7 with the 6spd manual do not have MDS
    2005-2010 6.1
    This is a unique casting from the 5.7, and is an excellent performance piece. I tell people to think 318 vs 340 as most the parts will physically bolt on between the two, but car must be exercised to insure proper results. The short block is identical between car SRT-8s and the Jeep regardless of year or make. These were rated at 420 and 425 Horsepower. These engines do not have MDS
    2011-2012 6.4 APACHE
    This is a beast and has received the benefit of VVT variable valve timing. The short block is unique and will not interchange with earlier engines. The short block is the same regardless of application. These are rated at 465 and 470 horsepower. These may not be the best option for retro fits, as the MDS controller for carbureted conversion will not work with this engine, and there are limited standalone options that support the vvt. Note: 2011-2012 with the 6spd manual do not have MDS
    Oil Pans
    All HEMI LX RWD cars from 2005-2012 regardless of displacement utilize a front sump aluminum oil pan.
    All 2wd Dodge Rams 2003-2012 utilize a stamped steel rear sump pan (clears alterkation nicely)
    Jeep utilize a unique cast aluminum rear sump oil pan
    Front covers/Water pumps/ accessory drives
    There are 4 different style of front covers, but they are divided by
    03-08 5.7 Dodge Ram 5.7 only
    all DR engines use a 7 rib front accessory drive and the front cover, water pump and accessories will not interchange. This setup mounts the accessories up high in front of the intake prohibiting the use or certain intake manifolds.
    05-08 LX Car/and Jeep front covers 5.7 and 6.1
    All these front covers will interchange, the only difference is the alternator and power steering pump.
    These are all 6 rib units. The car power steering uses a remote reservoir and mounts to the head the same as the Jeep unit, however the jeep unit has an attached reservoir. The LX alternator bolts in from the side utilizing 3 bolts were as the jeep alternator fit a little tighter to the engine. An excellent option for retro fits with power steering is to use the power steering pump from a jeep, as it keeps it clean.
    09-012 Dodge Ram 5.7
    With the introduction of the eagle engine the front cover was redesigned for the vvt and new block. These will not interchange with earlier Dodge Rams, and are also a 7 rub setup. Mounting is similar to the early engine with the AC compressor and alternator up high.
    09-2012 5.7 Eagle and 2011-2012 6.4 Apache
    These engines share the front cover, but will not interchange with earlier models. The alternator and power steering will fit earlier engines, but care should be taken to insure correct interchange as there are other concerns other than physical fitment.
    Cylinder heads
    All HEMI heads have the same bolt pattern for intake and exhaust
    2003-2008 5.7
    Regardless of application these are all the same general casting with some very minor differences. Early 03 and 04 engines may not have the EGR provision in the passenger cylinder head. They are all cast aluminum and feature 2.00 inch intake and 1.55 exhaust valves. Stock compression ratio is 9.6. The intake port and is exhaust port is unique to this series. The intake is rectangular, and the exhaust is square
    2005-2010 6.1
    Regardless of application these are all the same general casting. The valves are 2.08 and 1.60 from the factory. They are equipped with a good valve spring. The intake utilizes a square port, and the exhaust a D port. This design was used on all later Hemi 5.7 Eagles and 6.4 Apaches. This head is still considered an open chamber head. Compression ratio is 10.3
    2009-2012 5.7 EAGLE
    Regardless of application these are all the same general casting. The intake utilizes a square port, and the exhaust a D port (same as 6.1). This head is considered a closed chamber head. Compression ratio is 10.3
    2011-2012 6.4 Apache
    Regardless of application these are all the same general casting. There is a difference in the valve spring between manual and automatic applications. The intake utilizes a square port, and the exhaust a D port (same as 6.1). This head has larger valves and better springs than the 6.1 and will support a larger cam out of the box. This head is considered a closed chamber head. Compression ratio is 10.9
    Intake Manifolds
    2003-2008 Dodge Ram/Durango 5.7
    These intake manifolds are composite and place the throttle body in the middle of the engine at a slight angle up from horizontal. These will only fit pre 09 5.7 heads correctly. MAP located at front of intake
    2005-2005 5.7 LX and Jeep
    This intake manifold is composter and places the throttle body above the front cover parallel to the ground. This will only fir pre 09 5.7 heads correctly MAP located at rear of intake
    2009-2012 5.7 Ram
    Intake manifold is composite, fits all square port heads and places the throttle body at the front of the intake at a 90 degree angle but may interfere with early blocks
    2009-2012 5.7 LX and Jeep
    Intake is composite and looks and performs as a plastic copy of the 6.1 intake manifold. Throttle body located at front of engine above timing cover horizontally. Fits all square port intake heads but may interfere with early blocks. Map located at rear of intake
    2005-2010 6.1
    All applications intake is aluminum and is designed for square port heads. Intake is a two piece design with a removalable plenum cover that allows porting. Throttle body located at front of engine above timing cover horizontally. Fits both early and late style blocks 5.7, 6.1, 6.4
    2011 6.4-2012 6.4
    All applications intake is composite, intake features a variable runner design that the computer determined rpm changes the runner length. Throttle body located at front of engine above timing cover horizontally but is angled towards the driver’s side of the car. This will fit all square port heads, but may interfere with the early style engine block without use of spacers.
    This is an incomplete list, but is designed to serve as a guide when determining which Hemi is the right one for you. We are hoping to update this with photos in the near future and will repost.
    Thanks
    [FONT=Calibri][SIZE=3]

    Last edited by ramenth; 03-09-2012 at 02:02 PM.

  2. #2
    Member bad440's Avatar
    Join Date
    Nov 2010
    Location
    Sudbury,ontario
    Posts
    48
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    This is really well researched and good info for parts swapping as well as building these engines. Nice work done here.

  3. #3
    Senior Member
    Join Date
    Dec 2008
    Location
    Panama
    Posts
    1,230
    Thanks
    3
    Thanked 46 Times in 45 Posts

    Default

    good info !!
    Can I copy this to another site ?

  4. #4
    New Member roadrunninMark's Avatar
    Join Date
    Apr 2011
    Posts
    22
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    great info. Plum, I thought I read somewhere that you can really bump up the compression on an early 6.1 by using the later 6.1 heads?

  5. #5
    New Member
    Join Date
    Mar 2012
    Posts
    15
    Thanks
    1
    Thanked 0 Times in 0 Posts

    Default

    Quote Originally Posted by roadrunninMark View Post
    great info. Plum, I thought I read somewhere that you can really bump up the compression on an early 6.1 by using the later 6.1 heads?
    I think you meant by putting the 5.7 heads on the 6.1 you would raise the comp, because the chamber on the 5.7 is smaller its like :65 cc and the 6.1 is like 77 cc or somewhere near those numbers. The 57 heads flow better stock than the 6.1 heads also.

  6. #6
    Member bad440's Avatar
    Join Date
    Nov 2010
    Location
    Sudbury,ontario
    Posts
    48
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    One thing not clear here is the valve sizing on the Eagle 5.7, same as 6.1 or different.

  7. #7
    New Member 5.7 hemi's Avatar
    Join Date
    Jun 2009
    Posts
    14
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Default

    By putting the 6.1 heads on a 5.7 you will raise the compression, not the other way around.

    Go check FABO, new hemi swaps, there is a butt load of info there.