is it necessary to adjust tune after Long tube headers?

[rt4drizzt]

I have a 2007 charger rt with the 93 perf cai tune, i am having long tube headers installed and will eventually (if not right away) have a cmr tune done but wanted to know if i should adjust fuel or spark with the predator before i get the cmr ?

[johan]

Yes it is recommended that you add some fuel for the long tubes, 5-10% in the whole rpm range.

[Texsrt4]

So how do you go about adding fuel across the entire rpm range? I have a customer who has a CEL stating that it is running too lean and we need to add approximately 10% of fuel across range so that his fuel trims get within range. Problem being that I cannot find the adjustment in the controller for fueling other than WOT fueling. I know on the last FORD truck I tuned with the Predator allowed me to adjust non-wot fueling. This dodge wont. Is the software different or do we need to update his software?

[Mike_Levy]

Without the CMR software you cannot adjust non-WOT fueling. Only WOT can be changed.

Also, what mods does the guy have? My computer thought it was running lean, but it was because the O2 sensor wasn't getting the proper data due to a poor connector on the extension. Turned the cat black and smelled like gas for days, even after we fixed it.

[Texsrt4]

Hmmmmm...I will have to go take a look and see if he has o2 extensions. Thanks Mike