Maybe I am reading this Dyno Graph wrong but it looks to me like it starts running rich at 4.75 rpm. Anyways tuner says its lean and I need a new fuel pump (which I probably do anyway) and he would be able to keep the air fuel around 13 or lower. I thought the higher the number the more fuel. Am I wrong?

Vortech V2
42# Injectors
LT

 

you are wrong...that is SUPER lean....

 

I would have not even gone that high on the pull, IMO it is a miracle you did not pop the motor... 16.5 AFR at ~5400 is dangerous on a NA motor, it is 10X worse on a FI motor...

 

thats what I was gonna say but had to step away from my computer. I don't know how that motor survived that pull. I would not go WOT in your truck until you get this fixed.

 

was it a clamp on wideband? thats kinda what my old graph looked like cuz it kept popping of my exhaust.

 

im really surprised it made that much power under those conditions. way way way to lean. all across the board

 

Its a wideband. We actually ran it three times on there. I guess i got lucky. Hopefully Ill make a lot more to the wheels with a pump

 

WOW, even at the richest part of the run, its still way too lean.

 

Think a walbro 255 will fix it?

 

dammmmmm, that is lean as ****...AFR should be in at 11.5 area...

who tuned it? since i see ARD on the top of your dynosheet on the previos one u showed.. tell them to step away from the computer