Whos running a 5.9L Magnum ?

Magnum Engine Swaps

  1. Lelo Dart

    Lelo Dart *

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    Sounds like a bad deal in a A body.
     
  2. 67 gt

    67 gt A Wog boy who loves his Mopars ! FABO Gold Member

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    Would you want to check the dates on these posts it started in 2011 ... man some posts are coming back from years ago !!!
     
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    • YY1

      YY1 Well-Known Member

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      As I understand it, magnum manifolds are cast different for different applications.

      Jeep/Ram/Dakota, etc.

      Even some differences year to year.
       
    • bozvaliant

      bozvaliant Well-Known Member

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      I have a stock 5.9 short block with the ported "R/T" heads from Mopar Performance. I'm running the roller cam from the 380HP motors with crosswind dual plane and FAST EZEFI 2 TBI. The car runs great considering I'm only running with 2.94 gears and a 3 speed.
       
    • rumblefish360

      rumblefish360 so close yet so far away

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      If your running that bad boy on stock diameter tires, I agree and that FI helps a good bit.

      I’d like to hear you say one day that you installed 3.90-4.10 gears with a decent tire size and let her rip!
       
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      • bozvaliant

        bozvaliant Well-Known Member

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        3.90-4.10 are in the future along with an overdrive. I just can't justify doing it soon. My daughter is heading off to college. I have to pay for that first. I also have to get rid of the 8 1/4 rear end. I'll probably end up with an 8.8 out of the wrecking yard. 8 3/4s are just to expensive.
         
      • rapidtransitric

        rapidtransitric LX/LC platform a body swap pioneer

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        Nothing wrong with an 8.25 rear end
         
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        • 70aarcuda

          70aarcuda Master Hoader of SBM FABO Gold Member

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          bought a 1999 5.9 engine...had an oil leaking plenum was removed from Durango...140k miles...bores look great...going to hone and put new bearing and rings in it...get a set of heads done for it and it is going into a 88 Dodge d250...hope to have short block back together by next weekend..probably going to have a stock hydraulic cam.

          used a couple can of oven cleaner to clean pistons....man that stuff does a job...and then cleaned to block up too......
           
          Last edited: Mar 31, 2018
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          • bozvaliant

            bozvaliant Well-Known Member

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            I know, but an 8.8 is pretty strong for not so much money.
             
          • rumblefish360

            rumblefish360 so close yet so far away

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            I’ll agree the Ford 8.8 is stronger but you do a disservice to the 8-1/4.

            Let me ask, how much power are you making?
             
          • 273

            273 Well-Known Member

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            My car came with the 380hp create

            Screenshot_20171212-084647.png

            Works pretty good a little soft under 2000 rpm. The gears is my main problem 2.94 with a 2800 stall. Plan on swapping to an airgap and Rhoads roller lifters to help bottom end. Plus add 3.55 - 4.36 not sure yet. See how the intake and lifters help first.
             
            Last edited: Apr 1, 2018
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            • rumblefish360

              rumblefish360 so close yet so far away

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              Do the gears and converter first. You’ll be much happier. Intake later, from r the icing on top .
               
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              • RBConvert

                RBConvert Well-Known Member

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                Yep. I have the 360/380 hp motor backed by a Tremec 5 spd. Swapped the 3.55's for 4.10's, really woke her up.
                 
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                • bozvaliant

                  bozvaliant Well-Known Member

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                  Hey, I'm a Mopar guy. I really like the 8 1/4, but for the price to turn it into a sure grip, install gears and new brakes, I could have a stronger rear end for the same or less money. My car may be a cruiser right now, but I plan on doing some other things down the road. As far as hp goes, I really don't know. The combo is very similar to the HP380 but my heads are ported.
                   
                • rumblefish360

                  rumblefish360 so close yet so far away

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                  Oh! Leg legged to a twin grip, gotcha, no brainer there......

                  What does the Ford rear cost?
                   
                • mopar65

                  mopar65 Well-Known Member

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                  I will be useing a magnum 5.9 in my 91 Dakota pro Junk yard truck. That is if I ever get it all put back togeather. Lol working outside with no shop sucks. Lol my truck is pretty much a striped down frame with a cab mounted on it still. I to will be installing a Ford 8.8 in my truck. Mines coming from a Exploder and they are pretty much a bolt in deal. Just have to add spring perches and shock mounts.
                  Rusty around here you can get complete rearend for 150-200
                   
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                  • 273

                    273 Well-Known Member

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                    Thats the plan now, I cancel the intake and lifter order, gonna grab a set of 4.30 gears.
                    Bought an Avenger RT to handle daily driving duties so the Valiant is free to be more street strip machine :)
                     
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                    • Abodybomber

                      Abodybomber Breaking street machines , since 1983.....:) Legendary Member

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                      Sooo.. leaving the cam / head / intake ? alone ? And converter? Semi innocent souls ( like myself ) would like to know.
                       
                    • 273

                      273 Well-Known Member

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                      For now, maybe over the winter port the heads/intake and add 1.7 roller rockers.
                      Don't see no point in taming the cam anymore and with 4.30 gears traction will be limited so probably won't need the torque of the airgap.
                       
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                      • Abodybomber

                        Abodybomber Breaking street machines , since 1983.....:) Legendary Member

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                        Agreement , it's gonna hammer. Trust me ,how I know...
                         
                      • rumblefish360

                        rumblefish360 so close yet so far away

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                        Just like a race car.
                        Adding a higher stall converter for launch and into a higher rpm power band with a effect similar but not as hard as a race car.
                        Same as the gears.

                        But the converter and gears will match the future cam.
                         
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                        • Abodybomber

                          Abodybomber Breaking street machines , since 1983.....:) Legendary Member

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                          They do make good midrange torque.
                           
                        • 273

                          273 Well-Known Member

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                          Pretty awesome engine for a cam intake on a truck engine, with the 2.94 I need run in 2nd trough town so it dont lug , or do 40 mph in 1st then hammer it to feel its power. Ive been talk into grabbing a set of 4.56 :)
                           
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                          • moparmike98

                            moparmike98 Well-Known Member

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                            I run the 380 crate with tti headers, Bigs carb, M1 single plane, 4 speed, and 3.91s in my duster. Going from 3.23s and a demon carb with non functional vac. secondaries to the 3.91s and Bigs carb with mech. secondaries was a huge change. It's a blast to drive but I might drop some IMM EQ heads on it in the near future.
                             
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                            • mopar65

                              mopar65 Well-Known Member

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                              Well I finally got to move my Dakota into my girlfriends shop. Yea no more working on it only on nice days. Lol I finally got my DP carburetor installed last night. Getting ready to start working on getting the 8.8 built and installed. I am going to I stall 4.30 gears and a full spool. I am hoping my Dakota will run in the 10.80 in the 1/4 when I am done. After I get it running I am going to start saving money for a stroke engine for next year or a gen III Hemi engine. Lol

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