FIA President Jean Todt "does not expect any new manufacturers to join" Formula 1 from '21, "despite proposed changes being made to the engine regulations," according to Jonathan Noble of MOTORSPORT. A revamp of the power unit rules -- to make engines louder, cheaper and less complicated -- "could be signed off ahead of the Singapore Grand Prix following discussions in the F1 Strategy Group." While an initial idea of a "radical overhaul" of the rules was "wound back," a "series of tweaks" are still being considered. Asked about the prospect of a new manufacturer joining F1, Todt said that "one party -- which is understood to be Porsche -- had been serious but had now suggested it was not going to green light a project." Todt: "There was some demonstration of interest from one, who said to us we are not in a situation to commit for 2021 but, what is very important for us, is to know exactly what will be the regulations, because there could be a strong interest in the future." Todt added that the "most important thing for him is that F1 appears to be heading to a deal that will ensure Mercedes, Ferrari, Renault and Honda are all happy to continue" (MOTORSPORT, 9/6).