Steve, while that might work for the car guys, the bike tech folks advise against it in the strongest terms. See the note, for instance, taped to the bike tech trailer wall: "Set a record today? Get your engine measured today!"
A good reason to follow through on this is because they can't/won't measure a blown-up engine. If you set a record and have your motor sealed without being measured, then break it later in the event -- no measurement, therefore not even that first record after all.