Actually, there is good information here about how running catless and/or with high flow headers affects the car, a/f ratio, tune, etc.
I still think "Any otherwise stock SRT-10 with cat deletion or high flow headers will run rich unless the ECU is tuned."
I might be wrong but I'll need some dyno sheets to convince me.
Cheers.
Ok, last post here I promise! (will try)
Exhibit A - Stock SRT dyno results X A/F mixture
Exhibit B - Stock SRT minus cats, plus you put a POTATO in the exhaust pipe.
since the dyno sample sensor is placed at the exhaust tip, exhibit B WILL BE LEANER. Why?? because even with less flow because of the potato
the cats are not there to burn the excess fuel, therefore there will be more oxygen which means less burned fuel, which the computer assumes as "leaner" but the truth is that the amount of fuel and air dumped in/out of the combustion chamber was the same on both cases.
If this is not clear, I give up!!!