Quote:
Originally Posted by gijoe985
I have mpguino for the civic and for the carbureted vehicle I am prepared to drain the gas tank, put in a measured 2 gallons, run a controlled test of driving a specific distance at a steady vacuum reading and then drain the tank to see what we have left.
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I think that can be actually a good idea to use some external small tank with easy to measure amount of fuel. 2 gallons for example. It can be done from a canister maybe? Just be sure that it will be safe, fuel won't be leaking and you'll have some venting pipe to be sure that vacuum won't build up in that tank. And it should be big enough to let you install fuel pump (if VX has pump in the tank). If high pressure pump is external you don't need to be worry about that just put the tank slightly above the high pressure pump.
Try to build something similar to tank that Mythbusters are using in their tests.
I think that will be the most accurate method of measuring FE. I wouldn't trust MPGuino in this case if you want to be sure of the numbers you'll get.