First test fit 5.7 truck engine

New Hemi Engine Swaps

  1. Edsrt

    Edsrt Well-Known Member

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    With social distancing ,no work and tracks closed I figured that now is the time to pull the 340 out of my Duster start installing my 2012 Ram 5.7 . Was hoping I would be able to use the Ram intake but after setting the motor in and squaring it up I set the intake on and found a bit of a clearance issue. I was hoping not to have spend 700 to 1000 plus for an intake . Also the active intake actuator hits the firewall. I do have an old fiberglass hood I could cut up for clearance and make a new scoop or cowl. If I could get that too work then I wouldn't have an issue cutting a pocket for the active intake actuator. Any suggestions would be helpful. 20200408_122813.jpg 20200408_122757.jpg 20200408_122834.jpg 20200408_122723.jpg
     
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    • jonnyrose

      jonnyrose Well-Known Member

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      Can you snap a photo of where it hits the firewall
       
    • Edsrt

      Edsrt Well-Known Member

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      In the picture I have the actuator off so the manifold will sit on the motor. I will reinstall tomorrow and take a pic.
       
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      • Yunick13

        Yunick13 Well-Known Member

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        I'd ditch the truck intake and belt assembly, and install one from a Charger/ Challenger/ 300
         
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        • 408 swinger

          408 swinger FABO Gold Member FABO Gold Member

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          Yunick is correct. It would be awesome to be able to keep the the Variable Runner. The truck intake is taller than the car. By switching to the car stuff, you'd be eliminating a bunch of work right off the bat.
           
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          • 1973Barracuda

            1973Barracuda Well-Known Member

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            PM sent
             
          • Kiddart1

            Kiddart1 Well-Known Member

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            I have a car intake if you want to buy it. I think I have two one was off a durango and the throttle body comes out the front and one from a chrysler 300 with the throttle body off the front. I will see cheap
             
          • Edsrt

            Edsrt Well-Known Member

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            Looks like it only needs an inch 20200409_114609.jpg
             
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            • jonnyrose

              jonnyrose Well-Known Member

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              I see what you mean,even if you notch the firewall,wiper arms might not clear under dash
               
            • 69Dartguy

              69Dartguy Well-Known Member

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              Modern Muscle sells a block off plate for a 6.4 engine.Maybe they have one for a 5.7 or maybe they are the same.Worth a call.I found this after I modified my firewall

              B3524FFC-D0AC-4B14-B0B5-0D5DFAA22883.png
               
            • Edsrt

              Edsrt Well-Known Member

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              I just picked up a 6.4 truck intake that has the actuator in the front and uses short linkages to operate. I may be able to use this to remotely operate valve 20200409_114338.jpg 20200409_114338.jpg
               
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              • CichliDart

                CichliDart Well, where is it now?

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                What year is the 6.4 intake manifold? I think I will have the same issue you have. Mine is a 2014 5.7 truck engine with what look like the same truck intake as your 2012 manifold.

                Thanks,
                Mike
                 
              • Edsrt

                Edsrt Well-Known Member

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                I think it is a 18 or 19 . The manifold is an inch taller than the 5.7 truck manifold and the throttle body swings to the passenger side of the engine
                 
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                • CichliDart

                  CichliDart Well, where is it now?

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                  Thank you!
                  My car is a 71 Swinger and I have a 5.7 to put in it. When I saw your post and pictures I knew I would have the same problem.

                  I was up late looking around and found 5.7 and 6.4 Challenger intakes intakes on Rockauto and saw that they were VVT. A bit expensive for the 6.4 version. While searching I found two different people that had videos on retrofitting a 6.4 VVT intake onto a 5.7. They were wiring and soldering and using an MSD box to actuate the short runner longer runner function. I was not able to figure out if this was used on non VVT enginess.

                  My plan of the week is to use a Mopar wiring harness. I have been told it should work with the VVT function on my 5.7 and now I am hoping it can be used on a challenger 6.4 VVT intake. If not as long as it works on a 5.7 Challenger VVT intake I will be happy.

                  Thanks,

                  Mike aka CichliDart
                   
                • CichliDart

                  CichliDart Well, where is it now?

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                  Kiddart1,
                  Can you tell if these would have the same firewall interference problems and are these VVT manifolds?

                  Thank you.

                  Mike aka Cichlidart
                   
                • 19DART66

                  19DART66 Well-Known Member

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                  All 5.7 from 09 to present are designated Eagle engines and 6.4 are Apache in cars and Jeeps and BGE(or big gas engines) in trucks are VVT engines. The heads on these engines along with the 6.1SRT all have ruffly the same intake ports and the intake manifolds will all bolt up. The 03 to 08 5.7 heads have a different intake port, plus the early 5.7 blocks have a wider peak at the front of the block so the Eagle, Apache, and BGE manifolds do not fit without spacers and/or slight modification. I am not sure but I think the 6.1 block has the same wide peak as the early 5.7 blocks so there could be interference with these too with the later 5.7, 6.4 intakes. Only the 5.7 Eagle truck engine and both 6.4 engines have the SRV (short runner valves) in them. The 5.7 Eagle car and Jeep engines with the throttle body bolted straight out the front do not have SRV valves. Both 6.4 intakes are a torque and horse power up grade on the 5.7 Eagle, especially when combined with a performance cam and long tube headers. Hope this helps.
                  P.S. the SRV valves in these intakes are computer controlled to switch from long runner to short runner at around 4800 rpm's, or you can use a MSD 8969 rpm window switch to activate it at any rpm you like.
                   
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                  • CichliDart

                    CichliDart Well, where is it now?

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                    Kiddart1,

                    Thanks for the crash course on Engines and intake manifolds. This will help a lot in my project.

                    My engine is a 2014 truck engine with the awkward throttle body pointing straight up. I need to dig my engine out of garage storage and take a long look at that intake. I am sure someone would have hacked the intake and made it work by now if it was at all possible. Meantime I will keep looking for the intake that will work for me.
                    Thanks for the help.

                    Mike
                    CichliDart.
                     
                  • TheGreatGazoo

                    TheGreatGazoo Member

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                    I ran into the same problem you in right now but with my 69 roadrunner
                    I wound up converting my 2016 truck 5.7 to a car intake. I based my replacement parts off a 2016 Chrysler 300. What I had to get was intake, timing cover, water pump, heater core tubes, belt, vibration damper, alternator and a/c compressor. Parts I was able to use from the truck motor were throttle body, belt tensioner, fuel injectors, fuel rail. Hope this helps you a little.
                     
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                    • Edsrt

                      Edsrt Well-Known Member

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                      I was looking into possibly modifying the 5.7 intake by pie cutting under throttle body to tilt it down. I have been researching plastic welding. I did find videos of people patching holes in LS manifold. I really don't want to change the whole front of the motor if I don't have to.
                       
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                      • 408 swinger

                        408 swinger FABO Gold Member FABO Gold Member

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                        I was staring at one of the 5.7s I have around. The alternator is offset enough, I wonder if just installing the car intake would work?
                         
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                        • Edsrt

                          Edsrt Well-Known Member

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                          I was wondering the same thing . So I borrowed the intake from my wife's 15 5.7. Grand Cherokee to see how it fit. As you can see the throttle body hits the alternator bracket . I forgot to try to reclock the throttle to see if it would clear but I did not want to have my wife's jeep apart for to long. 20200416_111335.jpg

                          20200416_111321.jpg

                          20200416_111048.jpg
                           
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                          • 408 swinger

                            408 swinger FABO Gold Member FABO Gold Member

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                            Perfect. Now we know!
                             
                          • CichliDart

                            CichliDart Well, where is it now?

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                            So close!
                            Intake manifold spacer?

                            Just spit balling.

                            Mike
                             
                          • CichliDart

                            CichliDart Well, where is it now?

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                            Edsrt.
                            I just found same topic earlier thread here on FABO.

                            "Yeah it makes the runner longer, but in my case, I didn't want to mill down the timing cover so the car intake would clear the timing cover, hence the spacers."

                            You can still see the pictures if you click on them.

                            Intake manifold spacers



                            Mike
                            aka CichliDart
                             
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