Originally Posted by BrianBrave
I ran a rock steady 12.5 AFR from 3,500 RPM all the way up to 6,200 RPM. I have 6K+ semi-hard miles on my SRT since with no signs of peppering on the plugs.
Actually the plugs look really good!!
I'll have an opportunity to Re-Dyno my SRT once I've completed my IAT mods to see if anything has changed. I will probably use the same dyno that SRT6 Dan used and save me a trip to LA.
Give Erick @ LET a call - I know he was running way lean with 185mm Pulley on his MB and I ran way rich with the 185mm. I provided him the Chrysler part # and the Bosch part # for the injectors on my SRT.
What gap are you running? I had the colder #7 ngk plugs at a stock .039 with 12.5 afr's. I went back and lowerd them all to .025 which is a huge decrease(what MD SRT6 is running 11.2's in the 1/4 on with nitrous and 181 pully and nitrous). I ran the car again and the freaking a/f went up to 13-13.4, wtf!
Brian, do you see your a/f being greatly affected by outside temperature? As in .5-1.0 higher a/f for every 10 degrees drop in temperature.