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It has never been
case that piston engines are inefficient and they could serve us very well into
Twenty Second Century as soon as we deep six their liquid, slow burn fuel systems. The reasons Charles Pogue never realized
tremendous power potential of his fast burn, 200 mile per gallon Ford sedan, was likely two things. The hot gasoline vapor made with exhaust system heat and inappropriate spark timing for an engine that required
spark to come about eighty crank degrees later than
timing it had as a slow burn factory engine. Combustion performance enthusiasts
world over, know
coldest, densest air/fuel mixture makes
best power. These people can also understand that making peak cylinder pressures when
piston is near
top of
power stroke, only tries to push
crankshaft out of
engine, onto
ground - wasted energy like standing on
bicycle pedal at
very top.
What we want is cold vapor fuel which is much more easily created than Charles’ exhaust heated fuel. The secret is
vaporizing power of vacuum. Success in cold vaporizing has been demonstrated by radio frequency vaporizing chambers. But
piston engine operates on a vacuum system. In
days of carburetors, vacuum drew in
air to
engine’s cylinders and metered
fuel fairly accurately by means of that same vacuum and simple mechanical adjustments to fuel flow.
Modern electronic fuel injection is perhaps
most expensive incremental improvement to slow burn technology in
Twentieth Century. It served multiple purposes. It exchanged a good, simple system, with a slightly better complex system. Computer controls took auto repair out of
realm of backyard mechanics and restricted it to $50 - 70 per hour service centers - a great big bonus for
auto service industry and a big expense to
do -it -yourselfer.
I am no combustion engineer, nor do I wish to become one. I can only say I intuitively expect two horsepower per cubic inch displacement on any four stroke spark engine modified for cold vapor fuel, using an appropriately sized carburetor as would be done on a slow burn engine.
I further expect that a performance modification that would increase
power of a slow burn engine by fifty percent, will increase
power of a fast burn engine by sixty to one hundred per cent. All
common power boosting practices work on fast burn engines better than slow burn. Compression ratios are not critical as
octane of pure vapor is up around 110. A 12 to one compression ratio would be about 9 to 1 at 45 degrees after top dead center, when
spark would occur at full power. While misfire can occur as often as 3 - 4 cycles per hundred on a new V-8 engine, misfires would be very rare with fast burn engines due to
lower compression at ignition and
evenness of a lean air/vapor mixture. The fast burn engine may be supercharged with a draw through carburetor producing
vacuum to operate a fresh air bubbler at
bottom of
fuel tank. If a richer vapor is desired in
bubbler, a racing fuel cell can be used, packed with fuel cell foam, greatly increasing
surface area exposed to liquid fuel, vacuum will readily vaporize. Large metal fuel tanks should be reinforced top and bottom by epoxying bar stock or angle stock, so they do not collapse under vacuum.
Lastly, I would like to mention that fast burn technology is a multi fuel system. With a little experimenting and fine tuning of mixture and spark, a fast burn engine can burn gasoline, alcohol, diesel, kerosene, vegetable oil, propane and liquefied natural gas. The fuel with
greatest latent energy per pound will deliver
best performance and
least powerful fuel will deliver very adequate performance. If you are anxious to try a fast burn conversion, please read my Fast Burn Conversion essay for tips and details for a safe conversion. Here‘s to big, clean, cheap power for
new age!

Freelance writer published on many websites and newspapers.