Piquet leads every lap at Detroit from pole position, but there are two very interesting facts that make his performance all the more remarkable. His pole position lap is achieve on the second of a two lap run in final qualifying on Saturday afternoon. At the wheel of his qualifying sprint car, the team's spare, Piquet scores round to grasp pole position, first in 1'41"290 and, on his second lap, in 1 min 40.980 sec. Not only is this more than four seconds faster than the best Friday time, establish by Nigel Mansell’s Lotus 95T, but it may well be even quicker has the Brabham not laps into three cylinders a couple of corners before the end of the lap. We can’t quite believe it, smiles Brabham designer Gordon Murray, because when Nelson came into view coming up to the chicane before the pits, we could hear that the engine sounded sick, so we thought we might have lost the quick lap. It had dropped a valve, in fact, so he was lucky to scrape across the line, let alone set the pole position time. One is bound to wonder whether Piquet will have broken the 1'40"0 barrrier if the engine has survived the complete lap intact. Thus, Nelson is able to line up on pole position, flank as he has been at Montreal, by Alain Prost’s McLaren MP4/2. On the inside of the second row sat Nigel Mansell’s Lotus 95T, the English driver having again proves remarkably adept during practice on this somewhat acrobatic circuit, and alongside the Lotus sat Michele Alboreto, his Ferrari 126C4 again sporting the electronic Marelli/Weber fuel injection system which has been progressively develops during the course of the season but which is’t race since Kyalami.