- #1
Crazymechanic
- 831
- 12
Hi there ,
I have two cast iron crankshafts for an engine I'm building , now even though they are similar in every way , made ofr the same engine etc etc, there is one thing I noticed different and it got my attention ,
I took a stainless steel screwdriver and hit each one of the cranks at their " cheeks" or other parts that aren't asociated with sleeve bearing mounts.
Now the interesting thing here is that they both have this ring like a bell but a more precise tone.Now that doesn't surprise me but what surprises me is that one crank has a higher pitch while the other has a lower one , and the difference is pretty audible , with nothing but a human ear i can clearly tell the one crank sounds higher in pitch while the other lower.
Does somebody know what does that mean in terms of the cast itself and maybe the material used and how pure it is and other factors related to structural things of cast iron or metal in general?
thanks.
I have two cast iron crankshafts for an engine I'm building , now even though they are similar in every way , made ofr the same engine etc etc, there is one thing I noticed different and it got my attention ,
I took a stainless steel screwdriver and hit each one of the cranks at their " cheeks" or other parts that aren't asociated with sleeve bearing mounts.
Now the interesting thing here is that they both have this ring like a bell but a more precise tone.Now that doesn't surprise me but what surprises me is that one crank has a higher pitch while the other has a lower one , and the difference is pretty audible , with nothing but a human ear i can clearly tell the one crank sounds higher in pitch while the other lower.
Does somebody know what does that mean in terms of the cast itself and maybe the material used and how pure it is and other factors related to structural things of cast iron or metal in general?
thanks.