http://www.openecu.org/index.php?title=Speed_density&action=history Revision history for this page on the wiki en MediaWiki 1.13.1 Thu, 20 Aug 2026 19:44:29 GMT http://www.openecu.org/index.php?title=Speed_density&diff=1528&oldid=prev <p></p> <p><b>New page</b></p><div>== Speed Density ==<br /> <br /> Speed density is a tuning methodology where fuel and/or timing is determined by the speed (RPM) of the engine and the density (bar, psia, etc) of the intake air. <br /> <br /> Many aftermarket [[standalone]] or [[piggyback]] systems use a speed density system, as well as older cars. However, most modern factory vehicles use [[mass air flow]] systems. <br /> <br /> === Advantages ===<br /> <br /> ??<br /> <br /> === Disadvantages ===<br /> <br /> Speed density requires tuning many maps for consistent results, such as air temperature compensation and engine volumetric efficiency. Manifold pressure sensors do not react quickly to rapid changes in pressure.</div> Thu, 07 Sep 2006 04:15:22 GMT Freon http://www.openecu.org/index.php?title=Talk:Speed_density