"I think it's going to be the biggest Junior World Championships we have organised," said Bourdarias, who is in Auckland to finalise details of the tournament.
"Two years ago in South Africa we had a record-breaking tournament crowd - 40,000 in the final - it was massive. But I'm quite confident that we will break this record.
"As in any event, the success depends on the home team. In South Africa why did we break records? Because South Africa won it."
Bourdarias said he was also extremely positive about the interest from European broadcasters, who have not been put off by New Zealand's time difference.
The biggest 15s tournament outside the World Cup, it also traditionally features some of the best rugby, with the open game preferred to kicking for territory.
"For us it's very important. It's also very important for the participating unions because under-20 is a pathway for the players. All the talent they have identified three or four years previous ... it is the last stage [before becoming full internationals]."
In the case of the All Blacks, 17 of the squad on last year's European tour played in the Junior Worlds.
In what is a concentrated tournament played at three venues - Pukekohe and North Harbour with the finals at Eden Park - spectators will be able to watch three pool matches a day at a single venue.
Tickets have been priced to suit families at from $5 for children and $10 for adults.