The Zero R Racing Corvette CR6 GT1 of Dave Basu and the Race 4 Slovakia Attack Praga R4 of Martin Sedlak and Dick Kvetnansku shared the race wins as the Dutch Supercar Challenge supported Superleague Formula at Assen last weekend.
In the opening one-hour race, Basu followed the Carworld Motorsport Mosler of Niels Bouwhuis in the first stint and was trailing the pole sitter by seven seconds at the compulsory pit stop.
Bouwhuis handed the Mosler over to Milko Tas, but almost immediately the team had problems as the car stuttered down the pit lane. Tas managed to rejoin the track but stopped several times on his out lap before eventually pulling off to retire.
The Mosler’s expiry gifted Basu a big lead at the head of the field and, despite a couple of spins late on as he tyres went off, he still boasted a 55.483-second advantage as he took the chequered flag.
Rudolph Racing secured a 1-2 finish for Covette as the CR5 shared by Roger and Niels Grouwels came home in second place, with Jan Versluis completing the podium in his VEKA Racing Ferrari F430 GT2.
Diederik Sijthoff was fourth in his Speedtec Motorsport Dodge Viper, while fifth overall and first in the Supersport I category was the JR Motorsport BMW M3 Silhouette of Bert van der Zweerde.
The Ford Mondeo V6 MWs of Nelson van der Pol (BRL Associates) and Jacky van de Ende (Van Berlo Racing) completed the SSI podium places.
The second race started behind the Safety Car as the heavens opened, but when racing got underway, Basu looked in control again.
As the rain ceased as the pit stop window approached, Basu held a comfortable advantage but then saw his race ruined as he was handed penalties for separate Safety Car and Pit Lane infringements, dropping him well down the order.
Sijthoff was also given a penalty later on for ‘dangerous driving’ while Rick Abresch’s Mad & Daring Team Corvette also went off while fighting for the lead, leaving Grouwels clear ahead of Sedlak, who had stormed through the field from 22nd on the grid.
Sedlak made his race-winning move on Grouwels with just three laps to go to take an impressive victory and leave the Rudolph Racing Corvette in second again at the finish.
The Brinkmann Motorsport Audi R8 LMS of Ardi van der Hoek and Robert de Graaff climbed from towards the back of the grid to claim the final podium position after Peter Versluis crashed his Mosler late on.
Sijthoff recovered from his earlier penalty to clinch fourth place with Henk Thuis fifth in his Ferrari F430 GT2.
In the Supersport I class, van der Zweerde crashed heavily after just ten laps while leading and Wolf Nathan fought his way to the win in his FE Racing Porsche 997 GT3. The Carworld Motorsport Porsche of Erol Ertan and Rene Wijnen was second, while van der Pol scored a second podium of the weekend in third.
In two separate Supersport II and Sport class races victory was shared by the Team Riwal Racing, Seat Leon Supercopa of Ferry and Robin Monster and the JR Motorsport BMW E46 GTR of Marco Poland and Andre de Vries.
Sport class honours went the way of John van der Voort and Joost van den Akker (Powermotorsports, BMW 130i) in race 1 and the JR Motorsport, BMW E36 M2.5 of Richard van den Bos and van der Zweerde in race 2.
Dutch Supercar Challenge results – Round 4. Assen
Race 1 (GT & SSI)
1 (GT) Dave Basu, Zero R Racing, Corvette CR6 GT1, 35 laps, 1:02:14.058
2 (GT) Roger Grouwels / Niels Grouwels, Rudolph Racing, Corvette CR5 GT1, +55.483
3 (GT) Jan Versluis, VEKA Racing, Ferrari F430 GT2, +1:42.206
4 (GT) Diederik Sijthoff, Speedtec Motorsport, Dodge Viper SRT10, +1 lap
5 (SSI) Bert van der Zweerde, JR Motorsport, BMW M3 Silhouette, +1 lap
6 (GT) Rick Abresch, Mad & Daring Team, Corvette CR6 GT1, +1 lap
7 (SSI) Nelson van der Pol, BRL Associates, Ford Mondeo V6 MW, +2 laps
8 (SSI) Jacky van de Ende, Van Berlo Racing, Ford Mondeo V6 MW, +2 laps
9 (SSI) Daniel Schryvers / Dick van der Donk, Kuipers Racing, Ford Mondeo MW V6, +2 laps
10 (GT) Ron Marchal / Jean Glorieux, Marchal Racing, Aston Martin DBRS9, +2 laps
11 (SSI) Carlo Kuijer, Divitec Racing, Solution F TC10 GTC 3.5V6, +2 laps
12 (SSI) Wolf Nathan, FE Racing, Porsche 997 GT3, +2 laps
13 (SSI) Martin Webb, Team Webb, BMW E46 GTR, +2 laps
14 (GT) Rene Snel, RS Racing, Porsche 911 GT2, +2 laps
15 (GT) Henk Thuis, Driver, Ferrari F430 GT2, +2 laps
16 (SSI) Barry Maessen, Van Berlo Racing, Ford Mondeo V8 MW, +3 laps
17 (SSI) Erol Ertan / Rene Wijnen, Carworld Motorsport, Porsche 997 GT3, +3 laps
18 (SSI) Wilfred Herder, DDG Motorsports, Aston Martin Vantage E85, +3 laps
19 (SSI) Tom Webb / James Webb, Team Webb, BMW E46 GTR, +3 laps
20 (SSI) Charlie Frijns / Rob Frijns, Carworld Motorsport, Porsche 997 GT3, +3 laps
21 (GT) Peter Versluis, Mosler Europe, Mosler MT900 R GT3, +4 laps
22 (GT) Dick Kvetnansku / Martin Sedlak, Race 4 Slovakia, Attack Praga R4, +4 laps
23 (SSI) Dirk Schulz, Topper Team, Porsche 997 GT3, +4 laps
24 (SSI) Bert Moritz / Patrick Moritz, Moritz Racing, Marcos Mantis, +4 laps
25 (GT) Ardi van der Hoek / Robert de Graaff, Brinkmann Motorsport, Audi R8 LMS GT3, +4 laps
Not classified
(GT) Barry van Elk, Blueberry Racing, Attack Praga R4, 20 laps
(GT) Milko Tas / Niels Bouwhuis, Carworld Motorsport, Mosler MT900R GT3, 19 laps
(SSI) Bob Stijhoff, Speedtec Motorsport, Marcos Mantis, 9 laps
(GT) Alex van’t Hoff, Mad & Daring Team, Mosler MT900R GT3, 8 laps
(GT) Nol Kohler / Danny Werkman, Mad & Daring Team, Opel Omega V8 Star, 7 laps
Race 2 (GT & SSI)
1 (GT) Dick Kvetnansku / Martin Sedlak, Race 4 Slovakia, Attack Praga R4, 23 laps, 47:40.943
2 (GT) Roger Grouwels / Niels Grouwels, Rudolph Racing, Corvette CR5 GT1, +5.303
3 (GT) Ardi van der Hoek / Robert de Graaff, Brinkmann Motorsport, Audi R8 LMS GT3, +11.719
4 (GT) Diederik Sijthoff, Speedtec Motorsport, Dodge Viper SRT10, +20.692
5 (GT) Henk Thuis, Driver, Ferrari F430 GT2, +28.912
6 (GT) Barry van Elk, Blueberry Racing, Atta GK Prada R4, +33.064
7 (GT) Ron Marchal / Jean Glorieux, Marchal Racing, Aston Martin DBRS9, +52.752
8 (GT) Jan Versluis, VEKA Racing, Ferrari F430 GT2, +1:03.742
9 (GT) Milko Tas / Niels Bouwhuis, Carworld Motorsport, Mosler MT900R GT3, +1:05.742
10 (GT) Dave Basu, Zero R Racing, Corvette CR6 GT1, +1:23.092
11 (GT) Peter Versluis, Mosler Europe, Mosler MT900 R GT3, +1:25.833
12 (GT) Alex van’t Hoff, Mad & Daring Team, Mosler MT900R GT3, +1:40.338
13 (SSI) Wolf Nathan, FE Racing, Porsche 997 GT3, +1:40.451
14 (SSI) Erol Ertan / Rene Wijnen, Carworld Motorsport, Porsche 997 GT3, +2:10.127
15 (SSI) Nelson van der Pol, BRL Associates, Ford Mondeo V6 MW, +1 lap
16 (SSI) Martin Webb, Team Webb, BMW E46 GTR, +1 lap
17 (GT) Rene Snel, RS Racing, Porsche 911 GT2, +1 lap
18 (SSI) Barry Maessen, Van Berlo Racing, Ford Mondeo V8 MW, +1 lap
19 (SSI) Dirk Schulz, Topper Team, Porsche 997 GT3, +1 lap
20 (SSI) Carlo Kuijer, Divitec Racing, Solution F TC10 GTC 3.5V6, +1 lap
21 (SSI) Bob Stijhoff, Speedtec Motorsport, Marcos Mantis, +1 lap
22 (GT) Rick Abresch, Mad & Daring Team, Corvette CR6 GT1, +3 laps
23 (SSI) Daniel Schryvers / Dick van der Donk, Kuipers Racing, Ford Mondeo MW V6, +4 laps
Not classified
(SSI) Bert Moritz / Patrick Moritz, Moritz Racing, Marcos Mantis, 13 laps
(SSI) Charlie Frijns / Rob Frijns, Carworld Motorsport, Porsche 997 GT3, 11 laps
(SSI) Bert van der Zweerde, JR Motorsport, BMW M3 Silhouette, 10 laps
(SSI) Jacky van de Ende, Van Berlo Racing, Ford Mondeo V6 MW, 5 laps
(SSI) Wilfred Herder, DDG Motorsports, Aston Martin Vantage E85, 4 laps
(GT) Nol Kohler / Danny Werkman, Mad & Daring Team, Opel Omega V8 Star, 2 laps
(SSI) Tom Webb / James Webb, Team Webb, BMW E46 GTR, 2 laps
Race 1 (SSII & SP)
1 (SSII) Ferry Monster / Robin Monster, Team Riwal Racing, Seat Leon Supercopa, 33 laps, 1:03:02.978
2 (SSII) Marco Poland / Andre de Vries, JR Motorsport, BMW E46 GTR, +31.366
3 (SSII) Bob Herber / Gerrit Meijer, Saker Europe, Saker GT, +31.650
4 (SSII) Wim Jeuris / Ronald Vetters, RSTT Race Service, Saker GT, +1:40.598
5 (SP) John van der Voort / Joost van den Akker, Powermotorsports, BMW 130i, +2:03.701
6 (SSII) Ron Braspenning / Eline Braspenning, Braspenning Racing, BMW E46 4d, +1 lap
7 (SSII) Marcel Norbart, Passie Racing, Seat Leon Supercopa, +1 lap
8 (SP) Aart Bosman, ABW Racing, Lotus Exige, +1 lap
9 (SSII) Ted van Vliet / Henk Thuis, Van Vliet Afbouw / Intrax Racing, BMW E92 M3, +1 lap
10 (SP) Peter van Vliet / Nico van Vliet, Speedtec Motorsport, BMW M3 E46, +1 lap
11 (SSII) Bas Schouten, Bas Koeten Racing, Nissan 350z FlexFuel, +1 lap
12 (SP) Guillaume Schulz, Team TDM, Lotus Exige Cup, +1 lap
13 (SSII) Luco Hornsveld / Harold Wisselink, Penucci Racing, Seat Leon Supercopa, +2 laps
14 (SSII) Jasper Bijl / Robbert Bijl, Gravity Racing, Seat Leon Supercopa, +2 laps
15 (SP) Rob Nieman, Spirit Racing, Renault Clio RS 2.0 16V, +2 laps
16 (SP) Edward Grouwels / Roger Grouwels, Rudolph Racing, Renault Clio RS 2.0 16V, +2 laps
17 (SSII) Christian Dijkhof, Brax Racing, Sear Leon Supercopa, +2 laps
18 (SP) Nico Been, Driver, Renault Clio RS 2.0 16V, +2 laps
19 (SP) Frank Bedorf / Machiel Kars, Spirit Racing, Renault Clio RS 2.0 16V, +2 laps
20 (SP) Jan Bart Kolsteren, Braspenning Racing, BMW E46 330i, +2 laps
21 (SP) Leon Zappeij, LZ Racing, BMW M3 E36, +3 laps
22 (SSII) Koen Bogaerts / Mark van der Aa, European Staffing Racing, BMW 132 GTR, +4 laps
23 (SSII) Luc de Cock, Deldiche Racing, Lotus 2 Eleven GT4, +6 laps
24 (SP) Kim Troeyen / Marc Goutziers, AT Motoren, Focus Sport, +6 laps
Not classified
(SSII) Nick Aerts, Van de Pas Racing, Ford Mondeo, 23 laps
(SSII) Ronald van Loon, V-Max Racing, BMW E46 M3, 23 laps
(SP) Richard van den Bos / Bert van der Zweerde, JR Motorsport, BMW E36 M2.5, 22 laps
(SP) Erol Ertan / Rene Wijnen, Carworld Motorsport, Renault Clio III Cup, 17 laps
(SP) Eric van den Munckhof, Van de Pas Racing, Focus Sport, 14 laps
(SSII) Michael Verhagen, Honda Racing Verhagen, Lotus Exige GT3, 13 laps
(SSII) Pieter van Soelen, JR Motorsport, BMW E46 Coupe GTR, 0 laps
(SSII) Jan van der Kooi, Team Lotus Racing, Lotus Exige GT3, 0 laps
Race 2 (SSII & SP)
1 (SSII) Marco Poland / Andre de Vries, JR Motorsport, BMW E46 GTR, 25 laps, 47:53.938
2 (SSII) Jan van der Kooi, Team Lotus Racing, Lotus Exige GT3, +2.247
3 (SSII) Ferry Monster / Robin Monster, Team Riwal Racing, Seat Leon Supercopa, +19.159
4 (SSII) Bob Herber / Gerrit Meijer, Saker Europe, Saker GT, +33.866
5 (SSII) Koen Bogaerts / Mark van der Aa, European Staffing Racing, BMW 132 GTR, +57.712
6 (SSII) Marcel Norbart, Passie Racing, Seat Leon Supercopa, +58.222
7 (SSII) Wim Jeuris / Ronald Vetters, RSTT Race Service, Saker GT, +1:04.116
8 (SSII) Ron Braspenning / Eline Braspenning, Braspenning Racing, BMW E46 4d, +1:11.347
9 (SSII) Jasper Bijl / Robbert Bijl, Gravity Racing, Seat Leon Supercopa, +1:32.554
10 (SSII) Ronald van Loon, V-Max Racing, BMW E46 M3, +1:36.704
11 (SSII) Christian Dijkhof, Brax Racing, Sear Leon Supercopa, +1:38.153
12 (SP) Richard van den Bos / Bert van der Zweerde, JR Motorsport, BMW E36 M2.5, +1 lap
13 (SSII) Bas Schouten, Bas Koeten Racing, Nissan 350z FlexFuel, +1 lap
14 (SSII) Ted van Vliet / Henk Thuis, Van Vliet Afbouw / Intrax Racing, BMW E92 M3, +1 lap
15 (SSII) Luco Hornsveld / Harold Wisselink, Penucci Racing, Seat Leon Supercopa, +1 lap
16 (SP) Guillaume Schulz, Team TDM, Lotus Exige Cup, +1 lap
17 (SP) Eric van den Munckhof, Van de Pas Racing, Focus Sport, +1 lap
18 (SP) Aart Bosman, ABW Racing, Lotus Exige, +1 lap
19 (SP) Peter van Vliet / Nico van Vliet, Speedtec Motorsport, BMW M3 E46, +1 lap
20 (SP) John van der Voort / Joost van den Akker, Powermotorsports, BMW 130i, +1 lap
21 (SP) Leon Zappeij, LZ Racing, BMW M3 E36, +1 lap
22 (SP) Rob Nieman, Spirit Racing, Renault Clio RS 2.0 16V, +1 lap
23 (SP) Edward Grouwels / Roger Grouwels, Rudolph Racing, Renault Clio RS 2.0 16V, +1 lap
24 (SP) Frank Bedorf / Machiel Kars, Spirit Racing, Renault Clio RS 2.0 16V, +1 lap
25 (SP) Nico Been, Driver, Renault Clio RS 2.0 16V, +1 lap
26 (SP) Erol Ertan / Rene Wijnen, Carworld Motorsport, Renault Clio III Cup, +2 laps
27 (SSII) Luc de Cock, Deldiche Racing, Lotus 2 Eleven GT4, +2 laps
28 (SP) Jan Bart Kolsteren, Braspenning Racing, BMW E46 330i, +3 laps
29 (SP) Kim Troeyen / Marc Goutziers, AT Motoren, Focus Sport, +3 laps
30 (SSII) Nick Aerts, Van de Pas Racing, Ford Mondeo, +4 laps
31 (SSII) Pieter van Soelen, JR Motorsport, BMW E46 Coupe GTR, +6 laps
Not classified
(SSII) Leo Kurstjens, AT Motoren, Focus Sport, 7 laps
(SSII) Michael Verhagen, Honda Racing Verhagen, Lotus Exige GT3, 3 laps
Next round: 26 June, Spa-Francorchamps
Watch Dutch Supercar Challenge highlights from Assen on Saturday 25 Juney at 6pm (BST) on Motors TV.
Andy Wilkinson
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