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Ha, ha. A surge tank is a small holding tank for fuel which is narrow and tall, that you pump fuel to from your main fuel tank, and then a fuel pump delivers fuel from the surge tank to your engine. Because it's narrow and tall the fuel pickup isn't starved around turns like the oem tank.
I'm getting fuel starvation with the oem fuel tank at certain tracks even with 1/2 tank of gas. So to keep a full tank I'll need lots of e85. My STi race setup can start a session with only 5 gallons in the tank because of the surge tank.
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