Thats a difficult one to reply to without getting “pedantic” …
Woodgas is “less energy dense” but gasoline comes actually from the same constituents…
Its highly the vacuum / drag restriction and the different flamespeed/burning velocity that requires adjustments to meet the equal power output.
Actual, for USA low RPM engines, woodgas could deliver more flat torque then gasoline could, and they do run so easy/good, that my cheecks still need lemons after the drive with Wayne as in above video clip.
Advancing timing or even retarding timing depends on each , different, observations, can be programmed in ECU / OBD 2 setups.
Same goes for gasmixture, AFR readout/adjustments
Filling degree vs CR and power output…
Valve tuning / timing…
Many things depend on what is actual needed or what is the engine task to do…
With all the combined experience present here on DOW, collect all knowhow, we could and should write a book even multiple books and still not cover all…
Here some pics about different speeds of gas, pressure peaks, CR ratio, timing crank…
Low speed rpm / high torque, needs different settings then higher Rpm
fast acceleration is different from …
Change the gas…
… ( means fill in the blanks)
What works for me on this side of the globe does not mean its perfect suited for your situation and vice versa
But sharing our know how defintivly helps to understand and overcome local problems
If the world population would step down from the desire for fast acceleration and high top speed, more people would choose woodgassification…
Iff you have the readout from an OBD2 then you’l see what is meant: cruising at low fuel flow, accelerating is up to 20 times more…
If your car cruises at 30 Mpg then calculate / build your gasifier to a bit lower Mpg ( about 20 )
Your car will be able to accelerate at the fuel flow of 20 mpg …
Idling will be the lowest value to consider for sizing ( gasflow ) and the consumption rate Idling vs top acceleration = how good your gasifier would have to be…
