Romain Grosjean has warned Renault that Haas have them in their sights for the 2019 season.
Renault clinched best of the rest in the Constructors’ Championship battle ahead of Haas and their rivalry went up a notch following the Italian Grand Prix.
With the American outfit breathing down Renault’s necks, the Enstone lodged a complaint with the FIA, asking them to investigate them running an illegal floor.
Grosjean was eventually disqualified from the race classification, something that still irks him even now.
“I don’t think it is a great sportsmanship move,” Grosjean told Autosport about Renault’s protests.
“But yes, we were scaring them, which is good. They should be [scared] for the future.”
Yet Grosjean knows that there is room for much further improvement at Haas, especially the rate of development for new parts.
“There are few things [we can improve],” he added.
“One example is that we don’t produce parts, so we need to manufacture them outside and sometimes it takes a bit too long.
“That is one example that I can give out of a few, but that is one. When it would take three days [for them], to our team to do it it maybe takes three weeks.
“Like the floor, we didn’t have the time to change it for Monza, that was the only thing.
“The performance gain is zero. Absolutely zero, zero, but we just didn’t have the time to do it for Monza and Renault played on it.”
These necessary improvements are far from being new information, with Grosjean saying that team boss Guenther Steiner is aware of the changes that need to be implemented.
“Guenther is well aware,” he said.
“You know, he understands a lot of things and that is great to have.
“We talk very often, but he is aware of the things that we need to improve and definitely it is something that we’re working on.
“Part of the rest is just a growing process, more performance you want, faster you want to be, better things to go.”