The new 6 cylinder twin turbo BMW M4 M3 is the newest hot tuner car right now. As with any other high performance turbocharged vehicle, the potential is endless. Companies have already gotten on the modification train with exhaust systems and suspension upgrades. Here at VR Tuned, we want to make more horsepower on the new F80 F82 chassis and that is exactly what our ECU Tuning Box Kit does. As tested on our UK vehicle with 98ron the VR Tuned Tuning Box Kit gives your F80/F82 BMW M car a gain in power from 430bhp to 510bhp gaining you 80bhp (crank horsepower)! Peak torque went from 500nm to 630nm at the flywheel. On our USA BMW M4 we tested (as pictured), the car gained huge amounts of torque from the start of our test at 2500rpm all the way to about 6000rpm. Our tests were run on a Mustang all wheel drive dyno in AWD mode to not affect traction control issues. The car had a consistant horsepower increase from 3000rpm to 6300rpm. Nearly 70ft/lbs of torque was gained at 4000rpm with peak horsepower gains of nearly 60 all wheel horsepower at 4400rpm. Typical drivetrain loss on a Mustang AWD dyno is 20-25% which puts this BMW M4 on par with some great gains! The car definitely could use a better exhaust system and airflow to help the loss of top end power. Check out more pics and order your BMW M4 F82 ECU Tuning Box Here. Listen to the BMW M4 F82 Engine Rev Out Here! One Response VRTuned.com January 20, 2015 We have some explaining to do with the VR Tuned tuning box kit and our original test numbers. What we have found out is that on the back of the tuning box is a dial that is preset to 6. If you adjust this dial up or down, it helps the tune adapt to different fuel or environmental conditions. So we retested the Tuning Box at both setting 3 and 4 which fixed the huge drop in power at 6100rpm which was probably the car pulling timing. You can read more about this here – http://www.vrtuned.com/tuning/dialing-in-the-vr-tuned-tuning-box-kit/ So we tested the downpipes with the VR Tuned Tuning Box setup correctly and compared to our stock baseline. These were high flow cats to help the car breathe better but not affect emissions and cause any CEL. So the turbos are flowing better, but not 100% free flowing. The downpipes really picked up torque from 3700rpm all the way to our stop test with a peak gain of about 25ft/lbs and then maintained an average of about 10ft/lbs going further. When the turbos started to hit, you could really feel these kick in. On the horsepower side, the power again started at 3700rpm with a gain of about 15hp which held steady to about 6100rpm where it tapered down to about 10hp. All of this was run on 91 octane and in all wheel drive mode on our Mustang Dyno. Tests were also done in Sport Plus with traction control off. The results show a nice curve with the high flow cat downpipes adding some gains throughout the power curve. Once catless downpipes can be made and a better flowing exhaust, we should see even further gains happen! Log in to Reply Leave a Reply Cancel ReplyYou must be logged in to post a comment.