View Full Version : How much power can I add to the motor before upgrading injectors?

10-28-2002, 07:02 PM
The rule of thumb for the 89-93 SC and XR7 is not to go past 300 crank HP
without upgrading fuel injectors. The next highest step, 36lb/hour injectors,
should be used up to 350HP. 38lb/hour injectors can be used up to 375HP.
42lb/hour injectors should be used for 375+HP.