http://dansdata.blogsome.com/2007/03/26/the-78-scale-chevrolet-and-other-stories/ the blog that is not dansdata.com Sun, 08 Nov 2009 04:59:49 +0000 http://wordpress.org/?v=1.5.1-alpha http://dansdata.blogsome.com/2007/03/26/the-78-scale-chevrolet-and-other-stories/#comment-855 Fri, 30 Mar 2007 12:40:43 +0100 http://dansdata.blogsome.com/2007/03/26/the-78-scale-chevrolet-and-other-stories/#comment-855 I've heard of two sleazy tricks being used by car manufacturers to pass emissions testing or get a good fuel economy figure. The first trick was to program the engine controller to recognise the sequence of engine speeds/road speeds etc. in the standard fuel economy test and switch into super-frugal mode. The second trick was to have two fuel/ignition maps, one which made the engine run efficiently and the other which made it pass emissions testing. The state of the drivers side door switch determined which map was used. The reason for this was that emissions testing was done on a dynamometer, during which time the dyno operator would sit in the drivers seat with the door open. I've heard of two sleazy tricks being used by car manufacturers to pass emissions testing or get a good fuel economy figure.
The first trick was to program the engine controller to recognise the sequence of engine speeds/road speeds etc. in the standard fuel economy test and switch into super-frugal mode.
The second trick was to have two fuel/ignition maps, one which made the engine run efficiently and the other which made it pass emissions testing. The state of the drivers side door switch determined which map was used. The reason for this was that emissions testing was done on a dynamometer, during which time the dyno operator would sit in the drivers seat with the door open.

]]> http://dansdata.blogsome.com/2007/03/26/the-78-scale-chevrolet-and-other-stories/#comment-842 Tue, 27 Mar 2007 17:16:43 +0100 http://dansdata.blogsome.com/2007/03/26/the-78-scale-chevrolet-and-other-stories/#comment-842 Classic, Such a shame that racing rule makers fear "innovation" so much that they seem ban all the most interesting (http://en.wikipedia.org/wiki/Lotus_56) developments. Classic, Such a shame that racing rule makers fear "innovation" so much that they seem ban all the most interesting (http://en.wikipedia.org/wiki/Lotus_56) developments.

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