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Message: <blockquote data-quote="shiroitenshi" data-source="post: 2098672" data-attributes="member: 27518"><p>Actually just sold off my 2L block last month.. so delayed yet again.. :P</p><p></p><p>Compression ratio doesn't give any ideas on exact valve clearance. Depending on how much stroke you have on the block, valve clearance could be a little or a lot. It's actually quite clear from the formula. To increase compression ratio, you can do two things... reduce the CCV, or increase the SWEPT VOLUME.</p><p></p><p>you calculate it using the formula in the excel spreadsheet below.. I made it simple so I can use it and not need to remember stuff.</p><p></p><p>Compression ratio doesn't give ideas about valve clearance. It gives the idea how much air your engine compresses in perfect a perfect 4 stroke engine (which also means that the numbers mean shit, since valve opening and closing timing affects these numbers in reality)</p><p></p><p>And yes, SCR (static compression ratios are ridiculously high so that you don't have poor compression ratio with larger cam durations)</p><p></p><p>The formula is there as well, if you want to do it the old fashioned way with a calculator.</p><p>Do note that the numbers are NOT to be USED for your application.. the CCV you can use, since I got it off c-speed's CR calculator.. piston dome you have to find it out the old fashioned way.. a buret, and a perspex.</p><p></p><p>*post the xls spreadsheet later.. editing out some stuff*</p><p></p><p></p><p></p><p>Sorry again.. I knew I should have measured before shooting my mouth off.. :P</p></blockquote><p></p>

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