Twin turbo R5P7

Forced Induction Mopar

  1. slowfab

    slowfab Member

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    Here is my project. Not a A body but still a mopar. It is a 70 challenger with a R5P7 that I am installing a pair of NRE mirror image turbos. Since this is a turbo section I will keep it to the engine/ turbo build.
     
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    • slowfab

      slowfab Member

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      The engine started as a truck series power plant. I changed the pistons over to a turbo friendly ring height, ring thickness and compression spec. Bullet cams re-ground to be a little more turbo friendly.

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      • slowfab

        slowfab Member

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        Updated the intake with bungs to run a Holley EFI system. Using a 102mm TB and 160lb inj.

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        • slowfab

          slowfab Member

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          Then the fabrication of all the exhaust to the turbos. This is so time consuming and still going on. This was the manifolds:

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          • slowfab

            slowfab Member

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            Got the hot side built to the turbos and the outlet side done. Working on tying in the wastegates.

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            • Evan Dutch

              Evan Dutch Well-Known Member

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              Badass man, keep us updated.
               
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              • 345man2

                345man2 Well-Known Member

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                Awesome keep posted with et or dyno numbers
                 
              • TT5.9mag

                TT5.9mag Two atmospheres are better than one

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                Hell yea I’m in for this ride. Nice fab work so far.
                 
              • 408 swinger

                408 swinger FABO Gold Member FABO Gold Member

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                These engines sound so bad ass all wound up.
                 
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                • Matts440

                  Matts440 Well-Known Member

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                  Bad ass, I was just talking about this and how awesome it would be of a build, put a 6 speed behind it let her rip, hunts some exotics on the straight a ways.
                   
                • YY1

                  YY1 Well-Known Member

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                  Impressive.
                   
                • 89on35s

                  89on35s Inferno Red Duster FABO Gold Member

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                  Awesome job! You are putting in lots of time!

                  Cley
                   
                • 67Dart273

                  67Dart273 FABO Gold Member FABO Gold Member

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                  I had to look this up. You probably have more in just the basic engine than I will in my whole car!!
                   
                • Evan Dutch

                  Evan Dutch Well-Known Member

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                  What made you decide to use this powerplant? Rather than a gen III hemi or other options
                   
                • slowfab

                  slowfab Member

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                  I had traded some stuff for this engine. So I thought it would make a fun project.
                   
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                  • 408 swinger

                    408 swinger FABO Gold Member FABO Gold Member

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                    That thing is gonna be bitchin'! I , for one, can't wait to hear it. Like on full power, at RPM. Holy shit that's going to be awesome!!!!
                     
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                    • mbaird

                      mbaird mbaird

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                      What town are you in ? Emmett ?
                       
                    • RustyRatRod

                      RustyRatRod I was born on a Monday. Not last Monday. FABO Gold Member

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                      So what kinda power numbers are you huntin for?

                      Badass build for sure!
                       
                    • slowfab

                      slowfab Member

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                      I am in Nampa.

                      Should be in the 1000-1200 with low boost and E85.
                      These things are very minimalist when it comes to over engineering the parts beyond what they were designed for. Do not really want to blow it up figuring out the limit.
                       
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                      • jbc426

                        jbc426 Well-Known Member

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                        Beautiful work! Have you thought about plumbing the air intake into the cowl to grab cooler air than is available where they currently draw air from?

                        I was visualizing a pair of insulated intake ducts plugging into your cowl with a large flat air filter or two mounted in the cowl with a quick release top access plate fabricated into the cowl opening. Done right, it would look cool and reduce air intake temperatures significantly, don't you think?

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                        • turbovan

                          turbovan Well-Known Member

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                          What are the specs on those turbos?
                           
                        • slowfab

                          slowfab Member

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                          They are 64mm units from Nelson Race Engines.

                          As for the cold air intake, I am just trying to not cut anything up on the car. Maybe some day a different owner would want it with a different setup. I figured if intake temps are high I can build a intake system from the rally hood scoops(opened up). On my Cuda the turbos are aimed the other way and there was no room for air cleaners so I flipped this set.
                           
                        • Matts440

                          Matts440 Well-Known Member

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                          I hear you on that one lol should come by again and hear mine, got it running finally. Sorry I forgot to have you come over to check everything over with me.
                           
                        • slowfab

                          slowfab Member

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                          Matt,
                          Yeah, I will need to come by one day and check it out.
                           
                        • Matts440

                          Matts440 Well-Known Member

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                          Awesome, and if you ever need any help with yours feel free to call and ask.
                           
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