Anybody running 10s with a small block and factory iron heads

Mopar Racers Forum

  1. ValiantRacing

    ValiantRacing Well-Known Member

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    The ports are not real big, i run a 4.56 gear, this car is not driven on the street, but the engine was in a street car for years, i just put a smaller cam in, and when i done with engine its going in a 73 Duster street car. I have a 340 i going to build.
     
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    • Demonracer

      Demonracer 71 Demon 00 Ram 16 Chrysler 300S 05 Caravan FABO Gold Member

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      If you are going for Stock Eliminator, the E,F,G & H classes are a tough playground. There are a lot of SBM running in Division 4 in those classes & most of them can run 1.00 or better under the index without trying.
       
    • B3422w5

      B3422w5 Well-Known Member

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      doesn't much matter. Its a bracket race at the end of the day.
      Not many( if any) events where a stock or superstocker even if nowhere close to that far under the index cant compete.
       
    • 70aarcuda

      70aarcuda Master Hoader of SBM FABO Gold Member

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      Not always a bracket race....friend of mine in his F/SA 340 Barracuda 68 FB has two heads up races in the 1st Divisional Race in Vegas......1st one to the finish line wins
       
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      • 318willrun

        318willrun Utube channel 318willrun

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        Yep, in a stocker meet it's like bracket racing unless they are in the same class, then it's heads up.
         
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        • ValiantRacing

          ValiantRacing Well-Known Member

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          I am going to build an engine one of these days for stock, i have a Barracuda i run in stock now, my daughter will run that, i will drive the Duster, my plan is to be in D-SA
           
          Last edited: Apr 12, 2021
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          • B3422w5

            B3422w5 Well-Known Member

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            right. Winning class is the only time it matters. And sometimes you might not even have another car in your class.
            But its 95% bracket racing. That is where the primary focus of the vast majority of guys is.
             
          • BVoelzke

            BVoelzke Well-Known Member

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            Thats cool Valiant ! , some of the D/SA Dusters are flying right now.. theres a local pretty successful stock racer that runs a big block D-E/SA Camaro he tells me the Mopars give him fits as his big block can't run with them ... good to hear!
             
          • GTX JOHN

            GTX JOHN Well-Known Member

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            68 Valiant 360 w/ 308 Heads with exhausts ported D like W 2
            3500 Convertor/904 275 low 391 gears 3300 runs 10.80 thru
            mufflers @ 119 in LVMS track @ 3500 FT on Station
            Perf. RPM / 950HP. Street Driver
            It was Hot rod cover car. 408 going in soon with Indy heads.
            360 will be for sale

            Also two 71 Stock 340 Demons that run deep in 10s legal Stock
            Blue one ran 10.60/121.7 @ 3500 ft last week at LVMS
            at Division Race with new engine with break in Oil
            X iron heads/10 to 1 Comp

            Goggle: John Irving Drag Racer
             
            Last edited: Apr 14, 2021
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            • BVoelzke

              BVoelzke Well-Known Member

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              That's Cool John , all of your cars here impressive!!!
               
            • GTX JOHN

              GTX JOHN Well-Known Member

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              Thanks!

              The stocker 340 are the toughest with stock heads intake carb compressoin
              and cam lift. The trick to all these is top rate machine work and LOTS of
              time and patience!
               
            • QuickDart360

              QuickDart360 Well-Known Member

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              Did the X heads get any port work? Sounds impressive for stock X'ers!!:thumbsup:
               
            • GTX JOHN

              GTX JOHN Well-Known Member

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              No sir = We have been to the tear down barn a dozen times
              Heads are carefully CC in the runners intake/exhaust as well
              as valve removed and visually inspected by tech men who are
              usually engine builders and or machinists or Both!
              We do flow/inspect many heads to find the best ones. You would
              be surprised how much these old casting vary from one to another.
              We have 100 plus sets of heads on the shelf.
               
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              • QuickDart360

                QuickDart360 Well-Known Member

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                Reason I ask is because I have e set of X heads on my 360 in a dart sport and it runs terrific!! But but these at a swap meet many moons ago and being young and on a tight budget just did a valve job and new guides and ran them!
                 
              • rumblefish360

                rumblefish360 So close, yet so far away FABO Gold Member

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                @GTX JOHN
                I’ve heard the head flow can carry a lot.
                What kind of spread do you see?
                 
              • GTX JOHN

                GTX JOHN Well-Known Member

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                I have seen 30 CFM variance between ones I have
                tested. That does not include some castings that came
                from the factory so darn bad that I rejected them upon visual
                inspection. I have seen exhaust port 1/3 closed from core shift.
                They used the castings over often 10 times back then before discrding
                Look at the # after the 894 IE: - 1 to 9. Every time they used the
                casting they raised the # on diget. Generally the core shift is seldom
                anything but detrimental. The lower the number of times the casting
                was used the better the port configuration!
                 
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                • rumblefish360

                  rumblefish360 So close, yet so far away FABO Gold Member

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                  Thanks, I’ll keep that in mind, for sure!
                   
                • pittsburghracer

                  pittsburghracer Well-Known Member

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                  I flowed a set of stocker heads for a buddy many year ago and it was probably for simplicity reasons one of the most impressive heads I’ve ever had on my bench. It was a free-be job and one that didn’t really interest me because it’s a game I’ve never played or will. I still wish I would have kept a copy of the flow numbers because it got to its max number quickly and never dropped off and went the other way. I know why and how, “valve job angles” and I know it cost 100’s of thousands of dollars to figure it out years ago but these guys that build stocker engines nailed it. Probably 50, or 52, or 55 degree seat angles but when my buddy asked if I could do a valve job for him I laughed and said all I could do is screw those heads up with my simple tools. I told him if he wanted a fast reply ask the shop he bought them from what valve angles they used. Lol . So for the heck of it he did and the guy almost chocked laughing. I’ll just say those heads didn’t hit 250 cfm.
                   
                • furrystump

                  furrystump Well-Known Member

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                  So, I have to assume the “somewhat bad heads” would be perfectly fine in a ported condition. The real bad core shift no, but there is some very usable heads on that shelf!
                   
                • GTX JOHN

                  GTX JOHN Well-Known Member

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                  The ones on my shelf are all pretty decent. The ones that sere real bad we just
                  did not buy unless we got them on an engine. We used to go to Pomona Swap Meet
                  every month for 20 years. You are right if Ported they would be fine BUT with that
                  much core shift I would be a bit nervous about the thickness of the port walls. I guess
                  just do the crummy ports first and if they go thru just toss them out if you have the time. I run stock heads so I am not knowledgeable about porting. The man who said
                  you would never see 250 CFM is ABSOLUTELY right = Stock Xs do NOT flow that on
                  the optimistic flow bench in the country!!
                   
                • Dartswinger70

                  Dartswinger70 Well-Known Member

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                  I would think a small block A body could run 10s with stock cast 340-360 ported heads and some "juice"
                   
                • rumblefish360

                  rumblefish360 So close, yet so far away FABO Gold Member

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                  HP to Weight.... can you make them meet?
                   
                • Dartswinger70

                  Dartswinger70 Well-Known Member

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                  Well the A body already has good power to weight in terms of the 340 cars. I mean lighten it up,and go right?
                   
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                  • rumblefish360

                    rumblefish360 So close, yet so far away FABO Gold Member

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                    That’s the way I’ll be working the problem!
                    LMAO!
                     
                  • 70aarcuda

                    70aarcuda Master Hoader of SBM FABO Gold Member

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                    Good luck this weekend
                    Hope you and your son go many rounds in both stock and super stock
                    This will be the first time in 10 yrs I won't be passing out the time slips
                    Don't think Anita will be either

                    Tony
                     
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