Compression Ignition Addict
Join Date: Apr 2007
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Bio is more viscous. It has less BTU's so you will need about 10% more fuel delivery with it. It is a good solvent and can free up gunk. Bio itself can have contaminants or be poorly converted and be even thicker. All these will result in more pressure drop in your fuel system. Our stock fuel systems are marginal in the fuel pressure area from the factory. I have been told that Bio and steel fuel tanks are not a good combination (if you happen to have a steel tank).
You will not really see performance issues with pressures under 45 psig, but the fuel pressure needs to be there to "cushion" the injectors. Fuel pressure below 45 psig is the #1 cause of injector failure.
The most common aftermarket fuel delivery systems are Air Dog II and FASS. Several different models to choose from depending on your horsepower requirements.
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