I’m going to be rather blunt. I really am trying to help you out, even if I do come across as harsh.
Stop what you’re doing and go back to spend time on learning/UNDERSTANDING the very, very basic concepts/mechanisms/theories behind gasification; the various types of gasifiers; and how various factors affect what happens in the engine and visa versa.
Once you’ve done that, THEN start working on what might be the best plan to accomplish your goals. Your only real options for succeeding in gasification are:
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Pay cash for someone else to know everything that needs to be done to design/build/run an appropriate gasifier. @Matt at Vulcan Gasifiers Vulcan Gasifier can happily sell you a “turn-key” (put wood in, turn a key, use the power generated) system, but I think that his cheapest turn-key models start at over 10,000$ USD. I don’t know if Arvid @tritowns and his International Supply company still sell complete systems (and lessons on how to run them); same for Stephen Abbadessa @sabbadess and his company NSR (Almost all money; very little knowledge needed; the “upfront” hard work is taken care of, but still needs a fair amount of ongoing work to keep things going)
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You can learn enough to be able to copy someone else’s proven system for an applicable engine and build it (one still needs to learn a lot, but very doable as shown by all the members here). Several offer plans for free/cheap (comparatively). The most obvious example being the @Wayne Keith system with proven applications/versions for a Dodge 8L V10 Ram, Dodge 5.2L (318CI) V8 Dakota, and a medium sized tractor, as well as “educated guesses” on how to change the design to fit many other applications. Other examples are @glgilmore and his “SimpleFire” and “Gilmore Gasifier” (both charcoal); @k_vanlooken has several proven charcoal systems. This is obviously the suggested option. (Moderate amounts of money needed to get tools, supplies, materials; moderate amounts of knowledge, which is slowly learned by lots of reading and discussing with others; moderate amounts of hard work)
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One can learn massive amounts of info/engineering/science, (either by having others teach you, or spending a LOT of time/energy/resources/sweat to learn yourself, such as @Wayne did over the period of at least a decade or two) to design a working system oneself. (Still have to have money to buy/have tools and materials; massive amounts of knowledge; and massive amounts of hard work.) I am incredibly grateful for the likes of @Wayne, Imbert, Gary Gilmore, and all the many other true pioneers that chose this option, and have put in that effort and allowed the rest of us to walk forward on their shoulders. My hat is off to them. Thank you, all. o7