We have never had a good balance, we have been struggling a lot with that, a lot of understeer for me, really struggling with that.
Iswaran added: "The F1 Singapore Grand Prix has generated significant benefits for our economy as well as the Formula 1 franchise".
"So we are very much hoping we get it right, and we get a bit of luck". McLaren plans to use Renault power units for at least the next three seasons.
"The Singapore race is clearly a signature race.it's also our gateway into Asia which is important for our future and our growth", F1 chief Chase Carey told reporters.
During the 90-minute race, "we will be seeing about 10 terrabytes of data float through the system, which makes it the biggest science project on the planet for that period of time, eclipsing even the human genome project", said Ian Rhodes, CEO of McLaren Applied Technologies.
"We had put ourselves at the disposal of the various parties to try and facilitate the best possible outcome for everyone".
"To be a Formula 1 driver for a manufacturer team is an honour", Sainz told the BBC.
F1 drivers have been issued a warning about "heat shock" at this weekend's Singapore GP.
"The first ever night race in this sport is one of the most thrilling events of the year, taking place against the stunning backdrop of Marina Bay".
"Normally your body manages to keep going through the race, but when you get the chequered flag, everything switches off".
Kubica has not raced in F1 since a rallying injury in 2011, but is gearing up for a comeback.