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Originally Posted by WannaWagon
Only problem I can see is that the period when you really need to heat the WVO is when the engine is cold, therefore no coolant flowing through the radiator yet. That's why most WVO kits and homebrew designs use electric heaters, or they tap into coolant flow from the engine block.
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you're right about that. That's why the last 2 pictures are really just meant to feature the nice little heat exchanger that's inside the bottom of the radiator. Rather than making a heat exchanger (which is at least some work, I've designed and/or made several), perhaps these would work well..The outside could be wrapped in electrical heat tape and insulated. Or exhaust gases could be ducted through the ID of the heatv exchanger and be controlled with a heat riser type mechanism. This might be a great use for the EGR system. Think about it, an EGR valve is provided variable vacuum to allow exhaust gases to pass through and heat up the WVO tube. Once desired temperature is reached, the EGR could be modulated to maintain desired temperature.
