Speedmaster Small block porting tips and results

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  1. pittsburghracer

    pittsburghracer Well-Known Member

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    You know which one. Lol. Of course the one I posted the numbers for. Very fixable
     
  2. yellow rose

    yellow rose Doctor of Thinkology.

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    LOL.
     
  3. cookietruck

    cookietruck Well-Known Member

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    i know there was a post about this somewhere...but there are so many junk posts in all these threads i'm gonna just ask.

    these speedmaster heads (and therefore, sidewinder and edelbrock) can use an 11/32", 4.911" long "chevy" valve right???
     
    Last edited: Jan 17, 2020
  4. 70aarcuda

    70aarcuda Master Hoader of SBM FABO Gold Member

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    No...11/32 5.011 valve
     
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    • MOPAROFFICIAL

      MOPAROFFICIAL Well-Known Member

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      Can and should, 2 diff things.
      Sure they could, if you use all that stock oriented crap and limit the whole thing.

      Are you lost?
       
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      • pittsburghracer

        pittsburghracer Well-Known Member

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        I finally picked up a new thickness checker (sonic checker) last week and calibrated it for steel, cast iron, and aluminum. When I finish up my 408 shortblock I will do some testing to see if the Speedmaster heads have less water in them (floor) than the Edelbrock heads do.
         
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        • yellow rose

          yellow rose Doctor of Thinkology.

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          What did you buy?? I should probably have one at home.
           
        • pittsburghracer

          pittsburghracer Well-Known Member

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          TM8812 Ultrasonic Thickness Gauge 1.2-200mm,0.05-8inch


          I paid 220.00 for it from Amazon. Its listed on ebay for 160.00 but the guy had some VERY bad reviews, the shipping date was very open ended, and his ad said you may have to pay import duties. I ordered it on Tuesday and had it on Friday. I will at a later date order a smaller 6mm probe. Amazon doesn't list it at times. I started a post on Yellowbullet asking for suggestions and was told this one was rated highly by the members of Speedtalk.
           
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          • 360duster

            360duster Well-Known Member

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            interesting, let us know how accurate it is. Such thing is on my wish list….really like to know about wall thickness when doing an engine.

            Michael
             
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            • justinp61

              justinp61 Well-Known Member

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              John, does it have a place to select which metal you are checking? The reason I ask is the guy that did my block said he calibrated to the metal he was checking.
               
            • pittsburghracer

              pittsburghracer Well-Known Member

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              The meter has cd01-cd11 to set from for anything from steel glass pvc copper etc. trouble is when setting it that way you have a cast iron setting, gear cast iron, modular cast iron. Using those settings I think the closest I got it was .020-.030 and who would really know. Heck the one iron setting was .100 off. Using it manually I am setting it to a part of a know thickness. I plugged in the cast iron setting I programmed in three days ago and checked the motor mount on my engine block. There was .002 difference between the checker and my Harbor Freight digital calipers. That’s close enough for this guy. I found the manual setting to be.
              6350 aluminum
              4950 engine block
              5890 steel

              That may save someone some time. I don’t really have a lot of time to play with it now but wanted to check it out in case it didn’t work. It has a .198 steel button on it to calibrate to for steel.
               
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              • pittsburghracer

                pittsburghracer Well-Known Member

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                Just for example I put in the setting for aluminum that I set from check a piece of aluminum bar stock. It read .250 exactly like the other night. But checking an Edelbrock Head that setting is way off.
                 
              • gzig5

                gzig5 Well-Known Member

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                Aluminum bar is extruded and a head is cast. Different alloys too. Makes sense they are different because the densities are like night and day between them.

                Love to have tools like that but can be hard to justify. But if I don’t have to drag the block to a shop and pay them it may be worth it.
                 
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                • K.O. SWINGER

                  K.O. SWINGER Well-Known Member

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                  That's really cool Pittsburgh, so much speculation can be eliminated keep the post coming!
                   
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                  • ou812

                    ou812 Well-Known Member

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                    You have to grind a "flat" in the area you want to check...sonic testing ports is difficult.
                     
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                    • pittsburghracer

                      pittsburghracer Well-Known Member

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                      Ohhh I hear you. There are very few times I even worry bout it, until I want to do some questionable blending. That 6mm probe would probably come in handy.
                       
                    • justinp61

                      justinp61 Well-Known Member

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                      That's what my guy did, he set it up on the main web on my R1 block. He also said that the material that it it was calibrated on could change the accuracy. If it was calibrated on something like a normal production block and then used in a high nickel content block the measurements would be off. That's why he calibrated on the block he was checking.
                       
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                      • pittsburghracer

                        pittsburghracer Well-Known Member

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                        Like I said after you get used to manually setting it, it’s not that complicated or time consuming.
                         
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