I will love to hear your thoughts on the JB4 on the Ecoboost! I am thinking about the JB4 also for my car that comes in next month. Just no real world experience with it. I had a COBB on my 2008 sti back in the day. I was learning towards the COBB but hear the tune for the 2021 wasn't that great.Hey everyone, I'm taking delivery of a new 2021 Ecoboost this week. I too was surprised to find relatively few mentions of the Burger JB4 here. I have used these to great effect on a couple of other cars like BMW, Mini, and an Infiniti Q50.
I've never had an issue whatsoever, so when I started looking around for various mods I want to do, the JB4 was the first thing I looked for and was happy to see the 2.3L is supported. That is likely the route I'll go. The device is more sophisticated than a "chip", it can actually use the OBDII port in addition to sitting as a middle man between sensors in the engine bay. Anyway, I am not affiliated with Burger in any way, but just wanted to share my past experience.
My second choice would be COBB. I had a 2003 WRX years ago when COBB was just starting out in Salt Lake City, and Trey tuned my car for a stage 2 turbo setup. He was a wizard back then, so I'm sure their latest offerings are that much better. My hesitation there is the car has 7 miles on it, so not sure I'm ready to flash the ECU quite yet. I'm willing to "pay to play", but I also don't want any other unrelated failures to get denied a warranty claim. The JB4 can be removed in 10 minutes with no trace.