Clio Williams Maxi
The Clio Williams Maxi is a factory evolution of the Clio Williams Gr, a rally car introduced in early 1995 under kit-car rules (Gr. A7K). It was used to represent the brand in various national championships, such as the French Rally Championship in the hands of Philippe Bugalski and Jean Ragnotti, the Belgian Rally Championship with Bernard Munster, and the British Rally Championship with Alain Oreille and Robbie Head. The French and British rally teams also competed in the World Rally Championship.
| Renault Clio Williams MAXI | |
|---|---|
 | |
| Overview | |
| Manufacturer | Renault Sport |
| Production | 1995-1996 with later evolutions |
| Body and chassis | |
| Class | Rally car |
| Body style | 3-door hatchback |
| Related | Renault Mégane Maxi Peugeot 306 Maxi Peugeot 106 Maxi Citroen ZX Maxi Seat Ibiza Kit car Fiat Punto Kit car |
| Powertrain | |
| Engine | 2.0 L Naturally aspirated I4 |
| Transmission | 6-speed manual or 6-speed sequential (7-speed sequential from Megane Maxi can be retrofitted) |
| Chronology | |
| Predecessor | Renault 5 Turbo |
The most notable exterior differences are wider wheel arches to accommodate bigger wheels and wider tracks, different front and rear bumpers, and a carbon fibers rear wing.
Other exterior differences are another bonnet vent for dissipating heat from the engine bay and a fuel cap in a different location. The most commonly used rims were Speedline 2012 "Acropoli Due" and Speedline 2010 (primarily used on the front wheels). The rims were made from magnesium. They were 16 in (410 mm) or 15 in (380 mm) for gravel and 17 in (430 mm) for tarmac stages.
Proflex made the suspension (3-way adjustable), and the track was widened to 1590mm. The Maxi had much thicker anti-roll bars (up to 35mm for tarmac stages). The hubs were made of aluminium and were bespoke items. The rear beam was also modified with thicker ARB and allowed different camber and toe settings.
The brakes were made by Alcon. The front discs were on aluminium bells and were 332mm in diameter with 4 pot Alcon calipers. The rear discs were 266mm in diameter with 2 pot Alcon calipers.
Roll cage and shell reinforcements were done by Matter France.
The F7R engine was tuned by Sodemo, and produced around 250hp in early evolutions (around 275hp for the last evolutions with a de-stroked engine). The main difference to the Gr.A car was the use of individual throttle bodies and even wilder cams. Other differences include a modified head for improved gas flow and a modified block for better cooling. Extremely wild cams with maximum lift of up to 15mm required the use of solid lifters and titanium valves, springs, and retainers. Pistons and rods were made by Pankl. The pistons were a forged "slipper" design, and the rods were of a forged H section with a custom 150mm length to compensate for the different piston compression height. The compression ratio was 12.5:1 and it ran on special racing fuel. The exhaust manifold was a 4-2-1 design and was made from Inconel alloy. The clutch was made by AP Racing.
The transmission was either a 6-speed Sadev manual or a 6-speed RST Hewland sequential gearbox. The Clio Maxi was one of the first, if not the first, rally cars with a sequential gearbox.
The interior featured an instrument panel made by Stack and Magnetti Marelli, and the seats were made by Sabelt or Sparco.
By 1996, when the Clio Williams Maxi's successor came out (Mégane Maxi), 50 cars had been made.
More cars were made from kits and sold directly to the customers.