Lotus Europa Community
Lotus Europa Forums => Garage => Topic started by: My S1 on Wednesday,February 15, 2023, 08:59:40 AM
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Thought I would go through the fuel system and replace the sender and lines and add an in-line filter but I was aghast to see this wild two step playing out between 1/4" and 1/8" fuel lines. Checking vintage magazine article pictures and the shop manual I found that my situation is exactly as it left the factory. Is this a brilliant example of masterful hydraulic engineering prowess that I am too feeble to grasp? Why do the inside diameters fluctuate so? Would I be a fool to simply run 1/4" lines throughout and possibly reduce the pressures or increase volume?
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The plastic lines are not 1/8. They are thin wall so more like 3/16". Regardless, it worked. However, they are all VERY old and should be replaced without a doubt or delay. Running the 1/4" hose is a fine idea. Use ethanol-happy fuel line. Be careful how it is routed and support it where needed.
I would also plumb back in the plugged off third line. It's a metered feed back to the tank to keep the fuel circulating and cool as the engine compartment can get very hot.
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Interesting, thanks.
There is a "T" piece on the line from the pump to the carb presently. Not sure if it is original. Is one return outlet better than the other for the function mentioned?
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Just noticed in the shop manual that the "T" is original. We must have picked up a less than original fuel pump sometime in the past 56 years.
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Some Renault pumps have the third port, some don't.