Hello Ken, it all relates to many factors, piston speed, head cavern design,piston surface temp,timing of course,all versus flame propagation speed. A small "normal" 1500/1800 or even 3000/3600 engine can very well have slower piston speeds than a big oldfashioned longstroke engine.
By the way, have you ever tinkered with the prechamber form in your Lister? Is Jim' s Listeroid DI ? Can' t ask him myself 'cause he doesn' t answer me any more. salut Rolf Am Freitag, 1. Juli 2011 13:29:21 schrieb Ken Boak: > This is an interesting discussion, which tends to make me believe that the > future of woodgas, will be ignited with the use of conventional diesel > engines, modified for spark ignition, rather than the initially more > obvious choice of a gasoline engine. > > If, as suggested that woodgas can be used without knock problems in a stock > diesel engine at a compression ratio of 17:1, then this better than > compensates for the loss of efficiency when used in a gasoline engine. > > As an enthusiastic user of the slow speed Lister type diesel engines, I > hope to be commencing some power tests on woodgas later this year. It > will be interesting to see how woodgas performs at the much slower 600 > rpm of the Lister, compared to the more normal 1500/1800rpm of a direct > drive diesel generator. The Lister being an old design with a relatively > long stroke of 5.5" has a mean piston speed of about 10 feet per second > - how this relates to a modern, "squarer" higher rpm engine I would need > to > investigate. > > > > Ken > _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
