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RonP

?'s About Afr In Different Gears & Changing 5.7 Calid To A 6.1 Calid

So I have always noticed on my logs that as I get into the upper gears my car gets richer at WOT.

 

At VMP in Sept it was fairly warm and my AFR in 1st was 11.5-11.7. It gets progressively lower (richer) as I go down track and  by the time I was in 3rd and even into 4th right before hitting the stripe I was 10.9-11.2.

 

So now its cooling down a lot and I am running tomorrow. yesterday I saw the 1st gear AFR climb into the low 12's and I have a feeling it would be closer to mid 12's at the track. So I am going to add fuel, but I will still have the same issue I believe. Richer as I get down track.

 

Is this common? Not questioning my tune...simply trying to learn this shit and see what others see.

 

Also, as I prepare for the new engine and higher boost and such...Should I have my 5.7 CALID flashed to a 6.1?

 

Does that provide the tuner more ability? is it worth it? and can a dodge dealer do it? I have a good friend at the local one but not sure if he is up on all this.

 

Thanks

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Aside from cat protect causing rich IATs the load changes in the higher gears which cause a change as well.

Thanks Erik,

 

I know the CAT is turned off and I figured it was due tot he load changing, so is it just the way it is? or is there more tuning ability with a 6.1 CALID? Since it looks like all I can do is add or take away fuel in RPM ranges..

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Its just the way it is unfortunately. I will go a hair leaner in first and second on Wendy's car and keep the higher load closer to where I want it in 3rd and 4th.

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