Well many have wondered and questioned, and now you have a TRUE 3rd party pre and post Bren Tune dyno report.
Bren Tuning came on the forum making claims that they could give our cars 40hp over stock with a tune. Many were in disbelief just as I was. Most people seem to only get 20-30hp with just a tune. Well I decided to take Bren up on his offer because he stated that if I wasnít happy I could return the tune for a full refund. So why not try it. So I order the tune from Bren. It came in 3-5 days later. In the box was a nice hand held touchscreen device that looks like a GPS device, along with a cable to connect to your computer or laptop and another cable to connect to the vehicle. The device seemed very straight forward and easy to use.
I had to download my stock map from the car and send it to Bren and he proceeded to do his magic. I received 4 maps back from Bren, original map, stock map, 93 octane map, and 100 octane map within a day. Next I was off to get baseline dyno numbers.
As some of you know I went to get pre-tune baseline dyno numbers done at Hillís Garage in Elkridge, Md. on March 21st. The owner Frank Hill was the operator of the dyno both times. The dyno used is a Dyno Tech dyno.
At that time my car's best baseline number was 434.8hp. Performance Mods to the car were: diy ram air scoops, RPI block off plates, BMC air filters, charcoal filter delete, resonator delete, RPI section 3 exhaust, and Sprint Booster (turned off during testing).
I proceeded to come home and load the 93 octane map that Bren sent. I drove the car for the next few weeks allowing the car to get used to the tune. I can say that immediately I could feel a difference in the butt dyno with the tune. The power delivery was smoother even with a 6 speed manual and when I got on it the power came on strong and didnít seem to want to end. I even took my friend, who has a M6 conv., he stated that it pulls like crazy. I also had a few pulls against a friend of mine with a 2010 911 4S PDK. From the launch and up to 120mph I would just put cars on him with ease. He stated that my car left out strong and he didnít have a chance even with all wheel drive.
I made another appointment with Hillís Garage to get post tune dyno numbers. The next available day was May 23rd. I got to the shop not knowing what to expect. I honestly didnít expect to get 40hp over my 434.8hp baseline. I wouldíve been happy to see 460-465hp. Well Frank, strapped the car onto the dyno and shortly we were off to making some runs. For the first 5-6 runs, we were alittle worried because the car was running so lean. And grant you, Frank only did the first 2 pulls to red line but after seeing that the car was in the 14ís with the a/f ratio he didnít go pass 6000rpm because the a/f wasnít changing. I switched the car back to the stock maps and still no difference.
I was sending the data logs to Bren while we were on the dyno via email. He replied do you have the car in M mode. Frank was worried about doing anymore pulls and was about to take the car off the dyno when I realized that the car wasnít in M mode for the 5-6 pulls that we did. Credit to Frank Hill, he doesnít tune or work on BMWís, he is a Nissan/Infiniti specialist therefore he didnít know anything about the M button so Iíll take all the blame for that lol. No worries, we got it figured out and the next pull was one that AMAZED Frank and I because we knew what the car made during pre-tune baseline. When that 488.9hp showed up on the dyno, we both screamed out DAMNNNNNN
eek in amazement because that was a 54.1hp increase over my best baseline number. (far more than the 40hp that Bren was advertising lol) We did another pull to make sure we were crazy and the car pulled 486hp. Did another pull and it pulled 487hp. Again same performance mods being: : diy ram air scoops, RPI block off plates, BMC air filters, charcoal filter delete, resonator delete, RPI section 3 exhaust, and Sprint Booster (turned off during testing).
Excited about the numbers I sent Bren the results and he called me ASAP amazed and excited as well. I told him that I was going to load the 100octane tune and put the Sunoco 104 race fuel in. He stated that we would need to let the car idle for a few to allow the fuels to mix and do about 5-6 pulls to allow the car to adapt but time was running into hour 2 and I didnít want to pay more than $200 being that we were already on the dyno coming up on 2hrs because I didnít realize that the car was no in M mode for the first 5-6 pulls. Either way we did a pull on the 100octane tune and it pull 489hp. I cleared the adaptions but the car hadnít had long enough to adapt to the tune and the race fuel. We did 2 more pulls and it didnít make more than the 489hp.
BUT on the way home, oh YES it had time to adapt and the fuel to mix and let me say, the car was a ROCKET SHIP. I had a half a tank of good 104/93 mix and let me tell you, I didnít want that experience to end. I even stopped by another shop on the way home and thought about buying one of their 5 gallon drums of VP 109 race fuel but I spent that extra $100 on the dyno so I said next time. LOL.
Iíll finish with this, there are a lot of variables when it comes to dynos, but I did just what Bren wanted someone to do, get their tune, take it to an independent shop to have before and post dyno numbers done. Bren doesnít know Frank Hill and Frank Hill, doesnít know Bren. Both are great tuners I will say. So for anyone in the market looking for a tune for our car, Bren is definitely in the talks now. You may not be able to get him on the phone because they are always on the dyno tuning or working on something, but he is always close to that email and will reply back in a timely manner.
Good luck to you all in whatever route you guys go. We are here to help and support each other.