Originally Posted by ZIPPY


The SRT-4 crowd used to complain about running rich at WOT, and at the time I was acquainted with the development folks so I asked what the deal was.

On that specific car, I was told it was done for lifespan of the catalytic converter


This same reason applies to most efi cars. Run rich at wot to save the cats (and also more fuel during "cat overtemp" mode)

69 Charger. 438ci Gen2 hemi. Flex fuel. Holley HP efi. 650rwhp @7250 510rwtq @5700