1989 Engine Specifications and Availability
|
RPO |
Cyls-CID (Liters) | Injection/ Trans | Horsepower @ RPM | Torque @ RPM (Ft. Lbs.) |
Compression Ratio | # Produced* |
| LO3 (E) | 8-305 (5.0L) | TBI | 170 @ 4400 | 255 @ 2400 | 9.3:1 | 46,715 |
| LB9 (F) | 8-305 (5.0L) |
TPI | 195 @ 4000 (AT) | 295 @ 2800 face="Arial" size="1">(AT) | 9.3:1 | 8,925 |
| 220 @ 4400 (MT size="1">) | 290 @ 3200 face="Arial" size="1">(MT) | |||||
| w/ G92 | 230 @ 4600 face="Arial" size="1">(MT) | 300 @ 3200 face="Arial" size="1"> (MT) | ||||
| B2L/L98 (8) |
8-350 (5.7L) |
TPI | 230 @ 4800 | 330 @ 3200 | 9.0:1 | 12,370 |
| w/ G92 | 240 @ 4400 | 345 @ 3200 |
* Total number produced under RPO, not limited to
IROC-Z production only.
NOTE: Slightly higher Horsepower and Torque
specifications due to G92 option package which included dual catalytic converters.
TBI=Throttle Body Injection; TPI=Tuned Port Injection;
CID=Cubic Inch Displacement; HO=High Output, AT=Auto Transmission, MT=Manual Transmission.
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