ATK 5.9 Magnum crate motor horse power

Mopar General Discussions

  1. dodge71demon

    dodge71demon Well-Known Member

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    Leaning towards replacing my weak LA 360 with a crate 5.9 magnum ATK list theirs at 320 HP
    but looks like they are using pretty much stock components - is that possible Looks like a pretty decent company anybody using this --Thanks
     
  2. diymirage

    diymirage HP@idle > hondaHP@redline

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    Do yourself a favor, get a hold of @Johnny Mac and see what he has to offer
     
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    • dodge71demon

      dodge71demon Well-Known Member

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      I believe he is with blueprint now and I don't think they do a magnum but I'll check
       
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      • diymirage

        diymirage HP@idle > hondaHP@redline

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        I thought they got magnums now, kinda hard to tell
        Half the engines on thier website have magnum valve covers, but they all say flat tappet

        I guess well see what he has to say for himself
         
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        • thesiren74

          thesiren74 Well-Known Member

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          Atk 408 my brother had ate the cam bearings quickly. And now it's on the floor with a busted ring land.
           
        • jeffnmo

          jeffnmo Just another Mopar Maniac

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          Isn't Johnny Mac going all magnums? I thought I read somewhere the LA blocks were getting hard to find in mass. Could be wrong. Look up his thread about the 465 horse magnum.

          Jeff
           
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          • dodge71demon

            dodge71demon Well-Known Member

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            sent him a message we'll see
             
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            • gzig5

              gzig5 Well-Known Member

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              • 67 gt

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

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                @Johnny Mac a Mopar brethren requires your assistance , yes they are using the mag roller engines .
                 
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                • mopowers

                  mopowers Well-Known Member

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                  I thought BP is only doing stroker magnums.
                   
                • Johnny Mac

                  Johnny Mac www.blueprintengines.com FABO Vendor

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                  Thanks for the callout fellas!!
                  Our new mopar offering is a magnum based 408. BPC4085 is the base PN. Roller cam, roller rocker, forged pistons. LA's are just about gone. Yes.

                  Our 408 uses a steel crank, being a stroker. To do a 5.9 cheaper, you'd basically have to reman a crank. And that's not something we do much of. So....if you're open to a 408, I will gladly work with you. If you are wanting a 5.9 for budgetary reasons, I fully understand, but as some pointed out above, that's about a stock rebuild with a cam.

                  I do not have any PM's that I see fyi.

                  Happy to help whenever!
                   
                • Johnny Mac

                  Johnny Mac www.blueprintengines.com FABO Vendor

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                • dodge71demon

                  dodge71demon Well-Known Member

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                  Wanting to be around the 375 HP range don't think my car would take any more - stroker ok but want the magnum set up with roller cam and straight down bolt intake (not LA style) looks like the ATK 320 HP is a stock motor just letting it breath better with carb and exhaust
                   
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                  • Johnny Mac

                    Johnny Mac www.blueprintengines.com FABO Vendor

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                  • dodge71demon

                    dodge71demon Well-Known Member

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                  • Johnny Mac

                    Johnny Mac www.blueprintengines.com FABO Vendor

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                    Correct. Roller cam and lifter adds cost to an engine we try to keep as a budget offering.
                     
                  • Caco2120

                    Caco2120 Well-Known Member

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                    BluePrint engines is a performance engine company. Period

                    ATK is a reman company, owned by an auto recycler, with a performance branch.......it wouldnt shock me if that roller cam is a regrind, and the reman content outweighs the new.

                    JMAC and BPE gets my money.
                     
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                    • dodge71demon

                      dodge71demon Well-Known Member

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                      absolutely correct and fully understood
                       
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                      • 66fyssh

                        66fyssh Don't Stop Believin' FABO Gold Member

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                        If you're interested in building one, here's a Hot Rod magazine article.

                        How to Add 129hp to a 5.9l Mopar Magnum - Engine Buldup - Hot Rod Network

                        I just picked up a low mileage 5.9 and am getting ready to build it. For now just intake, carb, headers, torque converter and timing set. Should get it to around 320 hp. Headers are the biggest expense since it's going into a 66 Barracuda. Hopefully I'll do it for around $2k.
                         
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                        • dodge71demon

                          dodge71demon Well-Known Member

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                          yes I have read that several times here's one that I like 5.9L Magnum Engine - Make Mine A 5.9
                           
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                          • YY1

                            YY1 Well-Known Member

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                            I agree that 320 is a pretty good "gross" HP calculation from the advertised stock 245 "net" HP number.
                             
                          • dodge71demon

                            dodge71demon Well-Known Member

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                            I want what I want and yes I squeeze ye old penny I will be replacing a weak LA 360 so I will use some stuff off it found one hell of a deal on a Vege which is basically ATK brand new 5.9 magnum long block in the crate close to making it happen I will be doing pretty much line for line in this article https://www.hotrod.com/articles/59l-magnum-engine-make-mine-a-5-9/
                             
                          • GFlo

                            GFlo Member

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                            Sorry to resurrect this thread, but it's a good one. I just picked up a '71 Valiant with 39,800 original miles. It is really solid and has a fresh blue metal flake paint job. I'm excited to have it!

                            It current has the 198 slant six (yes, not even the 225!) and I'm a power guy so I've been diligently researching crate engines. ATK and Blueprint were on my short list, hence resurrecting this thread. I'm an automotive engineer of 21 years in the Detroit area, so I get pretty deep into the weeds on technical factors.

                            So... I really want a good bang-for-the-buck motor and I'm drawn to the Magnum-based 408 from Blueprint. My question / concern is that both Blueprint and ATK use the stock Magnum heads which are crack-prone. Why not use (or at least offer for extra) the aftermarket and stronger EQ heads (EQ-CH318A)? They flow better and are much stronger. Also, how much does it really save to go backwards to a flat tappet cam? Aren't there good roller cams that don't cost much more? The Magnum engine block is already set up for roller.

                            @Johnny Mac - would love any input! Really trust your insight. If that motor had the better EQ heads and a moderate roller, it would be a no-brainer. Could that maybe be a mid-level upgrade between that and the aluminum head roller 408?
                             
                          • sireland67

                            sireland67 FABO Gold Member FABO Gold Member

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                            Why in the world would you want the straight down bolt intakes, there is hardly any selection in intakes, and even used ones are not cheap.
                             
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                            • TT5.9mag

                              TT5.9mag Two atmospheres are better than one

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                              The EQ heads are not being produced anymore last time I looked.
                               
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