Sorry guys for the blackout, had a few setbacks the last few days, but now lm back.
Thierry l have mixed thods about hho. Quantity is what concerns me. I dubt 200ml per minute of HHO will do much good in a engine that suks in about 2000l of air per minute... but this is just a guess.
Steve, how does tar react later down stream? My thinking is it must allso crack to a point on contact with hot coals/ash or am l mistakeing?
Anyway, some update; still burning petrol the engine now runs well and smooth agen, no more smoke trugh the crankcase vent, oil stays clean and l measured the compression today being about 11bar on all cyls, wich is a lot better then 10,8,10,7 l measured last time.
I had problems with the woodgas asembly lately, drove well(ish) when cold, then power down and cooling rail temp up. Indicated a airleak in the hot part of the system so l pressurized the asembly and found a big leak on the cyclone fitting. I allso dissasembled the cooling rail, and half the tubes l found it plugged with soot.
So time for a rethink. I have some ideas on changeing the desigh of the whole asembly, top priority make it lighter and with a bigger hopper space. I think doubleing hopper size culd be possible with some modifications.