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  1. gtrack

    Compression ratios?

    Steve, the NASA thing was just a euphemisn. Bearing in mind Im working in a 14ft square wooden shed! Incedently, what does everyone use as fluid to measure the cc? I use an old barrell of red x thin fuel additive purely because I have boxes of the stuff and it seems to give me the same result...
  2. gtrack

    Compression ratios?

    Guys, thanks for the responses. Think i`ll try all of them in one way or another and see what happens just out of interest. I guess static compresion means little anyway in the grand scheme of things once the motor is hot and running at xxxx amount of revs, but I couldn`t get that damn 1 inch...
  3. gtrack

    Compression ratios?

    Basically thats what I need to know. Does it matter where I take the `1 inch` measurement from as long as all the piston is below the deck? But then again, if you take it from the crown aren`t you just measuring the area around the dome and not what the dome itself displaces? Arent I looking...
  4. gtrack

    Compression ratios?

    Guys, thanks. its a 4 valve jobby. The compression height is I think taken from the left hand flat, it is closer to the top of the barrell by about 1mm. Thanks
  5. gtrack

    Compression ratios?

    Sorry to open up a much debated question. Please bear with me. I underatand how to obtain a ratio, but I am stuck on finding the piston dome volume. Easy if you have a dish or a dome only using the 1 inch down method BUT........ I have a piston which has a dome, different depth valve reliefs...

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