Hey guys,
I just got my car tuned this past weekend at Henderson Performance. They seemed really knowledgeable and nice, but I'm a little concerned about the results after browsing through people's dyno results. These guys mostly work w/ vettes and have only done 3 350's up till my G. They said 12.5 to 11.5 is a good range for AFR and anything lower is probably too rich. I see that most peoples dyno AF's are around 11-12. The dyno sheet below shows AF's around 13:1, but we did the tune off my wideband which was showing low 12's high 11's up till redline where it dipped into the 10's. Should I be concerned about this and go in for a retune? The pull was done in 4th by the way.

http://us.share.geocities.com/danieljlau/DSCF0613.JPG

 

Wideband sensor is after the main cats by the way, if that makes any difference

 

why the holy hell would you put the wideband AFTER the cats?

btw, I'd NEVER, EVER go above 12:1 on forced induction.

 

couldn't find a place with good clearance to put in sensor upstream

 

I remembered the guys there actually lowered the AF after that final run because I told them I was going from 93 back to 91 octane later on. I tried a couple runs and its all between 11-12 during boost. I guess I'm safe for now until I go back to 91 octane.

 

link doesnt work buddy

 

wierd, i think you gotta copy the link and paste it in the address for it to work.

 

link still doesnt work

13:1 on a F/I car is wayyyyy too lean...I tune to 11.4-11.8:1

You need to be very cautious with what you are describing here...get a link that works so we can see the dyno and then you'll get some better feedback

TODD

 

Hmmm... i think cause the files too big The dynojet sniffer was reading just under 13 but my aem wideband was reading lower.