Track Day 07_20_19 Cresson TEXAS
When to the track 1 week ago to shake down the new 2020 and what I needed to improve on. All I really ended up doing was programming other peoples ECU, and installing 2 Akra Full Exhaust on 2020's for the 1 week. I wanted to adjust rear height, replace the clip ons so I could adjust them in, drop the front gear to a 15, install the full Akra system. Well, all I got to do was install my full Akra system. However, so worth it on this XWORKS ECU. The shift cam really does work, and the pull all the way to 14,595 is awesome.
My warm up session I paced around at 1:24's. Came in and check pressures off the track, helped work on other people's bikes mostly. Next session I ramp'ed it to 1:22's . Now that pace is my K46 usual lap times with a PB at 1:21 on the K46 back in 2016 just after I added RCK3/HP power kit and started working with the DDC extensively. My next session out I was chasing a guy on a full race R6 that runs 1:19's and thought the monkey see monkey do idea of speed into the corners. If you carry alot of speed into a corner, you better we ready for the lean angles associated with actually making the corner. I managed to hit 61 degrees of lean angle. Everyone brag about Marc Marquez hitting 65 degrees a couple weeks ago and surviving to make another lap. I certainly feel that feeling now having survived 61 degrees on Pirelli SC1 slicks not really designed for that much lean angle on a stock bike. I ran 1:22 on that lap so all was good.
The Akra pipe cleaned up the wheelie control alot. I am sure you are thinking how did a full exhaust help in wheelie control. The torque curve. The torque curve changed enough that it matches the wheelie control parameters of the new 6 axis IMU. All you have to do is trust it and pin it. The control of the ECU is so nice you have maximum drive all the time with the front tire just slightly off the ground.
I have the new dyno graphs from the Race company in South Carolina now also. It is difficult to compare these numbers 100% because they are 2 weeks apart in the dyno sessions, and temp and humidity always plays a big part. Then there is the bike setup back on the dyno itself. They explain to me the detail they try very hard to use the same setup parameters each time including swingarm height strapping the rear down for maximum tire contact on the dyno wheel.
This is the 3rd gear pull. The ECU is stock with the Akra exhaust on the red line. The ECU is XWORKS with the Akra on the blue line. So we can see the nice HP and torque improvement in the mid 6500 to 8000.. then the nice HP and torque improvement from 13200 to the 14595.
Enjoy it if you got it !
Look forward to helping others as the new 2020 gets those break in miles shook off and making that decision to mod something that we all wish BMW could have made the best right off.
PS, I tried to blur out my happy face in that reflection on the left side. My gosh my smile riding that bike at race pace in 100 degree temps. The tires just stuck like glue on them.