WebApr 5, 2013 · It’s important to make a distinction between static compression ratio and dynamic compression ratio. The static compression is what you measure on an engine stand with a burette and graduated cylinder. ... We recommend VP C-14 for our bracket engines; other suppliers offer gasoline with comparable octane rating. Most racing … http://www.maniacmechanic.com/calculate-required-octane-for-compression-ratio/
What is a safe compression ratio to run in an lsvtec? Honda ...
WebJan 3, 2010 · A 72° ABDC closing would put the DCR at 8.16 which isn't much less than the 8.45 he calculated. The difference is most likely he used the .006" duration numbers … The biggest limiting factor when attempting to increase compression ratio is the threat of detonation. This is defined as uncontrolled combustion that occurs after the spark plug has fired. Think of the combustion process not as an explosion, but rather, more like a brush fire burning across a large field of dry … See more When we talk about compression, this should be more accurately defined as static compression ratio. This is literally the ratio of the volume of the cylinder with the piston at the … See more Of course, too much ignition timing can cause other problems. For modern engines, a three-dimensional timing map based on both load and RPM will go a long way toward … See more Some may be concerned about the iron heads, as there is a concern with enthusiasts that iron heads are more detonation prone than aluminum heads. We actually performed a dyno test several years ago using a … See more This effect can be moderated by other atmospheric conditions. For example, high humidity levels tend to reduce octane sensitivity slightly since the additional water in the air finds its way into the combustion … See more imaging small bowel obstruction
Does Higher Compression Mean More Power? Yes, and Here’s Why.
WebMay 16, 2006 · The optimum intake-to-exhaust ratio could range from as little as 0.75:1 (for a low CR supercharged engine) to as much as 1:0.6 (for a very high-compression naturally-aspirated engine). WebApr 10, 2010 · 9,699 Posts. #2 · Apr 9, 2010. Building a motor to a dynamic compression ratio number just means it will detonate at higher rpm where you won't hear it. 10:1 compression is too high for pump gas, I don't care where you live or how big a cam is in it. At some point in the rpm range that big cam that bleeds off your low rpm compression … WebThe ratio of the cylinder volume at IVC over the volume above the piston at TDC represents the dynamic compression ratio. The DCR is what the air fuel mixture actually “sees” … imaging shortcut