Spa’s first DRS zone will be 20 metres shorter this season but the track will still have two zones, unlike Silverstone and Hockenheim.
The first zone, though, down the Kemmel Straight, has been shortened.
Instead of beginning 230 metres away from the exit of Raidillon, it will start 210m away.
“[It’s] circumstances, having a look from previous events like the previous year at that circuit,” Masi explained to RaceFans.net.
“Has it worked? Was it too powerful? Not powerful enough?
“Then the boffins all sit there and crunched data and look at that and then compare it to television and go from there.
“And also the drivers have given their feedback previously.”
The other DRS zone along the start/finish straight remains the same.
“I circulated a document to the teams with basically all the DRS zones for the rest of the year,” Masi added.
“What’s been increased slightly, decreased slightly.
“There’s a couple of them that have been removed from memory.
“The teams all now have that information.”