Morris
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I wanted to add this to the Wiki, but was unable to register. If any of you can help me in that matter, I will appreciate you greatly. The article follows:
This is a "budget" procedure for measuring the volume of your combustion chamber based on advice given to me by the incomparable Hap Waldrop. Combustion chamber volume is a critical measurement needed to calculate compression ratio. https://www.csgnetwork.com/compcalc.html
Materials you will need:
1) A syringe marked in CC or ML. 1CC = 1ML. Hap recommended a feeding tube syringe, which typically come in 60-70CC sizes and cost a few dollars. The drug store around the corner from my house did not have any, but they gave me a 5ML syringe for free.
2) Wood shims (usually available from the hardware store for a few dollar.
3) A piece of plexiglass (or similar) large enough to cover one combustion chamber. This is also something you can get from the hardware store for a few dollars.
4) Grease or Vaseline.
5) Rubbing alcohol.
First you will need to place your head upside down on your workbench and level it as best you can. The wood shims will help you get the head level. Drill two holes in the plexiglass so that they will be on opposite ends of the combustion chamber when it is covered by the plexiglass. Smear Vaseline or grease on the surface of the head around the chamber you will be measuring (I use Vaseline because it is less messy). Cover the chamber with the plexiglass pushing the plexiglass firmly against the head so that the grease forms a seal. Fill the syringe with alcohol to its measured capacity. Using one of the holes you drilled into the plexiglass, slowly inject alcohol into the chamber until you can see no more air bubbles. If you have a large syringe, simply subtract the amount of alcohol from the amount you started with and that is the volume of your chamber. If you have a small syringe as I did, you will have to track how many times you empty the syringe into the chamber, then subtract the what remains in the syringe after the final injection and add it all together.
This is a "budget" procedure for measuring the volume of your combustion chamber based on advice given to me by the incomparable Hap Waldrop. Combustion chamber volume is a critical measurement needed to calculate compression ratio. https://www.csgnetwork.com/compcalc.html
Materials you will need:
1) A syringe marked in CC or ML. 1CC = 1ML. Hap recommended a feeding tube syringe, which typically come in 60-70CC sizes and cost a few dollars. The drug store around the corner from my house did not have any, but they gave me a 5ML syringe for free.
2) Wood shims (usually available from the hardware store for a few dollar.
3) A piece of plexiglass (or similar) large enough to cover one combustion chamber. This is also something you can get from the hardware store for a few dollars.
4) Grease or Vaseline.
5) Rubbing alcohol.
First you will need to place your head upside down on your workbench and level it as best you can. The wood shims will help you get the head level. Drill two holes in the plexiglass so that they will be on opposite ends of the combustion chamber when it is covered by the plexiglass. Smear Vaseline or grease on the surface of the head around the chamber you will be measuring (I use Vaseline because it is less messy). Cover the chamber with the plexiglass pushing the plexiglass firmly against the head so that the grease forms a seal. Fill the syringe with alcohol to its measured capacity. Using one of the holes you drilled into the plexiglass, slowly inject alcohol into the chamber until you can see no more air bubbles. If you have a large syringe, simply subtract the amount of alcohol from the amount you started with and that is the volume of your chamber. If you have a small syringe as I did, you will have to track how many times you empty the syringe into the chamber, then subtract the what remains in the syringe after the final injection and add it all together.