It's a good thing that you are not FI'd yet. 13.2 afr at redline = BOOM!!
My afr at redline is about 11.5 but I am Vortech supercharged. If you go with a charger, you definitely want to address that. Most people go with the UTEC (ems) because anyone with a laptop can basically tune it. It's a good ems. I'm running the HKS FCon iS. It can only be tuned by an authorized HKS tuner (GT Motorsports tuned my car) which is why more people don't run this ems. But it offers much more resolution than the UTEC for more precise tuning. Also the UTEC has issues with hot starts, the HKS ems doesn't. That's not really that big of a deal though. So I would say go with the UTEC or if you have access to an HKS authorized dealer, go with the HKS FCon iS. If you are going with a built engine and bigtime power, the HKS FCon VPro is the ticket. The new Haltech ems is supposed to be pretty good also.
