[quote=ruderunner]Theory on why senders read full during a dry test vs actual use.
We're adjusting the senders and assuming the float will reach the top of the tank.
We're forgetting about air space above the fuel and the fact that the float won't touch the top of the tank in operation.
If someone is in this process, try setting the float for an inch gap from the top of the tank.
Why do you believe there is air space at the top of the tank? IF the filler neck on say a 68-70 Charger is full of fuel, how could there be an air space ?
Whether the neck is full or not, there's still going to be air pockets in the tank. Even the vent lines aren't completely against the top of the tank.
Either way, the test is simple enough to try.
