<< Prev Page 2 of 2 Ultimately, Cheever would finish in the points a further three times and thanks to two points finishes by Warwick, the team ended the year 7th in the standings. Nevertheless, the drivers could not but be frustrated with the engine and its erratic performance. This was mainly caused by the pop-off valve that regularly cut in early, limiting the engine's output to far less than the 850 bhp normally available.
For what would be the turbo engine's final season, Arrows opted to further developed the existing car into the A10B. Most of the changes were made to suit the revised regulations, which now limited the fuel tank to just 150 litres, down from the 195 litres available in 1987. For the new season, the pop-off valve was also set at 2.5-bar, which reduced the power to just 650 bhp.
Cheever and Warwick were retained and their frustration with the erratic engine continued until the Italian Grand Prix. With the help of a BMW engineer, Mader had finally discovered that the problem could be addressed by simply moving the pop-up valve closer to the turbo. The results were immediate as Cheever and Warwick finished third and fourth respectively at Monza.
Helped by further points finishes throughout the season, a total of 23 points was accrued, which was enough for Arrows to end the year fifth in the standings. The British had never scored as many points and would never come close to match the 1988 results again. As a result, the A10B remains as the most successful Formula 1 car ever produced by Arrows.
With the turbo engines banned for the 1989 season, Arrows upgraded to the A11, which was powered by the latest Cosworth DFR V8 engine. This rarely proved a match for the dominant Honda, Ferrari and Renault engines, and Arrows slipped to seventh in the standings. << Prev Page 2 of 2
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Ultimately, Cheever would finish in the points a further three times and thanks to two points finishes by Warwick, the team ended the year 7th in the standings. Nevertheless, the drivers could not but be frustrated with the engine and its erratic performance. This was mainly caused by the pop-off valve that regularly cut in early, limiting the engine's output to far less than the 850 bhp normally available.