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In a commonrail system (like PSA's HDi) the second fuel pump builds up crazy high pressure, warming the fuel. The part of the fuel which didn't make it to the injectors returns to the fuel tank, and there is a small radiator along the way to make sure that the fuel isn't too hot. I read in technical manual that something like 60-65°C is the optimal temperature.
I wonder if it wouldn't be a hazard to run too hot fuel through the high pressure pump?
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
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[Old] Piwoslaw's Peugeot 307sw modding thread
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