Unported head quickness?

Mopar Racers Forum

  1. moparstud440

    moparstud440 Well-Known Member

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    1973 Duster 3270 race ready with driver
    360 .040 over 10.65:1 (Stock rods with ARP rod bolts with Speed Pro Pistons)
    OOTB Edlebrock RPM heads
    Victor 340 intake
    Holly 750 DP
    Comp Cams .519/.524 hydraulic cam
    727 with 5000 stall convertor
    Dana 60 with 4.56
    29.5x11.5 rear tire
    Shifted at 6000, went thru traps 6200-6400.

    Ran a best of 11.50 n really good air, but typically a 11.60-11.70s car.
     
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    • oldkimmer

      oldkimmer FABO Gold Member FABO Gold Member

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      My old duster 3000 pounds with driver. 10.0-1 440. 3800 J converter, cheater cam, 915 heads, TM7 Intake and 780 vs Holley and pro parts headers. 4.10 gears. 31.2x12.2x15 slicks. 11.001. Kim
       
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      • thesiren74

        thesiren74 Well-Known Member

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        74 duster heavy .480 cam 413 2500 stall 3.73 gears and 8.5.1 .....slow 13.04@ 105
         
      • motorcitymagnum

        motorcitymagnum Active Member

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        Posted some numbers and combo on new member site. Working on new set up and I’ll start putting it in build section Magnum setup with nitrous. Low 10’s. 125+.
         
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        • rumblefish360

          rumblefish360 So close, yet so far away FABO Gold Member

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          You should post them here because the new member section where you posted the numbers will disappear from most eyes and never be seen.
          You could also leave a link to that post.
           
        • motorcitymagnum

          motorcitymagnum Active Member

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          thanks! how do I do the link? I'm old dude, still a learnin!!

          since I'm here, this is what I was running. all facts and no b.s.
          1974 duster
          never have weighed,maybe tad over 3,000?
          started as 380hp 360 magnum.
          put on edelbrock heads right out of box. no work!
          single plane intake(hard to get) with reworked 750 hp holly proform body,etc,etc
          comp cam roller to my spec.. I know everyone wants specs!!!!
          nx single plate with 200+ shot at the hit.
          foot brake with turbo action convertor. been running for years, 2500-3000 stahl
          904 with work.
          3.55 with 8 3/4 moser stuff
          cal tracs and shocks
          qa1 front except k frame
          10 to 1 but cranking compression makes power!!!!
          junk headers with dynomax bullets
          10:50's all day in the summer heat. has run high 10:30's on one occasion in cold but I couldn't repeat rest of season-----fluke deal!!??
          mid to high 120's and regular great 60 foot times if it holds the tire! yes I do drive the @#$% out of it. give all my neighbors rides when its time for gas!! GEDC6141.jpg

          building a nasty, as one can get with a magnum, deal. hope it stays together
           
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          • rumblefish360

            rumblefish360 So close, yet so far away FABO Gold Member

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            Copy Where the address/page is displayed. Paste it in your reply. It will look like so; drag race front brake kits

            Yes! Cam specs (just the duration @050, centerline & lift would be awesome.) And your tire size would really be cool.

            The reason the thread was started requesting all the info is to help others in there endeavors. Don’t be secretive! If someone copies your combo, sit back and know that not only have you helped somebody out big time, but they loved it so much as to copy it which is the most sincerest form of flattery!
             
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            • LO23M8B

              LO23M8B Well-Known Member

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              Kicken butt with a small block COOL. If I can ask what rings are you using?
               
            • LO23M8B

              LO23M8B Well-Known Member

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              PS also head gaskets.
               
            • rumblefish360

              rumblefish360 So close, yet so far away FABO Gold Member

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              Those questions are directed to whom?
               
            • LO23M8B

              LO23M8B Well-Known Member

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              motorcitymagnum sorry for any confusion
               
            • 12swinger

              12swinger Well-Known Member

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              Never had a set of heads I didn’t do something to. Challenger went 13.50-13.60 with stock heads stock valves hp manifolds 440 six pack e body. Only did some bowl work 452 heads no port matching, 2.18 1.88 valves, 11.90 headers, same gear, fresh engine.
              Dart had several holes on the intake ports I had to repair on some j heads from day one.
               
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              • rumblefish360

                rumblefish360 So close, yet so far away FABO Gold Member

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                Then, FWIW (anybody reading) ether hit reply or call attention to the member with the “ @ “ symbol in front of there name without a space and they will be notified of this. Perhaps a quick and direct response will happen.

                @motorcitymagnum, your fans await!
                 
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                • greymouser7

                  greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

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                  Is that considered good?

                  I have heard of A body guys going 12’s with a stock stroke 360. Albeit lighter car.
                   
                • 12swinger

                  12swinger Well-Known Member

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                  Idk they ran 13s when new, that’s what mine ran mid 13s stock.
                  Ran 11s stock pocket ported heads, stock block, stock crank, and stock rods, probably run high 10s in my Dart or any decent A body. I’d say that’s pretty good.
                   
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                  • rumblefish360

                    rumblefish360 So close, yet so far away FABO Gold Member

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                    Lighter the better, a light car is your friend.
                     
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                    • 12swinger

                      12swinger Well-Known Member

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                      I’ve never had an A body with a big block in it.
                      Must be the easiest way I can think of to get one into the low 11s high 10s is with a mild big block.
                      If you had the means, some aluminum heads and a diet, and a low block, it’s not that much heavier then a iron small block.
                      That was a common gripe a race shop I worked at years ago criticized me on. Why I didn’t have a big block in my car?
                       
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                      • rumblefish360

                        rumblefish360 So close, yet so far away FABO Gold Member

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                        True and also the battle cry of many B/RB - A body owners here. I myself also went there with a 400/727-8-3/4 in a ‘72 rust bucket. It’s unfortunate that the 78 400 is stock minus the B body headers (which I’ll never do again) aluminum water pump and housing and a Holley Street Dominator w/an electric choke TQ.

                        Handling was OK at best. Stock slant 6 bars and no sway bars were not helpful.
                         
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                        • motorcitymagnum

                          motorcitymagnum Active Member

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                          sorry its taken so long to reply. busy,busy,busy. so I use sealed power rings,cometic head gaskets. P255-60-R15 mickey's et street radial(worn out of course!!)
                          I have always run small blocks. all steal car(except hood) and I hate doing body work. regardless of make,nose heavy cars don't do it for me. I try to achieve 50/50 weight balance and gutting a street car for bb, turns it into a rattling soda can. hence no body work(fender,doors,etc.) you can get a b motor close to same weight but lifting hood to show little magnum is the best. first drag pak challengers came magnums.
                          its not about total weight so much as is where's the weight. still lite is right!!

                          I talk to my neighbor about cars and bs all the time.maybe its my compulsion but I look at racing strictly from a mechanical point of view. certain amount of power to move a certain amount of weight a certain distance of measured time. of course its also based on what you can afford.!!

                          my setup is far from perfect. last years set up used no rocker arm girdle for example. I know I had stuff moving around.

                          as far as parts go with old combo nothing crazy. its just an air pump(engine)stock block obviously for magnum. factory forged rods,cast crank(I know,i know). stock parts can mean a lot of things. heads,cam,intake,exhaust,carb,cranking compression,little n20,etc are the money shot. short block is along for the fun ride!

                          my goal is a 9 sec magnum powered street driven duster,(4/10th's away with old setup) i'm going back to the garage to make it happen(pics to follow)

                          thanks,motorcity magnum still looking for my old cam card!! seriously
                           
                        • roccodart440

                          roccodart440 Well-Known Member

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                          "Heard of"

                          I've heard of a lot of things. Most people have no idea what it takes to go 12's. A stock stroke 360 gives virtually no info. What else was done to the engine and the car?

                          I.e. A brand new Camaro with 425HP and sticky rubber goes high 12's. No stock 360 EVER made 425hp.

                          My classic line when someone goes to the strip for the 1st time and they ask "do you think my car will run 12's"? I always say yes. ALL OF THEM....... And all of the 13's and all of the 14's too.
                           
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                          • greymouser7

                            greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

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                            Heard of-from people here on FABO.

                            No I am not an expert, that’s why I asked the question. I didn’t say stock 360, I said stock stroke 360,,, 3.58”

                            No need to get your panties in a bunch.
                            My apologies for offending you!
                             
                            Last edited: Feb 25, 2020
                          • rumblefish360

                            rumblefish360 So close, yet so far away FABO Gold Member

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                            MP crate 360/380 engines get it done.
                             
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                            • roccodart440

                              roccodart440 Well-Known Member

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                              you didn't offend me. I just get a kick out of the I heard folks.

                              The dragstrip is a place of humbling.
                               
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                              • rumblefish360

                                rumblefish360 So close, yet so far away FABO Gold Member

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                                My dyno guy calls his machine the “humbler” or the “Heartbreaker” machine.

                                The drag strip is such a place only if you set you car up for the strip. I have people asking me how much power my engine makes. When I give them my est. of the potential power output, they immediately rushed to how fast the car is in the 1/4. Or should I say should be.

                                I just smile and say that’s only true if the car is set for the track designed as so to take advantage of every last bit of power for the lowest ET possible. Which is a huge difference in a street driver.

                                I actually had a moron tell me that’s not true and that my car with 3.55’s should be within a tenth of his recommended 4.56’s.

                                Ummmmmmm, OK then!

                                Cant argue with stupid, they just drag me down and kick my ass with there overly experienced methodology.
                                 
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                                • greymouser7

                                  greymouser7 Vagrant Vagabond “Veni Vidi Vici” FABO Gold Member

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                                  how much does weight (i guess by the 100 pounds) affect power in the quarter?
                                  I was under the impression that a 440 (in an E-body) would overcome the weight advantage of a souped up 360 in a light a-body. Without experience as a reference point, I had to ask the question. Obviously the OP's 440 isn't stock, don't know about the converter, the mopar books say a three speed auto is best for the quarter (condemning powerglides), and now i forget the OP's axle gear ratio (setup for street probably-NOT track). Is that good? refers to the OP's street, 440, Ebody performance.
                                   
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