Asked whether he could feel any extra oomph from Renault’s latest specification, Ricciardo replied: “I do, but we're not talking a massive step yet.
“When you've already got x-hundred amount of horsepower and you get five or 10 extra horsepower, it's not a world of difference.
“You don't really feel an extra kick when you put your foot down.
“But I do feel like sort of top end, at the end of the straight, it just seems to run more, so it has a bit more legs in the last quarter of the straight.”
Ricciardo hopes Renault’s planned upgrade will help further cut the power deficit to the frontrunners.
“Once we get to – at the moment we're talking sort of Montreal - we should have a proper step,” the Australian added.
“And then hopefully I get some whiplash and some good g-forces through my neck!”
Red Bull team principal Christian Horner praised Renault’s progress over the winter after Ricciardo claimed an encouraging fourth-place finish in the 2016 F1 curtain raiser.
The French manufacturer used the fewest engine development tokens ahead of the new campaign - only seven of the 32 available - but managing director Cyril Abiteboul quickly moved to say he still expected to see a step forward in performance during the course of the season.