On March 26th, 2006, during the warmup for the Toyota 300 IndyCar Series opener, Carpenter was involved in a brutal crash with driver Paul Dana. Dana died soon after from his injuries; Carpenter was reported to be "awake and alert," and was released the next day suffering only bruised lungs. He returned to the series on April 22 at Twin Ring Motegi. In a rain-affected race in June at Watkins Glen International Carpenter switched to rain tires late in the race while most others stayed on slicks and captured his best IRL finish at the time, a sixth place.
2007 was much like 2006 despite the addition of a third car to the Vision stable. Carpenter crashed out of five of the seventeen races and finished 15th in points, last among the Vision teammates.
| Year | Team | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | Rank | Points |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2003 | PDM | HMS | PHX | MOT | INDY | TXS | PPIR | RIR | KAN | NSH | MIS | STL | KTY | NZR | CHI 13 | FON 13 | TX2 Ret | 27th | 43 | |||
| 2004 | Cheever | HMS 12 | PHX Ret | MOT Ret | INDY Ret | TXS Ret | RIR 16 | KAN 14 | NSH Ret | MIL 11 | MIS 14 | KTY 8 | PPIR 11 | NZR Ret | CHI 11 | FON 12 | TX2 Ret | 16th | 245 | |||
| 2005 | Vision | HMS Ret | PHX 16 | STP Ret | MOT Ret | INDY 11 | TXS Ret | RIR 12 | KAN 17 | NSH 10 | MIL 12 | MIS Ret | KTY Ret | PPIR 19 | SNM 15 | CHI 17 | WGL 14 | FON Ret | 18th | 244 | ||
| 2006 | Vision | HMS DNS | STP INJ | MOT Ret | INDY 11 | WGL 6 | TXS 9 | RIR 8 | KAN 16 | NSH 10 | MIL Ret | MIS 7 | KTY 11 | SNM 12 | CHI 5 | 14th | 252 | |||||
| 2007 | Vision | HMS 6 | STP Ret | MOT 15 | KAN Ret | INDY Ret | MIL 7 | TXS Ret | IOW 6 | RIR 10 | WGL 12 | NSH 13 | MDO 16 | MIS Ret | KTY 7 | SNM 13 | DET 10 | CHI 16 | 15th | 309 | ||
| 2008 | Vision | HMS 5 | STP Ret | MOT1 6 | LBH1 DNP | KAN 10 | INDY 5 | MIL Ret | TXS 9 | IOW Ret | RIR 11 | WGL 17 | NSH 8 | MDO 15 | EDM 13 | KTY 6 | SNM 23 | DET 14 | CHI Ret | SRF2 | 15th | 320 |
| Years | Teams | Races | Poles | Wins | Podiums (Non-win) | Top 10s (Non-podium) | Indianapolis 500 Wins | Championships |
|---|---|---|---|---|---|---|---|---|
| 6 | 3 | 82 | 0 | 0 | 0 | 21 | 0 | 0 |
| Year | Chassis | Engine | Start | Finish |
|---|---|---|---|---|
| 2004 | Dallara | Chevrolet | 16 | 31 |
| 2005 | Dallara | Toyota | 26 | 11 |
| 2006 | Dallara | Honda | 12 | 11 |
| 2007 | Dallara | Honda | 14 | 17 |
| 2008 | Dallara | Honda | 10 | 5 |