Are these swirl ports?

Small Block Mopar Engine

  1. DSMRossi

    DSMRossi Well-Known Member

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    I can’t find anything on the casting number. 1.88 on the intakes, open chamber. Came off a late 70’s 360. Has the little 1/4” holes under the exhaust runners.

    Taking them off for a set of IMM/Indy’s that I have on the way, just wondering what these were.

    4CA54C21-A9F9-4515-A9CE-5D769E2A9E1F.jpeg

    220360ED-B6E5-4A44-B16E-D53CBA2BB0EE.jpeg
     
  2. toolmanmike

    toolmanmike FABO Staff Staff Member FABO Gold Member

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    Nope
     
  3. dartfreak75

    dartfreak75 Restore it, Dont part it! FABO Gold Member

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    Nope is correct!!
     
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    • DSMRossi

      DSMRossi Well-Known Member

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      I’m a little confused, it looks like they share the same casting #?

      5FD3B493-1723-47C9-9F75-F365CC4FD45B.png
       
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      • MOPAROFFICIAL

        MOPAROFFICIAL Well-Known Member

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        Swirl port debate, I was in that years ago.
         
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        • toolmanmike

          toolmanmike FABO Staff Staff Member FABO Gold Member

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          Wondering what they are? Look the number up like we do. Looking at your photos they don't look like a closed chamber "swirl port" chamber.
           
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          • DSMRossi

            DSMRossi Well-Known Member

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            If you read post 1 (like the others did), you’ll see I already did and there’s not really any info on them besides a couple vague posts.
             
          • toolmanmike

            toolmanmike FABO Staff Staff Member FABO Gold Member

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            I don't see the swirl port combustion chamber.
             
          • Mr. Sinister

            Mr. Sinister Devastation Manager FABO Gold Member

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            No heart shaped chamber= No swirl port 302 casting 318 308 casting 360 last 3 digits of casting number
             
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            • dartfreak75

              dartfreak75 Restore it, Dont part it! FABO Gold Member

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              The swirl port refers to the closed chambered heads.
              I have pics give me a second
               
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              • toolmanmike

                toolmanmike FABO Staff Staff Member FABO Gold Member

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                ....

                swirl port.jpg
                 
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                • dartfreak75

                  dartfreak75 Restore it, Dont part it! FABO Gold Member

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                  • DSMRossi

                    DSMRossi Well-Known Member

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                    ahhh!

                    See I thought the 308’s had a big open chamber, I didn’t realize they had the heart shaped quench
                     
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                    • DSMRossi

                      DSMRossi Well-Known Member

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                      ?

                      90474D46-BA3A-47C4-B61F-A6ED5E22698E.jpeg
                       
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                      • Jadaharabi

                        Jadaharabi FABO Gold Member FABO Gold Member

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                        How old is this price? Although it is not a roller motor pictured that is a good price for a 3 quarter motor.
                         
                      • dartfreak75

                        dartfreak75 Restore it, Dont part it! FABO Gold Member

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                        I'm not sure about that statement!!!
                        To my understanding the term "swirl port" refers to closed chambers (heart shaped)
                        Those are good heads. I wouldn't get caught up in the "swirl port" terminology. Run the heads there is nothing wrong with them!
                         
                      • dartfreak75

                        dartfreak75 Restore it, Dont part it! FABO Gold Member

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                        I just saw in your original post that you ordered indy heads ignore my last sentence lol
                         
                      • jimjimjimmy

                        jimjimjimmy lobsterman FABO Gold Member

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                      • DSMRossi

                        DSMRossi Well-Known Member

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                        From what I’ve read, swirl port refers to the intake port behind the valve and the way the air is channeled through it.

                        83555132-AE0D-4D96-AB1E-7C9CB16E0728.png
                         
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                        • DSMRossi

                          DSMRossi Well-Known Member

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                          I could be wrong, but that was my understanding
                           
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                          • dartfreak75

                            dartfreak75 Restore it, Dont part it! FABO Gold Member

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                            There is only one way to find out.
                            Pull the valves and look. I may be wrong in my definition of swirl ports!!
                            I have a set of 302 heads and they dont look like that photo of "swirl port"
                             
                          • RustyRatRod

                            RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                            Actually, nope is not correct. According to Larry Shepard in the MP engine book, "all" of the open chamber heads were indeed swirl port. It's in the book in black and white. They did extensive testing on all of the castings and they found the small block were swirl castings even before the swirl castings came out. It's a fact.
                             
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                            • dartfreak75

                              dartfreak75 Restore it, Dont part it! FABO Gold Member

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                              Here are my 302

                              20181108_085018.jpg
                               
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                              • dartfreak75

                                dartfreak75 Restore it, Dont part it! FABO Gold Member

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                                That is interesting. I did not know that. So all small block open chambered heads are swirl ports???
                                What about closed chambers heads are they swirl ports also??
                                 
                              • RustyRatRod

                                RustyRatRod 30 Degrees Outta Whack FABO Gold Member

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                                I don't think they did testing on closed chamber stuff. They had no need for 273 stuff. All of the testing I am aware of was done on the 318/340 and 360 open chamber heads. It wouldn't surprise me if the closed chambers were too, because Chrysler was ahead of the times like that.
                                 
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