Quote:
Originally Posted by Gasoline Fumes
Is the float bowl even necessary? People have been using looped returns for WVO systems for years. Often with no additional pumps. If heat's an issue, add some sort of heat exchanger. I'd be more worried about the injection pump due to reduced lubricity of the hot diesel than the injectors.
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I do believe that a float bowl is not necessarily required as I pointed out above.
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Another potential solution would be to use a surge tank of sufficient size and construction to provide cooling of the return fuel. By dumping return fuel into the surge tank the lift pump would automatically replenish the tank as needed. There could be a problem in using a lift pump for this setup related to getting air into the system that would collect in the surge tank creating a problem. It might be necessary to use a small boost pump to deliver fuel to the engine under pressure rather than under vacuum."
I referenced the float as a known good solution I used in a Perkins swap years ago. I'd be reluctant to use in on my Mercedes swap without some sort of cooling system added. Mostly I wanted to prime the pump for thinking about how to setup a system without trying to rig one based on differential flow meters.