 The 99T was the second Lotus chassis to be fitted with electronic active suspension after the team had experimented with the system on the Lotus 92 used in the first part of the season.The system's benefits of a consistent ride height with no pitch or roll in the chassis came at a cost, as the system added significant weight to the car (approx 25 kg or 55 lb), and also robbed the Honda turbo of approximately 5% of its power (the RA166E was rated at approximately with 1987s 4.0 Bar turbo boost restriction).Ducarouge clawed as much performance back by spending many hours in the wind tunnel to compensate, although by the end of the season Senna was describing the car as nothing more than the previous year's 98T with a Honda engine instead of the Renault.