Sigh. PeterC you are not all wet by any means.
But you are still comparing fuel apples with oranges fruits with with whole wheat bread.
250 horsepower is only used in real world common road automotive for burst acceleration for a limited short time. Fella’s I have actually known pulling a continuous 250 horsepower for 45 minutes or more with gasoline big block towing/RVing pulling grades towing have glowing red exhaust manifolds and lots of engine life shortened valve and piston problems later. Just the same as with the 400-1000 miles racers. So see, this is why this kind of power desire is viewed as just another hole in your pocket $$$$ racing. Most of us just happy fine growing, grinding, cooking eating whole wheats, and oats and saving the money to pay the Caesar taxes to keep what we have.
Wanna’ demand/use 250+ horsepower hour after hour for heavy truck line haul, field Ag tractoring, marine fishing? These fellows have learned you have to use bigger mass, less heat stressed, more efficient conversion (less waste heats!!) diesels. Cummins 220, 335, 350 and 400 horsepower engines. Detroit 8V72’s, 8V92’s and Caterpillar, and Mack equivalents as on road used engines. The actual continuos power gasoline users of 250+ horsepower were piston aircraft. THEY in the 30’s-60’s avanced the art and science of doing this with piston IC engines more that all of the bracket racing users combined IMHO.
The 1916-18 Liberty engine was an OHC, V-12, dual magneto engine.
Produced woodgas motor fuel is more like if you are directly using out of the ground well head gas, landfill gas, 1920’s gasoline, kerosene’s and fuel oils, and Bunker C. NOT purified, dewatered and refined todays gasoline blends, LPG, CNG, and manufactured supplied barrels of spec ethanol or refinery supplied purified barrels of methanol.
Really man. Do follow up on the sources I put up. For woodgas there is even much more info out there for power and efficiencies in Prahtash, Cummins/India, Waukesha, and GE/Jenbacher engines data bases for CR, ignition timing, pressure induction in addition to the CGPL/IISc and Vessa Mikkonen book I referred you all to already for those wanting to try and performance woodgas “running” before they have even gone thru flare “crawling” to ANY operating IC engine woodgas “walking” stages.
Then you will learn how they evoled to deal with soots, a strange whitish/yellow crystal induction build up from this relatively easy to DYI make, but unrefined, motor fuel.
Seriously, woodgas will only reward Doing, using it; not talking, not speculating.
Submitted Most Respectfully