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Race report
IMSA Detroit

IMSA Detroit: Bourdais, van der Zande win after four-way scrap

Chip Ganassi Racing Cadillac drivers Sebastien Bourdais and Renger van der Zande scored their second IMSA SportsCar Championship victory of the season at Detroit's Belle Isle on Saturday.

#01 Chip Ganassi Racing Cadillac DPi: Renger van der Zande, Sebastien Bourdais

Bourdais, who laid on another clinic in qualifying, drove an exemplary opening stint before van der Zande brought the car home for its second successive win on the challenging 2.35-mile temporary circuit - the Dutchman having paired with Kevin Magnussen last year. But this was no walk in the park.

The Dallara-based Cadillacs were slightly favoured over the more nimble Acuras going into the weekend, despite the Caddys being saddled with an extra 15 kgs of ballast under IMSA’s Balance of Performance regulations.

The top three cars – one Cadillac and two Acuras – were separated by a scant 0.127s in qualifying, while after a breathtaking 73 laps of green-flag racing the top four – three Cadillacs and one Acura – were blanketed by just 1.663s. This was a cracker.

Bourdais looked to have messed up his chances of the pole when he slapped the wall hard at the exit of Turn 8, but incredibly the car sustained no serious damage and he was able to dip fully half a second beneath Juan Pablo Montoya’s track record to secure his fourth pole of the season.

Unlike at Long Beach, where an early mistake caused him to wage a sensational comeback, Bourdais was flawless as he eked out a margin of just over two seconds on Tom Blomqvist’s Meyer Shank Acura by the time they both headed for the pit lane after 36 laps, exactly halfway through the 100-minute race. Alex Lynn, in the second Ganassi Cadillac, was a further 18 seconds adrift when he pitted on the same lap to hand over to Earl Bamber.

Ricky Taylor had stayed with the two leaders before abandoning the Wayne Taylor Racing Acura’s fuel-saving tactics after 28 laps and committing instead to a two-stop strategy for himself and Filipe Albuquerque. Critically, the Action Express Cadillac team had made the same decision much earlier, with team newcomer Olivier Pla (in for Tristan Nunez) completing only 10 laps before being relieved by Pipo Derani.

The Brazilian set a blistering pace and actually led for three laps before making his own final stop at the earliest possible opportunity – with 40 laps in the books and 44 minutes remaining. Derani rejoined in fifth, 34 seconds behind van der Zande, but continued to set an astonishing pace – including a new lap record only 0.059s slower than Bourdais’ pole – as he quickly reduced the deficit. With 20 minutes remaining, the top four were together.

Bourdais and van der Zande took their second street track win of the year after conquering Long Beach

Bourdais and van der Zande took their second street track win of the year after conquering Long Beach

Photo by: Michael L. Levitt / Motorsport Images

Van der Zande managed his pace perfectly to secure the victory, while Oliver Jarvis (in for Blomqvist) tracked his every move. Mere yards behind, Derani muscled his way past Bamber for third at Turn 1 on lap 60, only for Bamber to repay the favour at Turn 3 with three laps remaining. Sadly, Derani’s hard work came to nought when his car later failed to meet the minimum weight requirement.

Taylor/Albuquerque were promoted to third, but still narrowly ceded the championship points lead to Blomqvist/Jarvis with only four races remaining.

The GTD contest was almost as hard fought with Foyt IndyCar driver Kyle Kirkwood and Ben Barnicoat scoring the VasserSullivan Lexus team’s first victory of the season by 2.2s over the Heart of Racing Aston Martin of Roman De Angelis/Ross Gunn.

De Angelis got the jump on polesitter Kirkwood at the start and pitted one lap before the Lexus - but Kirkwood's strong in-lap in clear air meant Barnicoat emerged ahead of Gunn by three seconds, a lead he maintained to the finish.

Behind, Paul Miller Racing's BMW M4 GT3 completed the podium in third with Madison Snow and Bryan Sellers.

IMSA Detroit race results (73 laps):

Cla Class Num Driver Chassis Time Gap
1 DPi 01 Netherlands Renger van der Zande
France Sébastien Bourdais
Cadillac DPi 1:40'45.972  
2 DPi 60 United Kingdom Oliver Jarvis
United Kingdom Tom Blomqvist
Acura DPi 1:40'46.370 0.398
3 DPi 02 New Zealand Earl Bamber
United Kingdom Alex Lynn
Cadillac DPi 1:40'46.755 0.783
4 DPi 31 France Olivier Pla
Brazil Pipo Derani
Cadillac DPi 1:40'47.635 1.663
5 DPi 10 United States Ricky Taylor
Portugal Filipe Albuquerque
Acura DPi 1:41'01.914 15.942
6 DPi 5 France Tristan Vautier
United Kingdom Richard Westbrook
Cadillac DPi 1:41'30.860 44.888
7 GTD 17 United Kingdom Ben Barnicoat
United States Kyle Kirkwood
Lexus RC F GT3 1:40'59.369 6 Laps
8 GTD 27 Canada Roman De Angelis
United Kingdom Ross Gunn
Aston Martin Vantage GT3 1:41'01.632 6 Laps
9 GTD 1 United States Bryan Sellers
United States Madison Snow
BMW M4 GT3 1:41'05.181 6 Laps
10 GTD 12 United States Frankie Montecalvo
United States Aaron Telitz
Lexus RC F GT3 1:41'07.517 6 Laps
11 GTD 32 United States Mike Skeen
United Kingdom Stevan McAleer
Mercedes AMG GT3 1:41'43.696 6 Laps
12 GTD 39 United States Robert Megennis
United States Jeff Westphal
Lamborghini Huracan GT3 1:41'54.081 6 Laps
13 GTD 16 United States Ryan Hardwick
Belgium Jan Heylen
Porsche 911 GT3 R 1:42'06.679 7 Laps
14 GTD 96 United States Robby Foley
United States Bill Auberlen
BMW M4 GT3 1:41'39.568 8 Laps
15 GTD 51 United States Ryan Eversley
Australia Aidan Read
Acura NSX GT3 1:34'28.378 11 Laps
16 GTD 57 United States Russell Ward
Switzerland Philip Ellis
Mercedes AMG GT3 25'59.157 56 Laps

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