I'm no tuning expert by any means but I would check your car for other issues. 14.4:1 under load at WOT seems really lean. I realize you have an Enthalpy tune but that doesn't mean something else isn't up with the car. (i.e.- no filter on the MAF.)

 

safc is not a crappy way to tune, sending out your ecu and a list of crap you have is. your a/f's are way lean for being under load, i would be a little more worried about that.

 

Wow so you would take a stock bottom end car with just a piggy back system that doesnt touch timing or even regulate 780cc injectors properly to 20psi and feel safe? The Enthalpy tune which I hate sr owners do it all the time its tuned for the maf, the injectors and what boost you are at and even adjust timing and able to move up rev limit and remove factory speed limiter with out a standLONE. What you miss read what is the a/f are fine until it breaks up under boost is around 11.5 until it breaks up thats when it hits 14+, its not like nissan has hondata...but i guess all I have is crap on my car...lol

 

Breakup/misfire under boost is almost always spark related. What else could it be if you're looking at 11.5AFRs. Of course the AFR's shoot up when you're misfiring. The Oxygen sensor is reading more oxygen because you're not combusting it. Check you spark plugs and gap, then make sure your coilpacks aren't taking a dump.

How big are the corrections you're running on the SAFC? You know that RS Enthalpy is located just on the other side of the Bay. If your tune is so bad why don't you tell us what's wrong and we'll fix it. For free. On a dyno. So why do you hate the Enthalpy tune?

 

i have a feeling his plugs are gapped out at 032 or larger. probably pulled them straight from the box and threw in. also, an SAFC on an enthalpy ecu? bad news bears. make sure you have the same number under 'in' and 'out'. chances are, the ecu is already mapped for a Z32 maf and the safc is fucking it up more.

ive never had ANY issue with an enthalpy ecu. anytime anyone does, its usually due to the car owners ignorance/negligence

 

And if it's not, we provide nearly endless email support and will send out new ROMs if necessary. If people haven't figured out from the use of pronouns, I work for RSE.