Hi Doug
I must have missed your post getting the three gardens tilled in, getting new fencing and a clothesline up. AND, mowing, mowing, mowing!! Finally a couple of windy stormy days. Good.
I have been following with interest on the Gasification Lists these folks working through attempting to get motor grade fuel gas out of their $400.USD Chinese gasification stove. You can hear the skepticism in Kevin Chisholms voice there (he sells these as stoves on the East coast) trying to advise them. But  now having seen two working gasifiers and hanging out with the guys over at the Yahoo WoodGas group for the last few months, now that they have added a cyclone and are going to go with additional cooling/filtration I DO think with religious fuel preparation they may be able to get a good 2 hour usable gas run out of this before it plugs up with ash. Others experimenting with the GEK gasifier kits are finding ash cleaning out needed at  5-10 hours run time or 100-200 lbs/50-100 kg fuel usage intervals. Over in the Yahoo WoodGas group photo section a fella posted cut opened up pictures of the Chinese cooler filter box showing the baffle chambering and water cooling coils along with pictures of the ChangFa engine he was going to fuel. Somebody over there posted a gasified Chinese Engine running claim. Two of the fellas  there Mike LaRosa and Wayne Keith have the reputations of being able  "to make gas out out of a straight piece of pipe".

Doug, you like engines. On on one of the woodgas sites there has been a running thread about what would make the IDEAL small gasified engine. Lister CSs and ChangFA got thrown in the first three posts. The Redstone was out by the tenth post. The big singles were declared to be: Too heavy, Too unportable, Too hard to source - US EPA importation concerns. The ChangFa clones were called too "clanky". A REAL problem is these small slow speed engines will not pull an even enough suction through the cyclones to spin out the gunk. And to even create enough suction on a 6/1 Listeroid to pull the gas through the reactor/filtering train restrictions the throttling loss is making the  output power unusable. Need a 3600 RPM screamer or a multicylinder has been the consensus. After running a gauntlet of Arrows, GM/Cummins diesel/gas conversions to Izuzu/Kubota refer units to Vtwin Onan, Briggs, Honda gas engines finally an Australian fellow  pointed out Doug Williams was now recommending an Indian 3 cylinder factory converted gaseous 1500/1800 RPM unit:
http://www.prakash-india.com/product/biomass-genset.htm
Looking through their complete Renewable Energy section under "About Biomass" and see they will even supply a licensed gasifier to match.

Now knowing  that I am using a "non-ideal engine" with my Listeriod, but using the acumulated advice of the from the Yahoo WoodGas fellas and others, I now know I will probably have to power BLOW through a  gasifier, use a big pulse dampener filterchamber chamber, and INSULATE the reactor  to conserve and concentrate process heat. Their words have been:  "(either) Suck it's socks off! (or) Blow it's brains out!", "Getter' good and HOT and keep 'er HOT", "Have you melted the nozzles or reduction tube yet? (When you do you will know) You are getting close. (Then)Use better metal"

Regards
SteveU.