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What if....
you mounted a tank on the exhaust manifold, filled it with water(and alcohol during winter), and ran the fuel line thru it and air intake above it? The tank should have a low pressure relief valve on it and the released steam should be fed into the air intake.
The tank should be a small volumn, so as to heat up quickly. I have yet to figure out how to install a high volumn nurse tank and pump to refill on the fly. But, even if this whole system does go dry, you should still have a low efficiency heat exchanger operating.
At low rpm this should keep air intake and fuel both heated. At higher rpm the air won't be heating so long so a bit of extra power may be derived from the cooler air intake.
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