X Post for the gurus. +40 degrees timing.... RICH

[knguyen]

http://forums.audiworld.com/s4/msgs/2794284.phtml

Please discuss....

[pdq 5oh]

The excessive rich condition is being used to cover up too much timing. 110% injector duty cycle indicates the injectors are too small to be used with this tune up. Is the graph with temps approaching 775* egt? If so, where is the sensor located? This may also be an indicator of your being way over-rich (lots of unburned fuel in the exhaust). You want an AFR around 12:1. Then put in the correct timing curve to avoid detonation.

[Das General]

Damn timing...what gas is this on? I hope this is on 109

104...eh still really high for that octane.