Formula 1's plans to deliver cars in 2017 that are around five seconds per lap faster than now are on course, Motorsport.com has learned, following tweaks agreed with teams.
The F1 Strategy Group outlined plans earlier this year to create more challenging and more spectacular cars as part of a wide scale overhaul aimed at making grand prix racing more exciting.
Teams have since been trying to reach a consensus on a set of rules that will allow the leap in speed but without it proving either too expensive or detrimental to the racing.
Various proposals were put on the table, and a more conservative option that was preferred by the FIA was not given the green light because it was felt that it would not deliver enough of a lap time benefit.
That left teams working on an idea based around a more aggressive proposal from Red Bull, which has now been refined following the most recent Technical Regulations Working Group after the Japanese Grand Prix.
This will involve an 1850mm wide front wing - which is 200mm wider than the version currently used – and a rear wing that is 950mm wide and 800mm high.
The diffuser design will also be similar to how F1 cars were back in 2010, which should allow improved performance from the floor.
One change that has been approved is for the tyres to be slightly narrower than first proposed, because of concerns that the higher drag produced by the original concept offsetting all aerodynamic gains.
So the idea now is for the tyres to be 300mm wide at the front and 400mm wide at the rear. Current tyres are 245mm wide at the front and 325mm wider at the rear.
A further meeting to ratify the proposals is scheduled for next week, where it is hoped that any last-minute concerns that have come to light following analysis back at the factories in recent days can be aired.
If the rules are given the support they need, then they can be approved by the FIA World Motor Sport Council later this year.