![]() It's not so much your set up its today's fuel, unless your running 112 - 118 octane gas. Not disagreeing with you, just trying to learn and understand. I guess the return could become a bit of a problem if it has too much pressure, but I can't imagine that the tank would have more that a few PSI of pressure. If my current system pressurizes due to lack of a vent, what will happen? The pressure could force fuel through the fuel lines, but my fuel line wants to be pressured at 43 PSI anyway. This way, if some fuel is traveling up the line the air can "burp" itself past the fuel and exit, and the fuel can eventually drain back.Ĭan you help me understand why capping a vented line will make me blow up? My 70 is an original California car, and it used a non vented cap, a special tank and a sealed expansion tube that sat in the trunk. ![]() If I modify my vent line I was going to both lengthen the line as well as put a small surge tank into it where the vent enters at the bottom and exits at the top. ![]() I do also run a full return line with the Fuel Injection back to the tank. So first, to answer your questions / suggestions: I have a vented 73/74 style cap on it now.
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