Aren’t you forgetting that See More Business & Go Ballistic humped round 12 stone each in 1999. Denman & Kauto 11st 10lbs. How does that equate over 3 miles 2 furlongs on good to soft?
Around a second.
But it’s a pointless question. There is no point in comparing times from different days, let alone different years, without coming up with some sort of adjustment to normalise conditions.