340 Build Final Combo. What Do You Think?

Small Block Mopar Engine

  1. Road Grabber

    Road Grabber Well-Known Member

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    I don't know anyone else's experience but I used an aluminum flywheel one time and hated it. There was no inertia for letting off the clutch and I didn't like it for the street at all. I found myself burning the clutch more to get going and hole shots was much different. It was a 440 with plenty of power. Starting off in gear was terrible. Just a thought. I am sure the others have thoughts to share. Good luck. Great motor!
     
  2. mderoy340

    mderoy340 Well-Known Member

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    Very similar to my combo except trans, 110 is realistic.
     
  3. yellow rose

    yellow rose Master Of Insanity

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    I never use anything but aluminum. If you have a 2.20 first gear (Chrysler never made a box with that first gear ratio but IIRC the M21 or M22 Muncie had something like that worthless first gear so I’m using that as an example) and a 3.08 axle ratio it may not like an aluminum flywheel.

    And if the car is 4500 ponds and geared like that it would suck.
     
  4. RAMM

    RAMM Well-Known Member

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    Empty your inbox please. J.Rob
     
  5. ir3333

    ir3333 Well-Known Member

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    i'm not convinced that cam is a good match for the J heads.For a daily driver i'd opt for the rpm and ditch the air gap.Drop down to 2 1/2" exhaust and 1 5/8" headers.No H or X and 650 Thunder Edelbrock
    ...is 10:1 estimated?
     
    Last edited: Jul 11, 2020
  6. ValiantKindOfGuy

    ValiantKindOfGuy Well-Known Member

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    You almost had me for a second... I almost thought you were serious until I saw no x or h :rofl:
    I’m surprised you didn’t go with a thermoquad lol.
    No it’s calculated along with my dynamic.
     
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    • ValiantKindOfGuy

      ValiantKindOfGuy Well-Known Member

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      Getting on it now sorry.
       
    • ValiantKindOfGuy

      ValiantKindOfGuy Well-Known Member

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      That’s what I was hoping. What’s your combo?
       
    • Wyrmrider

      Wyrmrider FABO Gold Member FABO Gold Member

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      I took it the way RRR posted
       
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      • CRUZE 418

        CRUZE 418 FABO Gold Member FABO Gold Member

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        I also took the way that it was posted. No way that you would ever have enough valve clearance. My understanding.
        Sometimes-----------------------------------
         
      • ValiantKindOfGuy

        ValiantKindOfGuy Well-Known Member

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        So you took it as I did?
         
      • CRUZE 418

        CRUZE 418 FABO Gold Member FABO Gold Member

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        YES
         
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        • ValiantKindOfGuy

          ValiantKindOfGuy Well-Known Member

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          Gotcha. I have no problem with rusty. At all. In all honestly I overreacted a little and I’m over it.
           
        • ir3333

          ir3333 Well-Known Member

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          what do your heads flow?
           
        • ValiantKindOfGuy

          ValiantKindOfGuy Well-Known Member

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          No idea. Didn’t do the port work so let’s say better than a stock port or worse than a stock port.
           
        • ir3333

          ir3333 Well-Known Member

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          OK..stock heads stall out at about .480 lift and that's why i questioned the cam. I thought i read daily driver and your other choices seem to favour a quarter mile piece.
           
        • ValiantKindOfGuy

          ValiantKindOfGuy Well-Known Member

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          I’m really don’t mind suffering a bit to be as max effort as I can when it comes to a daily. In my opinion a bigger cam doesn’t change drivability it just changes the rpm range at which you do so. From what I’ve seen from the stock port heads, you are absolutely right. But I’m hoping with this port work it will allow the flow to average in higher lifts (not necessarily gain) so I’d be okay. The cam is being run because it’s what I have even though I need better heads. (Would really like a set of LAX heads)
           
        • RustyRatRod

          RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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          Here is what I MEANT to say. My bad. I'm old and I was tired.

          "I don't think that combo has a snowball's chance in hell of piston to valve INTERFERENCE"

          But again, nothing smartass was EVER meant or implied.
           
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          • ValiantKindOfGuy

            ValiantKindOfGuy Well-Known Member

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            It’s over with. No hard feelings just let it go.
             
          • Nat

            Nat Well-Known Member

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            you should be able to do that , i had a 340 similar build but automatic ran a best of 13.1 at 106 mph , but i'm not much of a drag racer and traction was a problem . you should do better
             
          • ValiantKindOfGuy

            ValiantKindOfGuy Well-Known Member

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            It should be around there
            I’m hoping to get the whole car together in the next couple weeks. Hopefully it goes that quick lol.
             
          • mderoy340

            mderoy340 Well-Known Member

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            67 Dart - 340 .040 Speed Pro flat tops .020 above 10.3:1, 4bbl 750dp, Airgap, Comp SFT XS274S 236@.050 cam .500 lift, 63cc IMM indy LA X iron heads, TTI headers, low gear set 904/gvod, Turbo Action 10" 3200 converter 4.10, 3200 lbs. Best so far 11.77@113.7
             
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            • ValiantKindOfGuy

              ValiantKindOfGuy Well-Known Member

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              How in the hell could I possibly buy those heads from you? Lol kidding. Kinda. I’ve been looking for a set of IMM LAX heads.
               
            • mderoy340

              mderoy340 Well-Known Member

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              They do work good; it would take a pile of cash for me to part with them!
               
            • ValiantKindOfGuy

              ValiantKindOfGuy Well-Known Member

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              I can imagine why haha. They are sweet heads and I would love to get a set. If you guys have a set feel free to pm me lol.
               
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