Race No. 4
Bosch Spark Plug Grand Prix Presented by Toyota
Nazareth Speedway — Nazareth, PA
April 24-26, 1998
Saturday Individual Practice Report
| pos | car | driver | chassis engine tire | laptime | gap to leader | gap to next | mph | km/h | 110% rule |
| 1 | 33 | Patrick Carpentier | 98I/108E/F | 18.800 | 0.000 | 0.000 | 181.149 | 291.469 | n/a |
| 2 | 17 | Mauricio Gugelmin | 98I/108E/F | 18.825 | -0.025 | -0.025 | 180.908 | 291.082 | n/a |
| 3 | 26 | Paul Tracy | 98I/HRK/F | 18.841 | -0.041 | -0.016 | 180.755 | 290.834 | 100.15% |
| 4 | 1 | Alex Zanardi | 98I/HRK/F | 18.857 | -0.057 | -0.016 | 180.601 | 290.588 | 100.24% |
| 5 | 12 | Jimmy Vasser | 98I/HRK/F | 18.888 | -0.088 | -0.031 | 180.305 | 290.111 | 100.40% |
| 6 | 5X | Gil de Ferran | 98I/HRK/G | 18.894 | -0.094 | -0.006 | 180.248 | 290.019 | 100.43% |
| 7 | 6 | Michael Andretti | 009.c/XD/G | 18.899 | -0.099 | -0.005 | 180.200 | 289.942 | 100.46% |
| 8 | 99 | Greg Moore | 98I/108E/F | 18.922 | -0.122 | -0.023 | 179.981 | 289.589 | 100.58% |
| 9 | 8 | Bryan Herta | 98I/XD/F | 18.930 | -0.130 | -0.008 | 179.905 | 289.467 | 100.62% |
| 10 | 11 | Christian Fittipaldi | 009.c/XD/G | 18.935 | -0.135 | -0.005 | 179.857 | 289.391 | 100.65% |
| 11 | 27 | Dario Franchitti | 98I/HRK/F | 19.047 | -0.247 | -0.112 | 178.800 | 287.689 | 101.25% |
| 12 | 40 | Adrian Fernandez | 98I/XD/F | 19.067 | -0.267 | -0.020 | 178.612 | 287.387 | 101.35% |
| 13 | 7 | Bobby Rahal | 98I/XD/F | 19.110 | -0.310 | -0.043 | 178.210 | 286.740 | 101.58% |
| 14 | 16 | Helio Castro-Neves (R) | 98I/108E/G | 19.129 | -0.329 | -0.019 | 178.033 | 286.456 | 101.68% |
| 15 | 20 | Scott Pruett | 98I/XD/F | 19.131 | -0.331 | -0.002 | 178.015 | 286.426 | 101.69% |
| 16 | 9 | JJ Lehto (R) | 98I/108E/F | 19.132 | -0.332 | -0.001 | 178.005 | 286.411 | 101.70% |
| 17 | 24 | Robby Gordon | 98I/RV8C/F | 19.148 | -0.348 | -0.016 | 177.857 | 286.171 | 101.78% |
| 18 | 18 | Mark Blundell | 98I/108E/F | 19.165 | -0.365 | -0.017 | 177.699 | 285.918 | 101.87% |
| 19 | 10X | Richie Hearn | 009.c/XD/F | 19.265 | -0.465 | -0.100 | 176.777 | 284.433 | 102.41% |
| 20 | 19 | Michel Jourdain Jr. | 98I/XD/F | 19.270 | -0.470 | -0.005 | 176.731 | 284.360 | 102.43% |
| 21 | 25 | Max Papis | 98I/RV8C/F | 19.388 | -0.588 | -0.118 | 175.655 | 282.629 | 103.06% |
| 22 | 21 | Tony Kanaan (R) | 98I/HRK/F | 19.402 | -0.602 | -0.014 | 175.528 | 282.425 | 103.13% |
| 23 | 36 | Alex Barron (R) | 98I/RV8C/G | 19.490 | -0.690 | -0.088 | 174.736 | 281.150 | 103.60% |
| 24 | 3 | Andre Ribeiro | P98/108E/G | 19.725 | -0.925 | -0.235 | 172.654 | 277.800 | 104.85% |
| 25 | 34 | Dennis Vitolo | 98I/XD/F | 19.728 | -0.928 | -0.003 | 172.628 | 277.758 | 104.87% |
| 26 | 98 | PJ Jones | 98I/RV8C/G | 19.743 | -0.943 | -0.015 | 172.497 | 277.547 | 104.95% |
| 27 | 3X | Andre Ribeiro | P98/108E/G | 19.781 | -0.981 | -0.038 | 172.165 | 277.014 | 105.15% |
| 28 | 77 | Arnd Meier | 97I/XD/G | 19.949 | -1.149 | -0.168 | 170.715 | 274.681 | 106.04% |
| 29 | 2 | Al Unser Jr. | P98/108E/G | 20.541 | -1.741 | -0.592 | 165.795 | 266.765 | 109.19% |
| 30 | 10 | Richie Hearn | 009.c/XD/F | 23.252 | -4.452 | -2.711 | 146.465 | 235.662 | 123.60% |