Arrows driver Derek Warwick told that at times his valve was opening at just 2.6 Bar (a loss of approximately 280 bhp (209 kW; 284 PS)) while Benetton's Thierry Boutsen told that the two valves on his Ford V6 were both opening at different levels and both well below the 4 Bar limit.
O piloto de Arrows Derek Warwick dixo que ás veces a válvula abríase apenas a 2,6 bar (unha perda de aproximadamente 280 CV (209 kW; 284 PS)) mentres o piloto de Benetton Thierry Boutsen dixo que as dúas válvulas do seu Ford V6 abrían en momentos diferentes e ambas moi por baixo do límite de 4 bar.