Thanks to its long straights, Monza requires the lowest level of downforce of the season.
The car requires fairly high levels of downforce in Bahrain, so a lot of the rear wing is used.
A setup using a higher level of downforce to increase speed in the slow, twisty inner part of the circuit would result in a fast lap.
"Sector 1 is dominated by the level of downforce and fuel loads, while Sector 3 is dominated by drag," said Xevi Pujolar, the chief race engineer at the Williams team.
"They have a decent level of downforce and a decent-looking front wing.
I think in these days the wet or dry set-up is dominated by the aerodynamics, so you can change the level of downforce.
However, some of the more conventional cars were able to match this level of downforce; the works Toyota TS-010s had a claimed maximum downforce of over 9500 pound, for example.
The BT46B generated an immense level of downforce by means of a fan, claimed to be for increased cooling, but which also extracted air from beneath the car.
The car's lack of straightline speed, due to a combination of undeveloped aerodynamics, the high level of downforce, and the low power of the engine, would restrict the car's racing career even further.
The J2X-C had bodywork that is more reminiscent of modern Le Mans Prototypes than a conventional Group C car, but the engine proved too weak for the level of downforce, and this, coupled with the fact that Allard Holdings were liquidated during the car's development, severely restricted the J2X and prevented it ever reaching its potential.
