The 2008 world champion put the MP4-27 on pole position for both the Australian and Malaysian grands prix, but then failed to have winning pace in the all-important races.
"In qualifying we are very quick but we need to be quicker in the race," Briton Hamilton is quoted by the Sun newspaper. "I don't think we are quick enough."
F1's next stop is in Shanghai mid next month.
"We will have some upgrades for the car, I hope," said Hamilton. "I will go and push the guys to see if we can get some upgrades to try and squeak ahead in the race."
He admitted to being disappointed after the two races so far this season, when the MP4-27's qualifying promise did not power him to wins.
"The main thing is I need to pick up my race pace," Hamilton is quoted by PA Sport.
"I spoke to Fernando (Alonso) and Sergio (Perez) after (the race in Malaysia) and they had lots of understeer whereas I had lots of oversteer.
"Maybe I'm setting the car up too aggressively, so I might make some changes for the next two races," he said.