Web16 de mai. de 2006 · Defining and understanding compression for your pump gas street motor- Engine Masters. ... This means the dynamic CR, at about 8.5:1, has dropped … 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 grass. In an … Ver mais When we talk about compression, this should be more accurately defined as static compression ratio. This is literally the ratio of the … Ver mais 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 controlling detonation. All engines can benefit … Ver mais 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 … Ver mais 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 … Ver mais

Discussing Compression Ratio And Pump Gas …

Web25 de mar. de 2015 · I ran this nearly identical setup on pump gas too, never had a problem. Water temp was always 120-130 though. Oil temp was 190-200 when running fairly hard. I wouldn't do anything over 11:1 on pump gas with aluminum heads. 10.1 with iron heads and nothing more than 36º of timing. Web17 de jan. de 2009 · 489ci, pump gas 10.46 @ 124.79mph This is another hot bbc setup that likely has a lrg cam reducing cyl pressure some,likely running plenty of gear ,stall if … csm booting

pump gas 460 and compression ratios 460 Ford Forum

Web21 de jun. de 2007 · This engine will think it is running with 6.17:1 compression and will be happy with 80-octane fuel. As a general rule, the best available pump gas will work with … Web9 de mar. de 2007 · If you 'zero' deck the block and use -12cc dish pistons on, the 383, you will have about 10.3 static CR. My set up uses a 'zero' deck block, Speed Pro hyper … Web9 de jul. de 2001 · 10,475 Posts. #3 · Jul 5, 2001. I don't think it is possible to say a certain compression ratio is the absolute limit for an iron headed SBC. 9.5 to 1 is the rule of … eagle scout reference request form