So I've been rocking the JB4 on Map 6 (+7psi) for 10 months now and it's honestly been great. I live in CA so 91 Octane is all we've got available unfortunately. I've been able to beat, keep up with, and surprise a lot of unsuspecting cars. But I've began to notice how inconsistent that the JB4 can be at times. Last night my buddy who owns a bone stock right hand drive MK4 Toyota Supra and I were doing a few roll races. I've beaten his car a handful of times, usually from a 30 roll or maybe even a 40 roll (ITS A BONE STOCK SUPRA, RELAX FAN BOYS). But last night he just absolutely destroyed me! Stock MK4 Supras came out the factory with 310 whp at most and he was able to out-pull my FBO Q60. This should not be possible lol. So after this experience I decided that its probably time for me to get a full fledge tune from ECUTEK. Probably going to hit up Specialty Z. Just thought I'd share this and would like to hear any of your guy's stories that made you realize the JB4 will only take you so far.