What is my compression ratio (static)?
What is my compression ratio (static)? I have a 402 from Texas-Speed with -10cc pistons and 64cc chambers.
How much "down in the hole" is the piston at TDC, and how much volume would that displace? Lets call this Vdh.
Also, I need the volume of the head gasket. Lets call this Vhg. I do not recall the thickness.
So far I have:
CR = [825 + 10 + 64] / [10 + 64] = 12.15 which is way to high.
However, I need the following:
CR = [825 + 10 + 64 + Vdh + Vhg] / [10 + 64 + Vdh + Vhg] to accurately calculate the static compression ratio.
How much "down in the hole" is the piston at TDC, and how much volume would that displace? Lets call this Vdh.
Also, I need the volume of the head gasket. Lets call this Vhg. I do not recall the thickness.
So far I have:
CR = [825 + 10 + 64] / [10 + 64] = 12.15 which is way to high.
However, I need the following:
CR = [825 + 10 + 64 + Vdh + Vhg] / [10 + 64 + Vdh + Vhg] to accurately calculate the static compression ratio.
Typically they are out of the hole ~.007" stock. TSP seems to use GM MLS gaskets on their longblocks, which are .051" thick, so I am assuming they do the same. You should have a build sheet that came with your engine to tell you all of this, or TSP may have it on record for you if you contact them.
I have TSPs build sheet for this short block. Being a short block, there is no mention of head gasket thickness. I can not remember what I used, but they were highly recommended at the time, which is now 2 years ago.
KCS: I believe that you have given me the missing volumes. Thank you.
KCS: I believe that you have given me the missing volumes. Thank you.
