3RD GEN HEMI FOR BRACKET RACING

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  1. mikedevore

    mikedevore Well-Known Member

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    I have always been able to come up with suitable engine blocks any given time.
    Went through 5 360 blocks recently trying to find one that would clean up at .060.
    No luck, most of these were solid blocks when stored until the rust got to them.

    Got me to thinking about an alternative to my 340-360 bracket engines.
    Anyone bracket racing the GEN3 HEMI engines?
    What does it take to make a 5.7 go mid 10's in a typical a-body at around 3100LBS?
    I would like to run a carburetor.
    Share what you have.


    Thanks.
     
  2. o1heavy

    o1heavy 1974 dart sport

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    I’ve considered the same route your looking at
    There is a guy over at Moparts with and
    Pre-eagle stock 5.7 with a small cam
    And a set of eagle heads in a 3150 Dakota
    And it runs 6.80’s
    Eagle heads and the older position makes for high compression and is his reason for lack cam
     
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    • toplscuda

      toplscuda Well-Known Member

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      • 408 swinger

        408 swinger FABO Gold Member FABO Gold Member

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        I was/will be bracket racing a gen 3. Making a 5.7 go 10's @ 3100 lbs. is easy. Open up your wallet, lol! Seriously though, if you are serious about this, look at the stats list sticky mentioned above. There is also a build on Moparts that details a 5.7 based 392 that is in the 9's. Keeping carbed is no problem. Pick an intake (probably stay with a tall drag pak/ritter) and use the MSD Hemi 6 ignition and wiring for 08 and older. If wanting to keep it simple, stay with 08 older 5.7 or any 6.1.
         
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        • toplscuda

          toplscuda Well-Known Member

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          Also review rat patrols posts in the new hemi forum on the trials and tribulations he went through with different intakes to save yourself some money trying different ones.
           
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          • RockinRobin

            RockinRobin Well-Known Member

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            My setup sounds like what you are looking for:
            70 Duster
            5.7 Gen III Hemi stroked out to 414, 12:5 compression
            Decent comp cam
            Mopar drag pak intake, 1050 Dominator
            727 torqueflite, 4.56 Dana 60, spool
            Car weighs about 2800 empty and runs 6.40 8th mile and 10.1 1/4 mile.
            This is our 4th season to race this car and it is doing fine.
             
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            • o1heavy

              o1heavy 1974 dart sport

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              You mind sharing cost and what kinda of power it has made,best ET Likes ,dislikes vs
              The old setup
              If I remember correctly bes built yours right
              Eagle heads ??
               
            • RockinRobin

              RockinRobin Well-Known Member

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              pm sent...
               
            • mopar65

              mopar65 Well-Known Member

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              That is my friends truck and yes I think it’s pretty fast for pretty much used stuff. If I remember right when he got the used engine it had a hole in the block from a rod letting go. He just welded it up and went on. Lol
               
            • moper

              moper FABO Gold Member FABO Gold Member

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              Honestly, when I get around to my own serious race/street effort, it will use the G3 platform. Bocks are really good, and REALLY PLENTIFUL. It take some money to run fast reliably with any plant. But with Mopar and the significant portion of aftermarket getting away from anything not 2G hemi the required parts are drying up.
               
            • ou812

              ou812 Well-Known Member

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              5.7 with a 4.050 crank, good pistons with some valve relief, Eagle heads with slightly larger valves and mild port work...11:1 using pump gas can yeild about 575HP and will run well into the 10's.
               
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              • o1heavy

                o1heavy 1974 dart sport

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                I would love to build a stroked 5.7 with eagle heads as the parts are everywhere
                Just not seeing the e.t’s and or horsepower
                Levels where I wanna run
                Before I jump I wanna see 650 -675 hp builds
                 
              • Edsrt

                Edsrt Well-Known Member

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                Putting together a 2012 5.7 to run in my 70 Duster to run in street class , you can run as quick as 11.5 on dot tires. Since the motor is rated at 390 hp in stock trim I would not think it hard to achieve in a 3200 lbs car with a 4spd and 3.90 gears. Plus I think the fuel injection would make it more consistent in all weather conditions.
                 
              • 408 swinger

                408 swinger FABO Gold Member FABO Gold Member

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                Go over to moparts and look up Triple Threat's "My bracket Hemi build". He has Apache instead of Eagle heads. 5.7 based 392. Chassis dyno'ed at 515 to the tire with convertor wanting to flash like 6300. He's in the nine's. I have a 6.1 based 426 that engine dyno'ed at 730 using cnc ported early heads. I would love to do cnc Eagles and see what happens.
                 
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                • Hot Metal

                  Hot Metal '69 440 Cuda

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                  In a 3100lbs car at the line that hooks will take a mere actual on track 535fwhp>
                  60 Foot E.T. : 1.45
                  1/8 Mile E.T. : 6.60
                  1/8 Mile Trap Speed : 102.97
                  1/4 Mile E.T. : 10.46
                  1/4 Mile Trap Speed : 128
                   
                • mopar65

                  mopar65 Well-Known Member

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                • ou812

                  ou812 Well-Known Member

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                  We did a 5.7 block, 4.050 stroke, 12.75:1 on E85, oem rocker and lifters, Ritter intake, custom IMM cam (only .610 lift) and very mildly ported 6.4 apache heads and made 695HP on our dyno. Easy....
                   
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                  • o1heavy

                    o1heavy 1974 dart sport

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                    shelf piston or custom
                     
                  • ou812

                    ou812 Well-Known Member

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                    Custom...
                     
                  • Pascamp

                    Pascamp Well-Known Member

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                    Would you mind sharing more details about this build? It seems that only a few guys are doing hardcore NA builds, and most are pretty tight lipped on the details. It gets tiresome wading through thousands of posts about bolt on crap.

                    What oiling mods did you do? I know all the aftermarket cranks have Chevy style drilling and more oil capacity is needed to keep from sucking the pan dry.

                    I like the fact that you kept the lift down, as I'm familiar with the rocker to pushrod angles. As high as they had to put the cam to clear the head, the pushrods are almost horizontal it seems. Did you use a standard timing chain? Any other valve train mods required to keep things from coming unhinged?

                    I'm familiar with how detonation prone the G3's are (everyone I've opened looked like the pistons were in a war). With the E85 were you able to use more typical ignition timing?

                    Any other obstacles you encountered during this build?

                    Thanks
                     
                  • ou812

                    ou812 Well-Known Member

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                    It also gets tiresome when I'm expected to provide details about how I make my living :) Try not to over think the Gen3 platform and you'll be fine.
                    I did use the manley timing setup and is worth the money.
                     
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                    • Pascamp

                      Pascamp Well-Known Member

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                      Fair enough. I thought you were getting out, or I wouldn't have asked. Thanks for the Manley tip.
                       
                    • ou812

                      ou812 Well-Known Member

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                      Getting out? Not sure what that means...to be honest, there's not a lot to elaborate on really...unless you are planning on going over 7800rpm. Then, there's a few things to do!
                      IMO, the damn awkward timing cover is one of the biggest hurdles to overcome!
                       
                    • Pascamp

                      Pascamp Well-Known Member

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                      Sorry, I must have you confused with one of the other builders that posts on here regularly. He said he was done and is just finishing up his prior obligations.
                       
                    • ou812

                      ou812 Well-Known Member

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                      Shhhhhhiiiiiiit I'm going to be doing this for a good while longer :D
                       
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