[stephenpmsfa]

getting ready to do some datalogging and re-tuning. what should my AFR
range be? 2009 5.7 auto, see signature for mods. dont wanna blow nuthin up.....lol

 

[Speedy!]

Around 12.5 at WOT.

 

[spencer60]

...getting ready to do some datalogging and re-tuning...

Didn't see anything in the mods about a wide-band AFR meter though... I'm assuming you put it in w/ the headers, but just making sure since you spec'd a Predator not a Trinity.

 

[HemiSam]

Without an aftermarket AFR sensor, you'll be reading command AFR off the Predator. That's not your actual AFR.

HemiSam

 

[stephenpmsfa]

ah, so with a laptop connected reading live afr isnt really gonna tell me anything huh....im not looking to lean it out, just wanna make sure its not too lean already. which from what i gather the mods i have prolly wont affect it enough to matter?

 

[Speedy!]

ah, so with a laptop connected reading live afr isnt really gonna tell me anything huh....im not looking to lean it out, just wanna make sure its not too lean already. which from what i gather the mods i have prolly wont affect it enough to matter?

No those mods won't matter enough. I thought you had a wideband installed. The CMD AFR is just what the computer tells the injectors to spray, not what the actual AFR is.

I did a Magnaflow cat back and Mopar CAI on mine and did before and after dynos with AFR and it barely changed at all.

 

[Flat Top]

^^^^^^ exactly. Sam, Speedy.