The newly resurfaced Hungaroring has led to an increase in speeds; Dillmann's pole time being 1.3s quicker than Alex Lynn's 2015 GP2 pole time.
"I did the pole here in GP2 [in 2013], and the year after I was on the front row, so I think I was always quite fast here and liked it," said Dillmann.
"It is really tricky here, because we don't have just Michelin rubber down.
"There is a lot of different [types of] rubber on the track compared to a World Series by Renault event.
"Every lap we do the track feels quite different. It changes so much from the beginning to an end of a session - it's almost like a drying track."
Dillmann is also cautiously optimistic that he will not suffer a repeat of the poor starts that blighted his efforts in round one at Aragon a week ago.
"I had a good practice start on Friday, but it was the same in Motorland; once I got to the grid the bite points moved massively," he said.
"We have changed everything on the clutch, so I hope we have solved it."
Aragon race one winner Louis Deletraz, who jointly leads the drivers' championship with Panis, again finished leading rookie for Fortec in third.
Friday pacesetter Johnny Cecotto Jr took fourth for series newcomer RP Motorport.
In a repeat of qualifying at Aragon, Matthieu Vaxiviere again led the way at the mid-way point of the half-hour session, only to slide back in position on his final new tyre run.
The SMP Racing driver finished the morning in fifth ahead of Dillmann's AVF team-mate, Force India Formula 1 Friday practice driver Alfonso Celis Jr.
Matevos Isaakyan held a place in the top-three entering the final minute of action, before being demoted to seventh, ahead of Charouz-run Lotus racer Roy Nissany, whose formative motorsport years were spent in Hungary.
The 2015 Formula Renault 3.5 season will be notable for being the last with the French company's backing but also produced a worthy champion in Oliver Rowland. PETER MILLS evaluates this year's crop of drivers
Last year's field was extraordinary and hard to match, but the Formula Renault 3.5 grid will still have plenty of talent this season. Glenn Freeman runs through the field ahead of this weekend's season opener
Landing the Fortec seat that took rising star Robin Frijns to the 2012 FR3.5 title was already a good sign for Stoffel Vandoorne. Then McLaren took him under its wing. Peter Mills tells Vandoorne's story so far