Kudos for thinking outside the box!
I'd say safety would be the primary issue here. A pressurised vessel with gasoline in it is a serious piece of kit. Fuel cut off in a crash would have to be fool proof and completely reliable. Testing would have to be extensive.
What would the advantages anyway? You'd need a compressor to pressurise the tank, which would probably use more power than the fuel pump would in the first place.
Also, if your fuel system uses a fuel return to the tank, how are you going to get the unused fuel back in there?
Good luck with the project!
ollie
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